TY  - JOUR
AU  - Simić, Marko
AU  - Ružić, Jovana
AU  - Božić, Dušan
AU  - Stašić, Jelena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12331
AB  - Copper matrix composites exhibit excellent mechanical and thermal properties. The composite consists of copper (Cu), zirconium (Zr), and boron (B) and is produced using the powder metallurgy technique. The high-energy ball milling was applied for mechanical alloying of the Cu-Zr-B powder mixture to achieve the desired ratio for obtaining a copper matrix reinforced with ZrB2 ceramic particles. The milling times of 10 and 40 hours for two different ball-to-powder ratios are investigated for a powder mixture with a composition of Cu-2.71Zr-2.27B (wt.%). XRD and SEM analyses were employed to determine structural and morphological changes in the mechanically alloyed powder mixture. Investigation of the morphological parameters shows that with prolonged milling, the shape of mixed particles becomes more uniform, while their structural parameters have been drastically changed. It is determined that during high-energy ball milling of the Cu-2.71Zr-2.27B (wt.%), the size of the copper powder decreases as the mechanical alloying increases for both ball-powder ratios. Dislocation densities reach their maximum value at around 30 hours of mechanical alloying for both ball-powder ratios, with dislocation density being higher for the 1:15 ratio, after which they decrease owing to the recrystallization of the copper matrix. XRD analysis shows no presence of ZrB2 reinforcement particles or oxides during milling.
T2  - Metallurgical and Materials Data
T1  - The Effect of Ball-Powder Ratio on The Mechanical and Structural Properties of CuZrB Composite Materials Fabricated by Powder Metallurgy
VL  - 1
IS  - 1
SP  - 19
EP  - 24
DO  - 10.30544/MMD4
ER  - 

@article{
author = "Simić, Marko and Ružić, Jovana and Božić, Dušan and Stašić, Jelena",
year = "2023",
abstract = "Copper matrix composites exhibit excellent mechanical and thermal properties. The composite consists of copper (Cu), zirconium (Zr), and boron (B) and is produced using the powder metallurgy technique. The high-energy ball milling was applied for mechanical alloying of the Cu-Zr-B powder mixture to achieve the desired ratio for obtaining a copper matrix reinforced with ZrB2 ceramic particles. The milling times of 10 and 40 hours for two different ball-to-powder ratios are investigated for a powder mixture with a composition of Cu-2.71Zr-2.27B (wt.%). XRD and SEM analyses were employed to determine structural and morphological changes in the mechanically alloyed powder mixture. Investigation of the morphological parameters shows that with prolonged milling, the shape of mixed particles becomes more uniform, while their structural parameters have been drastically changed. It is determined that during high-energy ball milling of the Cu-2.71Zr-2.27B (wt.%), the size of the copper powder decreases as the mechanical alloying increases for both ball-powder ratios. Dislocation densities reach their maximum value at around 30 hours of mechanical alloying for both ball-powder ratios, with dislocation density being higher for the 1:15 ratio, after which they decrease owing to the recrystallization of the copper matrix. XRD analysis shows no presence of ZrB2 reinforcement particles or oxides during milling.",
journal = "Metallurgical and Materials Data",
title = "The Effect of Ball-Powder Ratio on The Mechanical and Structural Properties of CuZrB Composite Materials Fabricated by Powder Metallurgy",
volume = "1",
number = "1",
pages = "19-24",
doi = "10.30544/MMD4"
}

Simić, M., Ružić, J., Božić, D.,& Stašić, J.. (2023). The Effect of Ball-Powder Ratio on The Mechanical and Structural Properties of CuZrB Composite Materials Fabricated by Powder Metallurgy. in Metallurgical and Materials Data, 1(1), 19-24.
https://doi.org/10.30544/MMD4

Simić M, Ružić J, Božić D, Stašić J. The Effect of Ball-Powder Ratio on The Mechanical and Structural Properties of CuZrB Composite Materials Fabricated by Powder Metallurgy. in Metallurgical and Materials Data. 2023;1(1):19-24.
doi:10.30544/MMD4 .

Simić, Marko, Ružić, Jovana, Božić, Dušan, Stašić, Jelena, "The Effect of Ball-Powder Ratio on The Mechanical and Structural Properties of CuZrB Composite Materials Fabricated by Powder Metallurgy" in Metallurgical and Materials Data, 1, no. 1 (2023):19-24,
https://doi.org/10.30544/MMD4 . .

TY  - CONF
AU  - Stašić, Jelena
AU  - Trtica, Milan
AU  - Kuzmanović, M.
AU  - Savović, Jelena
AU  - Ružić, Jovana
AU  - Simić, M.
AU  - Chen, X.
AU  - Božić, Dušan
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11820
AB  - Austenitic stainless steel 316L finds a number of applications including filtration technology, nuclear industry, biomedicine, etc. Powder metallurgy (PM) allows obtaining the desired structure of the material, from full density to highly porous one, and PM technology most often comprises pressing and sintering steps. Gravity sintering, applied in this work, i.e. liquid phase sintering where the pressing step is excluded, is enabled by adding small amount of boron or its compound [1]. The addition of NiB lowers the sintering temperature by formation of eutectics (liquid phase), and also enhances mechanical properties (tensile strength, hardness) and corrosion resistance of 316L steel [2]. The aim of this work was to examine the surface behavior of PM-obtained 316L-NiB exposed to conditions of high heat fluxes by employing nanosecond laser pulses (TEA CO2 laser emitting at 10.6 μm, fluence ~14 J/cm2, intensity ~40 MW/cm2), which is reported scarcely in literature [3]. Simultaneously with irradiation in vacuum, plasma formed by laser irradiation above the sample surface was analyzed using LIBS (Laser Induced Breakdown Spectroscopy). Namely, small amount of boron (1 wt.% of NiB contains 83 wt.% of Ni and 17 wt.% of B) is not easily detected in gravity sintered sample and one of the techniques of choice could be the LIBS. For comparison purposes, 316L sample wihout NiB was also examined. Laser-irradiated surfaces were analyzed using SEM connected to EDX device. The damage was superficial, with intense melting in the central part of the irradiated spot, Fig. 1(a). LIBS analysis, Fig. 1(b), has shown successful in detecting the presence of boron in the 316L-NiB stainless steel, with low estimated limit of detection of 32 ppm.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Interaction of ns laser with 316L-NiB stainless steel obtained by powder metallurgy – morphological effects and LIBS analysis
SP  - 124
EP  - 124
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11820
ER  - 

@conference{
author = "Stašić, Jelena and Trtica, Milan and Kuzmanović, M. and Savović, Jelena and Ružić, Jovana and Simić, M. and Chen, X. and Božić, Dušan",
year = "2023",
abstract = "Austenitic stainless steel 316L finds a number of applications including filtration technology, nuclear industry, biomedicine, etc. Powder metallurgy (PM) allows obtaining the desired structure of the material, from full density to highly porous one, and PM technology most often comprises pressing and sintering steps. Gravity sintering, applied in this work, i.e. liquid phase sintering where the pressing step is excluded, is enabled by adding small amount of boron or its compound [1]. The addition of NiB lowers the sintering temperature by formation of eutectics (liquid phase), and also enhances mechanical properties (tensile strength, hardness) and corrosion resistance of 316L steel [2]. The aim of this work was to examine the surface behavior of PM-obtained 316L-NiB exposed to conditions of high heat fluxes by employing nanosecond laser pulses (TEA CO2 laser emitting at 10.6 μm, fluence ~14 J/cm2, intensity ~40 MW/cm2), which is reported scarcely in literature [3]. Simultaneously with irradiation in vacuum, plasma formed by laser irradiation above the sample surface was analyzed using LIBS (Laser Induced Breakdown Spectroscopy). Namely, small amount of boron (1 wt.% of NiB contains 83 wt.% of Ni and 17 wt.% of B) is not easily detected in gravity sintered sample and one of the techniques of choice could be the LIBS. For comparison purposes, 316L sample wihout NiB was also examined. Laser-irradiated surfaces were analyzed using SEM connected to EDX device. The damage was superficial, with intense melting in the central part of the irradiated spot, Fig. 1(a). LIBS analysis, Fig. 1(b), has shown successful in detecting the presence of boron in the 316L-NiB stainless steel, with low estimated limit of detection of 32 ppm.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Interaction of ns laser with 316L-NiB stainless steel obtained by powder metallurgy – morphological effects and LIBS analysis",
pages = "124-124",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11820"
}

Stašić, J., Trtica, M., Kuzmanović, M., Savović, J., Ružić, J., Simić, M., Chen, X.,& Božić, D.. (2023). Interaction of ns laser with 316L-NiB stainless steel obtained by powder metallurgy – morphological effects and LIBS analysis. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 124-124.
https://hdl.handle.net/21.15107/rcub_vinar_11820

Stašić J, Trtica M, Kuzmanović M, Savović J, Ružić J, Simić M, Chen X, Božić D. Interaction of ns laser with 316L-NiB stainless steel obtained by powder metallurgy – morphological effects and LIBS analysis. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:124-124.
https://hdl.handle.net/21.15107/rcub_vinar_11820 .

Stašić, Jelena, Trtica, Milan, Kuzmanović, M., Savović, Jelena, Ružić, Jovana, Simić, M., Chen, X., Božić, Dušan, "Interaction of ns laser with 316L-NiB stainless steel obtained by powder metallurgy – morphological effects and LIBS analysis" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):124-124,
https://hdl.handle.net/21.15107/rcub_vinar_11820 .

TY  - CONF
AU  - Simić, Marko
AU  - Ružić, Jovana
AU  - Nidžović, Emilija
AU  - Stašić, Jelena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12361
AB  - In powder form, copper (Cu) is the most used element in alloys and composites thanks to its affordability, availability, and capacity to easily improve its properties by adding just a few other elements [1]. It is then of no surprise that Cu composite materials find their application in various industries such as medical devices, aerospace, defense, automotive parts and electronics [2]. In this instance, a hybrid ternary Cu-2wt%Zr0.6wt%B composite was designed. Mechanical alloying (MA) was used to produce adequate powders for further composite manufacturing. The MA process was conducted in two different devices, Atritor Mill and Turbula Shaker Mixer, to determine the effect that the mixing type has on the final material. The milling parameters were set as (i.) duration for 10 h, 20 h, 30 h, and 40 h, (ii.) ball-to-powder ratio was 10:1, (iii.) inert atmosphere - argon. Electron microscopy and X-ray diffraction were used to investigate the microstructural and morphological properties of the Cu-Zr-B MA powder. Obtained results indicate that MA powders produced in Atritor show lower values of structural parameters (crystallite size, lattice parameter and lattice strain) compared to one in Turbula up to 30 h of milling. It should be noted that values of structural parameters after 40 h of milling in Turbula are lower compared to those in Atritor due to the recrystallization of Cu particles. Based on XRD results, the dislocation densities (ρ) were calculated and exhibited that MA powders milled in Atritor possess lower ρ values compared to MA powders milled in Turbula, except ρ of MA powders after 40 h. Higher values of observed structural parameters of MA powders revealed that during milling in Turbula, powders have been exposed to stronger forces in ball-powder-ball and ballpowder-wall collisions.
PB  - Belgrade : Serbian Chemical Society and Serbian Young Chemists' Club
C3  - 9th Conference of Young Chemists of Serbia : Book of abstracts
T1  - The effect of mechanical alloying parameters on the copper matrix composite materials
SP  - 163
EP  - 163
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12291
ER  - 

@conference{
author = "Simić, Marko and Ružić, Jovana and Nidžović, Emilija and Stašić, Jelena",
year = "2023",
abstract = "In powder form, copper (Cu) is the most used element in alloys and composites thanks to its affordability, availability, and capacity to easily improve its properties by adding just a few other elements [1]. It is then of no surprise that Cu composite materials find their application in various industries such as medical devices, aerospace, defense, automotive parts and electronics [2]. In this instance, a hybrid ternary Cu-2wt%Zr0.6wt%B composite was designed. Mechanical alloying (MA) was used to produce adequate powders for further composite manufacturing. The MA process was conducted in two different devices, Atritor Mill and Turbula Shaker Mixer, to determine the effect that the mixing type has on the final material. The milling parameters were set as (i.) duration for 10 h, 20 h, 30 h, and 40 h, (ii.) ball-to-powder ratio was 10:1, (iii.) inert atmosphere - argon. Electron microscopy and X-ray diffraction were used to investigate the microstructural and morphological properties of the Cu-Zr-B MA powder. Obtained results indicate that MA powders produced in Atritor show lower values of structural parameters (crystallite size, lattice parameter and lattice strain) compared to one in Turbula up to 30 h of milling. It should be noted that values of structural parameters after 40 h of milling in Turbula are lower compared to those in Atritor due to the recrystallization of Cu particles. Based on XRD results, the dislocation densities (ρ) were calculated and exhibited that MA powders milled in Atritor possess lower ρ values compared to MA powders milled in Turbula, except ρ of MA powders after 40 h. Higher values of observed structural parameters of MA powders revealed that during milling in Turbula, powders have been exposed to stronger forces in ball-powder-ball and ballpowder-wall collisions.",
publisher = "Belgrade : Serbian Chemical Society and Serbian Young Chemists' Club",
journal = "9th Conference of Young Chemists of Serbia : Book of abstracts",
title = "The effect of mechanical alloying parameters on the copper matrix composite materials",
pages = "163-163",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12291"
}

Simić, M., Ružić, J., Nidžović, E.,& Stašić, J.. (2023). The effect of mechanical alloying parameters on the copper matrix composite materials. in 9th Conference of Young Chemists of Serbia : Book of abstracts
Belgrade : Serbian Chemical Society and Serbian Young Chemists' Club., 163-163.
https://hdl.handle.net/21.15107/rcub_vinar_12291

Simić M, Ružić J, Nidžović E, Stašić J. The effect of mechanical alloying parameters on the copper matrix composite materials. in 9th Conference of Young Chemists of Serbia : Book of abstracts. 2023;:163-163.
https://hdl.handle.net/21.15107/rcub_vinar_12291 .

Simić, Marko, Ružić, Jovana, Nidžović, Emilija, Stašić, Jelena, "The effect of mechanical alloying parameters on the copper matrix composite materials" in 9th Conference of Young Chemists of Serbia : Book of abstracts (2023):163-163,
https://hdl.handle.net/21.15107/rcub_vinar_12291 .

TY  - JOUR
AU  - Simić, Marko
AU  - Ružić, Jovana
AU  - Božić, Dušan
AU  - Stoimenov, Nikolay
AU  - Gyoshev, Stanislav D.
AU  - Karastoyanov, Dimitar N.
AU  - Stašić, Jelena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11393
AB  - Copper-zirconium alloys with high conductivity were produced using powder metallurgy. Two-steps manufacturing process, containing mechanical alloying followed by hot pressing, was applied in achieving improved mechanical and physical properties of Cu-Zr alloy. In this paper, the influence of boron on Cu-Zr alloys properties was studied on Cu-1Zr (wt.%) and Cu-1.1Zr-0.3B (wt.%) systems. Scanning electron microscopy, laser nanoparticle sizer, computed tomography and X-ray diffraction were employed for observation of changes in the microstructure during production steps. More specifically – variations in size of the Cu particles, powder mixtures’ structural parameters, and development of CuZr phase in binary alloy, CuZr phase and ZrB2 particles in ternary alloy were observed. It was shown that presence of boron increases dislocation density in ternary alloy over the mechanical alloying time compared to binary alloy. The results presented in this study show higher hardening effect in Cu-Zr-B alloy compared to Cu-Zr alloy, resulting in stable hardness values during thermomechanical treatment. Further, it can be seen that finely dispersed reinforcing ZrB2 particles in copper matrix does not have significant influence on its conductivity. Moreover, both systems Cu-Zr and Cu-Zr-B exhibit better electrical conductivity after thermomechanical treatment as a result of zirconium reduction in solid solution due to its precipitation.
AB  - Високо проводне легуре бакра са додатком цирконијума произведене су
металургијом праха. У постизању побољшаних механичких и физичких својстава CuZr легуре примењен је двостепени процес производње, који садржи механичко легирање
праћено топлим пресовањем. У овом раду проучаван је утицај бора на својства Cu-Zr
легура поређењем система Cu-1Zr (теж.%) и Cu-1.1Zr-0.3В (теж.%). Промене у
микроструктури током производних корака праћене су помоћу метода: скенирајућа
електронска микроскопија, ласерско одређивање величина микро- и наночестица,
компјутерска томографија и рендгенска дифракција. Посебно су посматране
варијације у величини честица бакра, структурних параметара мешавине праха и
развој CuZr фазе у бинарној легури, као и CuZr фазе и ZrВ2 честица у терцијарној
легури. Показало се да присуство бора повећава густину дислокација у терцијарној
легури током механичког легирања у поређењу са бинарном легуром. Резултати
приказани у овој студији показују већи ефекат ојачавања у легури Cu-Zr-B у поређењу
са легуром Cu-Zr, што резултира стабилним вредностима тврдоће током термичке
обраде. Даље, може се видети да фино дисперговане честице ZrB2 у матрици бакра
показују незнатан утицај на њену проводљивост. Такође, оба система Cu-Zr и Cu-Zr-B
показују бољу електричну проводљивост након термичке обраде као резултат
редукције цирконијума у чврстом раствору услед његовог таложења.
T2  - Science of Sintering
T1  - The influence of boron addition on properties of copper-zirconium alloys
VL  - 55
IS  - 2
SP  - 205
EP  - 219
DO  - 10.2298/SOS220421003S
ER  - 

@article{
author = "Simić, Marko and Ružić, Jovana and Božić, Dušan and Stoimenov, Nikolay and Gyoshev, Stanislav D. and Karastoyanov, Dimitar N. and Stašić, Jelena",
year = "2023",
abstract = "Copper-zirconium alloys with high conductivity were produced using powder metallurgy. Two-steps manufacturing process, containing mechanical alloying followed by hot pressing, was applied in achieving improved mechanical and physical properties of Cu-Zr alloy. In this paper, the influence of boron on Cu-Zr alloys properties was studied on Cu-1Zr (wt.%) and Cu-1.1Zr-0.3B (wt.%) systems. Scanning electron microscopy, laser nanoparticle sizer, computed tomography and X-ray diffraction were employed for observation of changes in the microstructure during production steps. More specifically – variations in size of the Cu particles, powder mixtures’ structural parameters, and development of CuZr phase in binary alloy, CuZr phase and ZrB2 particles in ternary alloy were observed. It was shown that presence of boron increases dislocation density in ternary alloy over the mechanical alloying time compared to binary alloy. The results presented in this study show higher hardening effect in Cu-Zr-B alloy compared to Cu-Zr alloy, resulting in stable hardness values during thermomechanical treatment. Further, it can be seen that finely dispersed reinforcing ZrB2 particles in copper matrix does not have significant influence on its conductivity. Moreover, both systems Cu-Zr and Cu-Zr-B exhibit better electrical conductivity after thermomechanical treatment as a result of zirconium reduction in solid solution due to its precipitation., Високо проводне легуре бакра са додатком цирконијума произведене су
металургијом праха. У постизању побољшаних механичких и физичких својстава CuZr легуре примењен је двостепени процес производње, који садржи механичко легирање
праћено топлим пресовањем. У овом раду проучаван је утицај бора на својства Cu-Zr
легура поређењем система Cu-1Zr (теж.%) и Cu-1.1Zr-0.3В (теж.%). Промене у
микроструктури током производних корака праћене су помоћу метода: скенирајућа
електронска микроскопија, ласерско одређивање величина микро- и наночестица,
компјутерска томографија и рендгенска дифракција. Посебно су посматране
варијације у величини честица бакра, структурних параметара мешавине праха и
развој CuZr фазе у бинарној легури, као и CuZr фазе и ZrВ2 честица у терцијарној
легури. Показало се да присуство бора повећава густину дислокација у терцијарној
легури током механичког легирања у поређењу са бинарном легуром. Резултати
приказани у овој студији показују већи ефекат ојачавања у легури Cu-Zr-B у поређењу
са легуром Cu-Zr, што резултира стабилним вредностима тврдоће током термичке
обраде. Даље, може се видети да фино дисперговане честице ZrB2 у матрици бакра
показују незнатан утицај на њену проводљивост. Такође, оба система Cu-Zr и Cu-Zr-B
показују бољу електричну проводљивост након термичке обраде као резултат
редукције цирконијума у чврстом раствору услед његовог таложења.",
journal = "Science of Sintering",
title = "The influence of boron addition on properties of copper-zirconium alloys",
volume = "55",
number = "2",
pages = "205-219",
doi = "10.2298/SOS220421003S"
}

Simić, M., Ružić, J., Božić, D., Stoimenov, N., Gyoshev, S. D., Karastoyanov, D. N.,& Stašić, J.. (2023). The influence of boron addition on properties of copper-zirconium alloys. in Science of Sintering, 55(2), 205-219.
https://doi.org/10.2298/SOS220421003S

Simić M, Ružić J, Božić D, Stoimenov N, Gyoshev SD, Karastoyanov DN, Stašić J. The influence of boron addition on properties of copper-zirconium alloys. in Science of Sintering. 2023;55(2):205-219.
doi:10.2298/SOS220421003S .

Simić, Marko, Ružić, Jovana, Božić, Dušan, Stoimenov, Nikolay, Gyoshev, Stanislav D., Karastoyanov, Dimitar N., Stašić, Jelena, "The influence of boron addition on properties of copper-zirconium alloys" in Science of Sintering, 55, no. 2 (2023):205-219,
https://doi.org/10.2298/SOS220421003S . .

TY  - JOUR
AU  - Marković, Gordana
AU  - Manojlović, Vaso
AU  - Ružić, Jovana
AU  - Sokić, Miroslav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11722
AB  - Titanium alloys have been present for decades as the main components for the production of various orthopedic and dental elements. However, modern times require titanium alloys with a low Young’s modulus, and without the presence of cytotoxic alloying elements. Machine learning was used with aim to analyze biocompatible titanium alloys and predict the composition of Ti alloys with a low Young’s modulus. A database was created using experimental data for alloy composition, Young’s modulus, and mechanical and thermal properties of biocompatible titanium alloys. The Extra Tree Regression model was built to predict the Young’s modulus of titanium alloys. By processing data of 246 alloys, the specific heat was discovered to be the most influential parameter that contributes to the lowering of the Young’s modulus of titanium alloys. Further, the Monte Carlo method was used to predict the composition of future alloys with the desired properties. Simulation results of ten million samples, with predefined conditions for obtaining titanium alloys with a Young’s modulus lower than 70 GPa, show that it is possible to obtain several multicomponent alloys, consisting of five main elements: titanium, zirconium, tin, manganese and niobium.
T2  - Materials
T1  - Predicting Low-Modulus Biocompatible Titanium Alloys Using Machine Learning
VL  - 16
IS  - 19
SP  - 6355
DO  - 10.3390/ma16196355
ER  - 

@article{
author = "Marković, Gordana and Manojlović, Vaso and Ružić, Jovana and Sokić, Miroslav",
year = "2023",
abstract = "Titanium alloys have been present for decades as the main components for the production of various orthopedic and dental elements. However, modern times require titanium alloys with a low Young’s modulus, and without the presence of cytotoxic alloying elements. Machine learning was used with aim to analyze biocompatible titanium alloys and predict the composition of Ti alloys with a low Young’s modulus. A database was created using experimental data for alloy composition, Young’s modulus, and mechanical and thermal properties of biocompatible titanium alloys. The Extra Tree Regression model was built to predict the Young’s modulus of titanium alloys. By processing data of 246 alloys, the specific heat was discovered to be the most influential parameter that contributes to the lowering of the Young’s modulus of titanium alloys. Further, the Monte Carlo method was used to predict the composition of future alloys with the desired properties. Simulation results of ten million samples, with predefined conditions for obtaining titanium alloys with a Young’s modulus lower than 70 GPa, show that it is possible to obtain several multicomponent alloys, consisting of five main elements: titanium, zirconium, tin, manganese and niobium.",
journal = "Materials",
title = "Predicting Low-Modulus Biocompatible Titanium Alloys Using Machine Learning",
volume = "16",
number = "19",
pages = "6355",
doi = "10.3390/ma16196355"
}

Marković, G., Manojlović, V., Ružić, J.,& Sokić, M.. (2023). Predicting Low-Modulus Biocompatible Titanium Alloys Using Machine Learning. in Materials, 16(19), 6355.
https://doi.org/10.3390/ma16196355

Marković G, Manojlović V, Ružić J, Sokić M. Predicting Low-Modulus Biocompatible Titanium Alloys Using Machine Learning. in Materials. 2023;16(19):6355.
doi:10.3390/ma16196355 .

Marković, Gordana, Manojlović, Vaso, Ružić, Jovana, Sokić, Miroslav, "Predicting Low-Modulus Biocompatible Titanium Alloys Using Machine Learning" in Materials, 16, no. 19 (2023):6355,
https://doi.org/10.3390/ma16196355 . .

TY  - CONF
AU  - Ružić, Jovana
AU  - Simić, Marko
AU  - Božić, Dušan
AU  - Stoimenov, Nikolay
AU  - Goshev, Stanislav
AU  - Stašić, Jelena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12098
AB  - Copper-zirconium alloys with the minor addition of boron were manufactured using powder metallurgy, combining mechanical alloying, hot pressing, and sintering. The influence of boron on the mechanical properties of the Cu-Zr alloys was studied on Cu-1Zr (wt.%) and Cu-1.1Zr-0.3B (wt.%) systems. Scanning electron microscopy (SEM), laser nanoparticle sizer, computed tomography, and X-ray diffraction were employed for the observation of morphological and structural changes in the copper microstructure during manufacturing, as well as the development of CuZr phase and ZrB2 particles. Based on SEM and X-ray diffraction analysis, it can be seen that finely dispersed reinforcing ZrB2 particles in copper matrix occur only after the hot pressing process, and not during mechanical alloying. Mechanical properties of the copper-zirconium alloys were investigated using nanoindentation and microhardness tests. It was shown that the presence of a small boron amount, less than 3 wt.%, increases dislocation density in Cu-Zr-B powder mixture with increasing the duration of mechanical alloying. Moreover, analysis of the obtained results reviled that the addition of boron induces a higher hardening effect in Cu-Zr-B alloy compared to CuZr alloy, which results in more stable hardness values during thermomechanical treatment.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia (AMES)
C3  - MME SEE : 5th Metallurgical & Materials Engineering Congress of South-East Europe, June 7-10, 2023; Trebinje, Bosnia and Herzegovina
T1  - Study of the changes in mechanical properties of the copper-zirconium alloys influenced by minor boron addition
SP  - 30
EP  - 30
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12098
ER  - 

@conference{
author = "Ružić, Jovana and Simić, Marko and Božić, Dušan and Stoimenov, Nikolay and Goshev, Stanislav and Stašić, Jelena",
year = "2023",
abstract = "Copper-zirconium alloys with the minor addition of boron were manufactured using powder metallurgy, combining mechanical alloying, hot pressing, and sintering. The influence of boron on the mechanical properties of the Cu-Zr alloys was studied on Cu-1Zr (wt.%) and Cu-1.1Zr-0.3B (wt.%) systems. Scanning electron microscopy (SEM), laser nanoparticle sizer, computed tomography, and X-ray diffraction were employed for the observation of morphological and structural changes in the copper microstructure during manufacturing, as well as the development of CuZr phase and ZrB2 particles. Based on SEM and X-ray diffraction analysis, it can be seen that finely dispersed reinforcing ZrB2 particles in copper matrix occur only after the hot pressing process, and not during mechanical alloying. Mechanical properties of the copper-zirconium alloys were investigated using nanoindentation and microhardness tests. It was shown that the presence of a small boron amount, less than 3 wt.%, increases dislocation density in Cu-Zr-B powder mixture with increasing the duration of mechanical alloying. Moreover, analysis of the obtained results reviled that the addition of boron induces a higher hardening effect in Cu-Zr-B alloy compared to CuZr alloy, which results in more stable hardness values during thermomechanical treatment.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia (AMES)",
journal = "MME SEE : 5th Metallurgical & Materials Engineering Congress of South-East Europe, June 7-10, 2023; Trebinje, Bosnia and Herzegovina",
title = "Study of the changes in mechanical properties of the copper-zirconium alloys influenced by minor boron addition",
pages = "30-30",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12098"
}

Ružić, J., Simić, M., Božić, D., Stoimenov, N., Goshev, S.,& Stašić, J.. (2023). Study of the changes in mechanical properties of the copper-zirconium alloys influenced by minor boron addition. in MME SEE : 5th Metallurgical & Materials Engineering Congress of South-East Europe, June 7-10, 2023; Trebinje, Bosnia and Herzegovina
Belgrade : Association of Metallurgical Engineers of Serbia (AMES)., 30-30.
https://hdl.handle.net/21.15107/rcub_vinar_12098

Ružić J, Simić M, Božić D, Stoimenov N, Goshev S, Stašić J. Study of the changes in mechanical properties of the copper-zirconium alloys influenced by minor boron addition. in MME SEE : 5th Metallurgical & Materials Engineering Congress of South-East Europe, June 7-10, 2023; Trebinje, Bosnia and Herzegovina. 2023;:30-30.
https://hdl.handle.net/21.15107/rcub_vinar_12098 .

Ružić, Jovana, Simić, Marko, Božić, Dušan, Stoimenov, Nikolay, Goshev, Stanislav, Stašić, Jelena, "Study of the changes in mechanical properties of the copper-zirconium alloys influenced by minor boron addition" in MME SEE : 5th Metallurgical & Materials Engineering Congress of South-East Europe, June 7-10, 2023; Trebinje, Bosnia and Herzegovina (2023):30-30,
https://hdl.handle.net/21.15107/rcub_vinar_12098 .

TY  - CONF
AU  - Simić, Marko
AU  - Nidžović, Emilija
AU  - Radovanović, Željko
AU  - Ružić, Jovana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12328
AB  - In this study, the Cu-Zr-B ternary system was investigated as it has proven to be a promising composite material used in various industries, including aerospace, automotive, electronics, nuclear and tooling, among others. Owing to its versatility and a combination of desirable properties such as high strength and hardness, corrosion and wear resistance, and thermal stability, making it suitable for a wide range of applications. The effects of mechanical alloying (MA) parameters on the Cu-Zr-B properties, including ball-to-powder ratio, rotation speed, milling time, and milling atmosphere, were examined using the X-ray analysis, scanning electron microscopy, stereological analysis, and the Williamson-Hall analysis. Different mills, namely Atritor Mill and Turbula Shaker, were used in order to determine the effect that the type of mill has on the final structural parameters of the Cu-Zr-B. All results are given after 20 hours of mechanical alloying of the composite material. The rotation speed was around 300 rpm for both devices, and the ball-to-powder ratio was 10:1 for all the cases. It was shown that the ball size also plays a significant role in the final microstructural and morphological properties of the MA powders of the Cu-Zr-B. A comprehensive analysis showed that the powders produced in the Atritor mill (Powder 1, with a uniform ball size), as well as the powders produced in the Turbula where there was a range of different ball sizes used (Powder 2), showed lower values of dislocation density and crystalline size values compared to the powders produced in the Turbula with a uniform ball size (Powder 3). It is important to state that, with time, due to the plastic deformation mechanisms present, crystallite size decreases in all cases, with the lowest value again being powder 3.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Analysis of the change in structural parameters of mechanically alloyed Cu composite materials using different milling methods
SP  - 62
EP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12328
ER  - 

@conference{
author = "Simić, Marko and Nidžović, Emilija and Radovanović, Željko and Ružić, Jovana",
year = "2023",
abstract = "In this study, the Cu-Zr-B ternary system was investigated as it has proven to be a promising composite material used in various industries, including aerospace, automotive, electronics, nuclear and tooling, among others. Owing to its versatility and a combination of desirable properties such as high strength and hardness, corrosion and wear resistance, and thermal stability, making it suitable for a wide range of applications. The effects of mechanical alloying (MA) parameters on the Cu-Zr-B properties, including ball-to-powder ratio, rotation speed, milling time, and milling atmosphere, were examined using the X-ray analysis, scanning electron microscopy, stereological analysis, and the Williamson-Hall analysis. Different mills, namely Atritor Mill and Turbula Shaker, were used in order to determine the effect that the type of mill has on the final structural parameters of the Cu-Zr-B. All results are given after 20 hours of mechanical alloying of the composite material. The rotation speed was around 300 rpm for both devices, and the ball-to-powder ratio was 10:1 for all the cases. It was shown that the ball size also plays a significant role in the final microstructural and morphological properties of the MA powders of the Cu-Zr-B. A comprehensive analysis showed that the powders produced in the Atritor mill (Powder 1, with a uniform ball size), as well as the powders produced in the Turbula where there was a range of different ball sizes used (Powder 2), showed lower values of dislocation density and crystalline size values compared to the powders produced in the Turbula with a uniform ball size (Powder 3). It is important to state that, with time, due to the plastic deformation mechanisms present, crystallite size decreases in all cases, with the lowest value again being powder 3.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Analysis of the change in structural parameters of mechanically alloyed Cu composite materials using different milling methods",
pages = "62-62",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12328"
}

Simić, M., Nidžović, E., Radovanović, Ž.,& Ružić, J.. (2023). Analysis of the change in structural parameters of mechanically alloyed Cu composite materials using different milling methods. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 62-62.
https://hdl.handle.net/21.15107/rcub_vinar_12328

Simić M, Nidžović E, Radovanović Ž, Ružić J. Analysis of the change in structural parameters of mechanically alloyed Cu composite materials using different milling methods. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:62-62.
https://hdl.handle.net/21.15107/rcub_vinar_12328 .

Simić, Marko, Nidžović, Emilija, Radovanović, Željko, Ružić, Jovana, "Analysis of the change in structural parameters of mechanically alloyed Cu composite materials using different milling methods" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):62-62,
https://hdl.handle.net/21.15107/rcub_vinar_12328 .

TY  - JOUR
AU  - Watanabe, Ikumu
AU  - Ueshima, Nobufumi
AU  - Ružić, Jovana
AU  - Cui, Hongzhi
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10132
AB  - Various heat-resistant alloys have been used in industry; however, the bridge between the bulk mechanical properties and the underlying micro- and nanoscopic local properties remains an issue. In the Special Issue on the topic of “Multiscale Modelling and Characterization of Mechanical Properties in Heat-Resistant Alloys”, both theoretical and experimental approaches were discussed to evaluate its mechanical properties from multiscale aspects. In the Special Issue, six original articles were published. T. Saito et al. [1] and T. Chen et al. [2] investigated creep behavior; T. Saito et al. [1] focused on the deformation mechanism of a single-crystal high-entropy superalloy at intermediate temperature from theoretical and experimental aspects. T. Chen et al. [2] developed a measurement method of strain-rate-dependent plasticity using a high-temperature instrumented indentation test and its computational simulations. E. Bonifaz and I. Watanabe [3] developed a multiscale simulation method for an arc-welded joint, in which the residual stress state after the welding process was estimated in consideration of the anisotropic microstructure. Y. Yamabe-Mitarai et al. [4] and H. Park et al. [5] investigated the mechanical properties of high-temperature wrought alloys; Y. Yamabe-Mitarai et al. [4] studied the correlation between solution treatment temperature, microstructure, and yield strength. H. Park et al. [5] developed an inverse analysis method of the stress–strain curve from a high-temperature compression test. H. Zhou et al. [6] studied the relationship between the microstructure and mechanical property in a powder metallurgy. The state-of-the-art technologies are condensed in the above-mentioned articles. We hope that they will be helpful for further research.
T2  - Crystals
T1  - Multiscale Modelling and Characterization of Mechanical Properties in Heat-Resistant Alloys
VL  - 12
IS  - 1
SP  - 105
DO  - 10.3390/cryst12010105
ER  - 

@article{
author = "Watanabe, Ikumu and Ueshima, Nobufumi and Ružić, Jovana and Cui, Hongzhi",
year = "2022",
abstract = "Various heat-resistant alloys have been used in industry; however, the bridge between the bulk mechanical properties and the underlying micro- and nanoscopic local properties remains an issue. In the Special Issue on the topic of “Multiscale Modelling and Characterization of Mechanical Properties in Heat-Resistant Alloys”, both theoretical and experimental approaches were discussed to evaluate its mechanical properties from multiscale aspects. In the Special Issue, six original articles were published. T. Saito et al. [1] and T. Chen et al. [2] investigated creep behavior; T. Saito et al. [1] focused on the deformation mechanism of a single-crystal high-entropy superalloy at intermediate temperature from theoretical and experimental aspects. T. Chen et al. [2] developed a measurement method of strain-rate-dependent plasticity using a high-temperature instrumented indentation test and its computational simulations. E. Bonifaz and I. Watanabe [3] developed a multiscale simulation method for an arc-welded joint, in which the residual stress state after the welding process was estimated in consideration of the anisotropic microstructure. Y. Yamabe-Mitarai et al. [4] and H. Park et al. [5] investigated the mechanical properties of high-temperature wrought alloys; Y. Yamabe-Mitarai et al. [4] studied the correlation between solution treatment temperature, microstructure, and yield strength. H. Park et al. [5] developed an inverse analysis method of the stress–strain curve from a high-temperature compression test. H. Zhou et al. [6] studied the relationship between the microstructure and mechanical property in a powder metallurgy. The state-of-the-art technologies are condensed in the above-mentioned articles. We hope that they will be helpful for further research.",
journal = "Crystals",
title = "Multiscale Modelling and Characterization of Mechanical Properties in Heat-Resistant Alloys",
volume = "12",
number = "1",
pages = "105",
doi = "10.3390/cryst12010105"
}

Watanabe, I., Ueshima, N., Ružić, J.,& Cui, H.. (2022). Multiscale Modelling and Characterization of Mechanical Properties in Heat-Resistant Alloys. in Crystals, 12(1), 105.
https://doi.org/10.3390/cryst12010105

Watanabe I, Ueshima N, Ružić J, Cui H. Multiscale Modelling and Characterization of Mechanical Properties in Heat-Resistant Alloys. in Crystals. 2022;12(1):105.
doi:10.3390/cryst12010105 .

Watanabe, Ikumu, Ueshima, Nobufumi, Ružić, Jovana, Cui, Hongzhi, "Multiscale Modelling and Characterization of Mechanical Properties in Heat-Resistant Alloys" in Crystals, 12, no. 1 (2022):105,
https://doi.org/10.3390/cryst12010105 . .

TY  - JOUR
AU  - Perić, Dejan
AU  - Ružić, Jovana
AU  - Lević, Steva
AU  - Stašić, Jovana N.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10418
AB  - Introduction/Objective. The objective was to determine the degree of conversion (DC), cross-link density, percentage of leachable monomers, flexural strength (FS), and hardness (HV) of nanohybrid, nanofilled bulk-fill, giomer, fiber-reinforced, and low-shrinkage composites. Methods. Standardized specimens (n = 5/group) of Tetric EvoCeram Bulk Fill, Filtek Bulk Fill, Beautifil, EverX posterior, Kalore, Filtek Z250 (microhybrid control), and Tetric EvoCeram (nanohybrid control) were subjected to micro-Raman spectroscopy, three-point bending, and HV. Cross-linking density and leachable monomers were ascertained based on the ratio of HV and DC before and after immersion in absolute ethanol. Results. DC was in the range 50.4–70.5%, the highest for Filtek Bulk and the lowest for Kalore. The highest %DC change was in Beautifil (10.3%) and the lowest in Filtek Bulk (1.4%) and Z250 (1.28%). FS ranged between 78.9 MPa (TEC) and 126.7 MPa (Filtek Bulk). HV ranged between 58.6 (Kalore) and 113.9 (Z250) and significantly decreased post-immersion (19–55%). HV48h inversely correlated to HV% loss (r = -0.761), whilst DC positively correlated with FS (r = 0.893). Conclusion. Filtek Bulk, EverX, and Z250 showed the highest DC. The lowest DC and mechanical properties were observed for Kalore. The greatest cross-link density was shown by Filtek Bulk. There were up to 10% of leachable monomers. DC and FS positively correlated.
T2  - Srpski arhiv za celokupno lekarstvo
T1  - Polymer characteristics and mechanical properties of bulk-fill, giomer, fiber-reinforced and low-shrinkage composites
VL  - 150
IS  - 7-8
SP  - 414
EP  - 420
DO  - 10.2298/SARH220129055P
ER  - 

@article{
author = "Perić, Dejan and Ružić, Jovana and Lević, Steva and Stašić, Jovana N.",
year = "2022",
abstract = "Introduction/Objective. The objective was to determine the degree of conversion (DC), cross-link density, percentage of leachable monomers, flexural strength (FS), and hardness (HV) of nanohybrid, nanofilled bulk-fill, giomer, fiber-reinforced, and low-shrinkage composites. Methods. Standardized specimens (n = 5/group) of Tetric EvoCeram Bulk Fill, Filtek Bulk Fill, Beautifil, EverX posterior, Kalore, Filtek Z250 (microhybrid control), and Tetric EvoCeram (nanohybrid control) were subjected to micro-Raman spectroscopy, three-point bending, and HV. Cross-linking density and leachable monomers were ascertained based on the ratio of HV and DC before and after immersion in absolute ethanol. Results. DC was in the range 50.4–70.5%, the highest for Filtek Bulk and the lowest for Kalore. The highest %DC change was in Beautifil (10.3%) and the lowest in Filtek Bulk (1.4%) and Z250 (1.28%). FS ranged between 78.9 MPa (TEC) and 126.7 MPa (Filtek Bulk). HV ranged between 58.6 (Kalore) and 113.9 (Z250) and significantly decreased post-immersion (19–55%). HV48h inversely correlated to HV% loss (r = -0.761), whilst DC positively correlated with FS (r = 0.893). Conclusion. Filtek Bulk, EverX, and Z250 showed the highest DC. The lowest DC and mechanical properties were observed for Kalore. The greatest cross-link density was shown by Filtek Bulk. There were up to 10% of leachable monomers. DC and FS positively correlated.",
journal = "Srpski arhiv za celokupno lekarstvo",
title = "Polymer characteristics and mechanical properties of bulk-fill, giomer, fiber-reinforced and low-shrinkage composites",
volume = "150",
number = "7-8",
pages = "414-420",
doi = "10.2298/SARH220129055P"
}

Perić, D., Ružić, J., Lević, S.,& Stašić, J. N.. (2022). Polymer characteristics and mechanical properties of bulk-fill, giomer, fiber-reinforced and low-shrinkage composites. in Srpski arhiv za celokupno lekarstvo, 150(7-8), 414-420.
https://doi.org/10.2298/SARH220129055P

Perić D, Ružić J, Lević S, Stašić JN. Polymer characteristics and mechanical properties of bulk-fill, giomer, fiber-reinforced and low-shrinkage composites. in Srpski arhiv za celokupno lekarstvo. 2022;150(7-8):414-420.
doi:10.2298/SARH220129055P .

Perić, Dejan, Ružić, Jovana, Lević, Steva, Stašić, Jovana N., "Polymer characteristics and mechanical properties of bulk-fill, giomer, fiber-reinforced and low-shrinkage composites" in Srpski arhiv za celokupno lekarstvo, 150, no. 7-8 (2022):414-420,
https://doi.org/10.2298/SARH220129055P . .

TY  - CONF
AU  - Simić, Marko
AU  - Ružić, Jovana
AU  - Luković, Jelena
AU  - Božić, Dušan
AU  - Alil, Ana
AU  - Volkov Husović, Tatjana
AU  - Stašić, Jelena
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12093
AB  - Ternary Cu-2.71Zr-2.27B (wt.%) alloys were fabricated using powder metallurgy, i.e., mechanical alloying followed by cold pressing and sintering. Influence of the mechanical alloying parameters on microstructural and morphological changes of Cu-Zr-B powder mixture was investigated using scanning electron microscopy and X-ray diffraction. Stereological analysis was employed to determine changes in size and shape of copper particles during 40 hours of mechanical alloying. It was shown that with an increase in mechanical alloying time, the size of copper powder decreases. Williamson-Hall analysis was used to calculate crystallite sizes (D, nm), lattice parameter (nm), lattice strain (ε, %), and dislocation density (ρ, m-2). It was shown that with increasing mechanical allo ying time, lattice parameter as well as lattice strain both increases. Particles undergo high forces through ball-particle-ball and wall-particle-ball collisions during mechanical alloying. These collisions induce accumulation of dislocations in copper matrix and a decreasing in its crystallite size due to dominant plastic deformation mechanisms. Dislocation densities reach its maximum value at around 30 hours of mechanical alloying, after which they decrease owing to the recrystallization of copper matrix.
PB  - Beograd : Institut za istraživanja i projektovanja u privredi
C3  - YOURS 2022 : YOUng researcheRS conference 2022 : Book of abstracts
T1  - X-Ray analysis by Williamson-Hall and stereological analysis of mechanically alloyed Cu-Zr-B alloys
SP  - 13
EP  - 13
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12093
ER  - 

@conference{
author = "Simić, Marko and Ružić, Jovana and Luković, Jelena and Božić, Dušan and Alil, Ana and Volkov Husović, Tatjana and Stašić, Jelena",
year = "2022",
abstract = "Ternary Cu-2.71Zr-2.27B (wt.%) alloys were fabricated using powder metallurgy, i.e., mechanical alloying followed by cold pressing and sintering. Influence of the mechanical alloying parameters on microstructural and morphological changes of Cu-Zr-B powder mixture was investigated using scanning electron microscopy and X-ray diffraction. Stereological analysis was employed to determine changes in size and shape of copper particles during 40 hours of mechanical alloying. It was shown that with an increase in mechanical alloying time, the size of copper powder decreases. Williamson-Hall analysis was used to calculate crystallite sizes (D, nm), lattice parameter (nm), lattice strain (ε, %), and dislocation density (ρ, m-2). It was shown that with increasing mechanical allo ying time, lattice parameter as well as lattice strain both increases. Particles undergo high forces through ball-particle-ball and wall-particle-ball collisions during mechanical alloying. These collisions induce accumulation of dislocations in copper matrix and a decreasing in its crystallite size due to dominant plastic deformation mechanisms. Dislocation densities reach its maximum value at around 30 hours of mechanical alloying, after which they decrease owing to the recrystallization of copper matrix.",
publisher = "Beograd : Institut za istraživanja i projektovanja u privredi",
journal = "YOURS 2022 : YOUng researcheRS conference 2022 : Book of abstracts",
title = "X-Ray analysis by Williamson-Hall and stereological analysis of mechanically alloyed Cu-Zr-B alloys",
pages = "13-13",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12093"
}

Simić, M., Ružić, J., Luković, J., Božić, D., Alil, A., Volkov Husović, T.,& Stašić, J.. (2022). X-Ray analysis by Williamson-Hall and stereological analysis of mechanically alloyed Cu-Zr-B alloys. in YOURS 2022 : YOUng researcheRS conference 2022 : Book of abstracts
Beograd : Institut za istraživanja i projektovanja u privredi., 13-13.
https://hdl.handle.net/21.15107/rcub_vinar_12093

Simić M, Ružić J, Luković J, Božić D, Alil A, Volkov Husović T, Stašić J. X-Ray analysis by Williamson-Hall and stereological analysis of mechanically alloyed Cu-Zr-B alloys. in YOURS 2022 : YOUng researcheRS conference 2022 : Book of abstracts. 2022;:13-13.
https://hdl.handle.net/21.15107/rcub_vinar_12093 .

Simić, Marko, Ružić, Jovana, Luković, Jelena, Božić, Dušan, Alil, Ana, Volkov Husović, Tatjana, Stašić, Jelena, "X-Ray analysis by Williamson-Hall and stereological analysis of mechanically alloyed Cu-Zr-B alloys" in YOURS 2022 : YOUng researcheRS conference 2022 : Book of abstracts (2022):13-13,
https://hdl.handle.net/21.15107/rcub_vinar_12093 .

TY  - JOUR
AU  - Ružić, Jovana
AU  - Simić, Marko
AU  - Stoimenov, Nikolay
AU  - Božić, Dušan
AU  - Stašić, Jelena
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9629
AB  - Metal matrix composites (MMCs) belong to a group of modern materials owing to their excellent technological, mechanical, and physical properties such as excellent wear and corrosion resistance, high electrical and thermal conductivity, improved strength and hardness. Final properties of MMCs are affected equally by all steps of its manufacturing process. It is shown that by using adequate process parameters to obtain starting materials (reaching the specific size, shape, and reactivity) the control of volume fraction and distribution of reinforcements within the matrix can be achieved. For this purpose, mechanical alloying has been appointed as a good approach. MMCs can be produced using powder metallurgy, ingot metallurgy, and additive manufacturing techniques. Combining high-energy ball milling with these techniques enables the design of an innovative processing route for MMCs manufacturing. Mechanochemical process (achieved using high-energy ball milling) was employed in three manufacturing procedures: hot pressing, compocasting, and laser melting/sintering for obtaining of the suitable powder. These production routes for MMCs manufacturing were the subject of this work. The aim of MMCs design is to establish an optimal combination of production techniques merged into the cost-effective fabrication route for obtaining MMCs with required properties.
T2  - Metallurgical and Materials Engineering
T1  - Innovative processing routes in manufacturing of metal matrix composite materials
VL  - 27
IS  - 1
SP  - 1
EP  - 13
DO  - 10.30544/629
ER  - 

@article{
author = "Ružić, Jovana and Simić, Marko and Stoimenov, Nikolay and Božić, Dušan and Stašić, Jelena",
year = "2021",
abstract = "Metal matrix composites (MMCs) belong to a group of modern materials owing to their excellent technological, mechanical, and physical properties such as excellent wear and corrosion resistance, high electrical and thermal conductivity, improved strength and hardness. Final properties of MMCs are affected equally by all steps of its manufacturing process. It is shown that by using adequate process parameters to obtain starting materials (reaching the specific size, shape, and reactivity) the control of volume fraction and distribution of reinforcements within the matrix can be achieved. For this purpose, mechanical alloying has been appointed as a good approach. MMCs can be produced using powder metallurgy, ingot metallurgy, and additive manufacturing techniques. Combining high-energy ball milling with these techniques enables the design of an innovative processing route for MMCs manufacturing. Mechanochemical process (achieved using high-energy ball milling) was employed in three manufacturing procedures: hot pressing, compocasting, and laser melting/sintering for obtaining of the suitable powder. These production routes for MMCs manufacturing were the subject of this work. The aim of MMCs design is to establish an optimal combination of production techniques merged into the cost-effective fabrication route for obtaining MMCs with required properties.",
journal = "Metallurgical and Materials Engineering",
title = "Innovative processing routes in manufacturing of metal matrix composite materials",
volume = "27",
number = "1",
pages = "1-13",
doi = "10.30544/629"
}

Ružić, J., Simić, M., Stoimenov, N., Božić, D.,& Stašić, J.. (2021). Innovative processing routes in manufacturing of metal matrix composite materials. in Metallurgical and Materials Engineering, 27(1), 1-13.
https://doi.org/10.30544/629

Ružić J, Simić M, Stoimenov N, Božić D, Stašić J. Innovative processing routes in manufacturing of metal matrix composite materials. in Metallurgical and Materials Engineering. 2021;27(1):1-13.
doi:10.30544/629 .

Ružić, Jovana, Simić, Marko, Stoimenov, Nikolay, Božić, Dušan, Stašić, Jelena, "Innovative processing routes in manufacturing of metal matrix composite materials" in Metallurgical and Materials Engineering, 27, no. 1 (2021):1-13,
https://doi.org/10.30544/629 . .

TY  - JOUR
AU  - Bhattacharya, Somesh Kr.
AU  - Sahara, Ryoji
AU  - Božić, Dušan
AU  - Ružić, Jovana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9524
AB  - Copper matrix composite materials have exhibited a high potential in applications where excellent conductivity and mechanical properties are required. In this study, the machine learning models have been applied to predict the hardness of the copper matrix composite materials (CuMCs) produced via the powder metallurgy technique. Six different machine learning regression models were employed. The observed CuMCs were reinforced with two different volume fractions (2 vol.% and 7vol.%) of ZrB2 particles. Based on experimental work, we extracted the independent variables (features) like the milling time (MT, Hours), dislocation density (DD, m-2), average particle size (PS, μm), density (ρ, g/cm3), and yield stress (σ, MPa) while the Vickers hardness (MPa) was used as the dependent variable. Feature selection was performed by calculation the Pearson correlation coefficient (PCC) between the independent and dependent variables. The predictive accuracy higher than 80% was achieved for Cu-7vol.% ZrB2 and lower for the Cu-2vol.% ZrB2.
T2  - Metallurgical and Materials Engineering
T1  - Data analytics approach to predict the hardness of copper matrix composites
VL  - 26
IS  - 4
SP  - 357
EP  - 364
DO  - 10.30544/567
ER  - 

@article{
author = "Bhattacharya, Somesh Kr. and Sahara, Ryoji and Božić, Dušan and Ružić, Jovana",
year = "2020",
abstract = "Copper matrix composite materials have exhibited a high potential in applications where excellent conductivity and mechanical properties are required. In this study, the machine learning models have been applied to predict the hardness of the copper matrix composite materials (CuMCs) produced via the powder metallurgy technique. Six different machine learning regression models were employed. The observed CuMCs were reinforced with two different volume fractions (2 vol.% and 7vol.%) of ZrB2 particles. Based on experimental work, we extracted the independent variables (features) like the milling time (MT, Hours), dislocation density (DD, m-2), average particle size (PS, μm), density (ρ, g/cm3), and yield stress (σ, MPa) while the Vickers hardness (MPa) was used as the dependent variable. Feature selection was performed by calculation the Pearson correlation coefficient (PCC) between the independent and dependent variables. The predictive accuracy higher than 80% was achieved for Cu-7vol.% ZrB2 and lower for the Cu-2vol.% ZrB2.",
journal = "Metallurgical and Materials Engineering",
title = "Data analytics approach to predict the hardness of copper matrix composites",
volume = "26",
number = "4",
pages = "357-364",
doi = "10.30544/567"
}

Bhattacharya, S. Kr., Sahara, R., Božić, D.,& Ružić, J.. (2020). Data analytics approach to predict the hardness of copper matrix composites. in Metallurgical and Materials Engineering, 26(4), 357-364.
https://doi.org/10.30544/567

Bhattacharya SK, Sahara R, Božić D, Ružić J. Data analytics approach to predict the hardness of copper matrix composites. in Metallurgical and Materials Engineering. 2020;26(4):357-364.
doi:10.30544/567 .

Bhattacharya, Somesh Kr., Sahara, Ryoji, Božić, Dušan, Ružić, Jovana, "Data analytics approach to predict the hardness of copper matrix composites" in Metallurgical and Materials Engineering, 26, no. 4 (2020):357-364,
https://doi.org/10.30544/567 . .

TY  - JOUR
AU  - Simić, Marko
AU  - Radović, Nenad
AU  - Gordić, Milan V.
AU  - Ružić, Jovana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9525
AB  - Copper-based alloys and composites, owing to their convenient properties, are being considered essential materials in various industries. Since copper possesses an ability to develop high corrosion resistance, putting it in the domain of a desirable material in the manufacturing of valves, pipes, and also systems that carry industrial gases and aqueous fluids. Its usage is also invaluable for cables and electrical wires. This review paper describes diversity in copper alloy processing techniques (powder and ingot metallurgy) which are alongside the phase transformation kinetics interpreted and explained in detail. Furthermore, the focus is put on the copper alloys, as well as the kinetics present in these systems, with the application being highlighted. Correlation between physical properties and phase transformation kinetics in copper alloys is made. It is shown that if certain alloying elements are to be added, different properties could be improved. The effect of phase precipitation on phase transformation kinetics of copper alloys is shown by studying the Cu–15Ni–8Sn alloy.
T2  - Metallurgical and Materials Engineering
T1  - Effect of process parameters on the phase transformation kinetics in copper-based alloys and composites
VL  - 26
IS  - 4
SP  - 365
EP  - 373
DO  - 10.30544/571
ER  - 

@article{
author = "Simić, Marko and Radović, Nenad and Gordić, Milan V. and Ružić, Jovana",
year = "2020",
abstract = "Copper-based alloys and composites, owing to their convenient properties, are being considered essential materials in various industries. Since copper possesses an ability to develop high corrosion resistance, putting it in the domain of a desirable material in the manufacturing of valves, pipes, and also systems that carry industrial gases and aqueous fluids. Its usage is also invaluable for cables and electrical wires. This review paper describes diversity in copper alloy processing techniques (powder and ingot metallurgy) which are alongside the phase transformation kinetics interpreted and explained in detail. Furthermore, the focus is put on the copper alloys, as well as the kinetics present in these systems, with the application being highlighted. Correlation between physical properties and phase transformation kinetics in copper alloys is made. It is shown that if certain alloying elements are to be added, different properties could be improved. The effect of phase precipitation on phase transformation kinetics of copper alloys is shown by studying the Cu–15Ni–8Sn alloy.",
journal = "Metallurgical and Materials Engineering",
title = "Effect of process parameters on the phase transformation kinetics in copper-based alloys and composites",
volume = "26",
number = "4",
pages = "365-373",
doi = "10.30544/571"
}

Simić, M., Radović, N., Gordić, M. V.,& Ružić, J.. (2020). Effect of process parameters on the phase transformation kinetics in copper-based alloys and composites. in Metallurgical and Materials Engineering, 26(4), 365-373.
https://doi.org/10.30544/571

Simić M, Radović N, Gordić MV, Ružić J. Effect of process parameters on the phase transformation kinetics in copper-based alloys and composites. in Metallurgical and Materials Engineering. 2020;26(4):365-373.
doi:10.30544/571 .

Simić, Marko, Radović, Nenad, Gordić, Milan V., Ružić, Jovana, "Effect of process parameters on the phase transformation kinetics in copper-based alloys and composites" in Metallurgical and Materials Engineering, 26, no. 4 (2020):365-373,
https://doi.org/10.30544/571 . .

TY  - JOUR
AU  - Bobić, Biljana M.
AU  - Vencl, Aleksandar
AU  - Ružić, Jovana
AU  - Bobić, Ilija
AU  - Damnjanović, Zvonko
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8491
AB  - Particulate nanocomposites with the base of ZA27 alloy were synthesized using an innovative route, which includes mechanical milling and compocasting. Scrap from the matrix alloy and ceramic nanoreinforcements were mechanically milled using the ball-milling technique, which led to the formation of composite microparticles. The use of these particles in the compocasting process provided better wettability of ceramic nanoreinforcements in the semi-solid metal matrix, which resulted in a relatively good dispersion of the nanoreinforcements in nanocomposite castings. The presence of nanoreinforcements led to the grain refinement in the matrix of nanocomposites. The mechanical properties of the synthesized nanocomposites are improved and compared with the properties of the metal matrix. The observed increase in the hardness of nanocomposites with Al2O3 nanoreinforcements (20–30 nm) was 6.5% to 10.8%, while the yield strength of these nanocomposites has increased by 12.2% to 23.2%. The hardness and compressive yield strength of the nanocomposites with Al2O3 nanoparticles (100 nm) increased by 1.7% to 8.0% and 2.3% to 8.3%, respectively. The increase in hardness of the nanocomposites with SiC nanoparticles (50 nm) was 11.5% to 20.6%, while the increase in the yield strength was 15.6% to 24.5%. The greatest contribution to the overall strengthening in the synthesized nanocomposites is the result of increased dislocation density due to the difference in coefficients of thermal expansion for the matrix alloy and nanoreinforcements. © The Author(s) 2018.
T2  - Journal of Composite Materials
T1  - Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting
VL  - 53
IS  - 15
SP  - 2033
EP  - 2046
DO  - 10.1177/0021998318817876
ER  - 

@article{
author = "Bobić, Biljana M. and Vencl, Aleksandar and Ružić, Jovana and Bobić, Ilija and Damnjanović, Zvonko",
year = "2019",
abstract = "Particulate nanocomposites with the base of ZA27 alloy were synthesized using an innovative route, which includes mechanical milling and compocasting. Scrap from the matrix alloy and ceramic nanoreinforcements were mechanically milled using the ball-milling technique, which led to the formation of composite microparticles. The use of these particles in the compocasting process provided better wettability of ceramic nanoreinforcements in the semi-solid metal matrix, which resulted in a relatively good dispersion of the nanoreinforcements in nanocomposite castings. The presence of nanoreinforcements led to the grain refinement in the matrix of nanocomposites. The mechanical properties of the synthesized nanocomposites are improved and compared with the properties of the metal matrix. The observed increase in the hardness of nanocomposites with Al2O3 nanoreinforcements (20–30 nm) was 6.5% to 10.8%, while the yield strength of these nanocomposites has increased by 12.2% to 23.2%. The hardness and compressive yield strength of the nanocomposites with Al2O3 nanoparticles (100 nm) increased by 1.7% to 8.0% and 2.3% to 8.3%, respectively. The increase in hardness of the nanocomposites with SiC nanoparticles (50 nm) was 11.5% to 20.6%, while the increase in the yield strength was 15.6% to 24.5%. The greatest contribution to the overall strengthening in the synthesized nanocomposites is the result of increased dislocation density due to the difference in coefficients of thermal expansion for the matrix alloy and nanoreinforcements. © The Author(s) 2018.",
journal = "Journal of Composite Materials",
title = "Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting",
volume = "53",
number = "15",
pages = "2033-2046",
doi = "10.1177/0021998318817876"
}

Bobić, B. M., Vencl, A., Ružić, J., Bobić, I.,& Damnjanović, Z.. (2019). Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting. in Journal of Composite Materials, 53(15), 2033-2046.
https://doi.org/10.1177/0021998318817876

Bobić BM, Vencl A, Ružić J, Bobić I, Damnjanović Z. Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting. in Journal of Composite Materials. 2019;53(15):2033-2046.
doi:10.1177/0021998318817876 .

Bobić, Biljana M., Vencl, Aleksandar, Ružić, Jovana, Bobić, Ilija, Damnjanović, Zvonko, "Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting" in Journal of Composite Materials, 53, no. 15 (2019):2033-2046,
https://doi.org/10.1177/0021998318817876 . .

TY  - JOUR
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7578
AB  - The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials. (C) 2017 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Food Hydrocolloids
T1  - Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation
VL  - 77
SP  - 494
EP  - 501
DO  - 10.1016/j.foodhyd.2017.10.027
ER  - 

@article{
year = "2018",
abstract = "The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials. (C) 2017 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Food Hydrocolloids",
title = "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation",
volume = "77",
pages = "494-501",
doi = "10.1016/j.foodhyd.2017.10.027"
}

(2018). Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids
Elsevier., 77, 494-501.
https://doi.org/10.1016/j.foodhyd.2017.10.027

Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids. 2018;77:494-501.
doi:10.1016/j.foodhyd.2017.10.027 .

"Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation" in Food Hydrocolloids, 77 (2018):494-501,
https://doi.org/10.1016/j.foodhyd.2017.10.027 . .

TY  - JOUR
AU  - Božić, Dušan
AU  - Stanković, Nadežda
AU  - Ružić, Jovana
AU  - Stašić, Jelena
PY  - 2018
UR  - http://link.springer.com/10.1007/s00170-018-1839-7
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7752
AB  - The sintering of Fe-Cu and Fe-Cu-Ni3Al powder compacts by laser beam was studied to determine densification, microstructural development, and microhardness before and after thermo-mechanical treatments. Laser sintering (LS) was conducted using pulsed Nd:YAG laser, and optimum parameters of pulse energy, pulse length, pulse frequency, scanning speed, hatch spacing, and layer thickness were determined. Also, the effects of solidification rate, cold deformation (10%), and the addition of complex intermetallic Ni3Al (Fe, Ti, B) on microhardness were analyzed before and after the aging process. It was concluded that rapidly solidified structure, as well as the presence of Ni3Al particles and metastable CuFe phase, which are a product of laser sintering, affected a higher degree of iron matrix hardening which was retained up to high temperatures. Originality of investigations presented in this paper is in the employment of laser for synthesis of Fe-Cu-Ni3Al alloy, which was not discussed in the literature so far. Realization of this complex synthesis required consideration and adaptation of the laser sintering method which has been successfully applied for other types of alloys.
T2  - The International Journal of Advanced Manufacturing Technology
T1  - Synthesis and multiple hardening of a rapidly solidified iron-based matrix
VL  - 96
IS  - 9-12
SP  - 4009
EP  - 4019
DO  - 10.1007/s00170-018-1839-7
ER  - 

@article{
author = "Božić, Dušan and Stanković, Nadežda and Ružić, Jovana and Stašić, Jelena",
year = "2018",
abstract = "The sintering of Fe-Cu and Fe-Cu-Ni3Al powder compacts by laser beam was studied to determine densification, microstructural development, and microhardness before and after thermo-mechanical treatments. Laser sintering (LS) was conducted using pulsed Nd:YAG laser, and optimum parameters of pulse energy, pulse length, pulse frequency, scanning speed, hatch spacing, and layer thickness were determined. Also, the effects of solidification rate, cold deformation (10%), and the addition of complex intermetallic Ni3Al (Fe, Ti, B) on microhardness were analyzed before and after the aging process. It was concluded that rapidly solidified structure, as well as the presence of Ni3Al particles and metastable CuFe phase, which are a product of laser sintering, affected a higher degree of iron matrix hardening which was retained up to high temperatures. Originality of investigations presented in this paper is in the employment of laser for synthesis of Fe-Cu-Ni3Al alloy, which was not discussed in the literature so far. Realization of this complex synthesis required consideration and adaptation of the laser sintering method which has been successfully applied for other types of alloys.",
journal = "The International Journal of Advanced Manufacturing Technology",
title = "Synthesis and multiple hardening of a rapidly solidified iron-based matrix",
volume = "96",
number = "9-12",
pages = "4009-4019",
doi = "10.1007/s00170-018-1839-7"
}

Božić, D., Stanković, N., Ružić, J.,& Stašić, J.. (2018). Synthesis and multiple hardening of a rapidly solidified iron-based matrix. in The International Journal of Advanced Manufacturing Technology, 96(9-12), 4009-4019.
https://doi.org/10.1007/s00170-018-1839-7

Božić D, Stanković N, Ružić J, Stašić J. Synthesis and multiple hardening of a rapidly solidified iron-based matrix. in The International Journal of Advanced Manufacturing Technology. 2018;96(9-12):4009-4019.
doi:10.1007/s00170-018-1839-7 .

Božić, Dušan, Stanković, Nadežda, Ružić, Jovana, Stašić, Jelena, "Synthesis and multiple hardening of a rapidly solidified iron-based matrix" in The International Journal of Advanced Manufacturing Technology, 96, no. 9-12 (2018):4009-4019,
https://doi.org/10.1007/s00170-018-1839-7 . .

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Ružić, Jovana
AU  - Gordić, Milan V.
AU  - Ostojić, Sanja 
AU  - Micić, Darko M.
AU  - Onjia, Antonije E.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1446
AB  - In this work, the new biodegradable blend films composed of natural polymer pectin and synthetic polymer polyvinylpyrrolidone were obtained through casting process. The concentration of glycerol in all formulations was constant (2% v/v), while the amount of polyvinylpyrrolidone varied from 20 to 60% by mass of pectin. The molecular interactions between two components were elucidated by FTIR-ATR spectroscopy, while functional properties of these films were carried out by determination of puncture resistance, tensile strength, thermal stability, water vapor barrier, wettability and printability. The blending of pectin with PVP led to an improvement of mechanical resistance, barrier properties and hydrophobicity of these films for 57%, 58 and 24%, respectively, remaining adequate thermal stability. Since pectin and PVP are nontoxic, food-grade and biodegradable materials, this research present an ecosustainable approach to provide films with satisfied physical properties for use as packaging material of non-food products, such as water-treatment products (detergents, biocides, agrochemical compounds). (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Composites: Part B: Engineering
T1  - Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials
VL  - 110
SP  - 56
EP  - 61
DO  - 10.1016/j.compositesb.2016.11.016
ER  - 

@article{
author = "Nešić, Aleksandra and Ružić, Jovana and Gordić, Milan V. and Ostojić, Sanja  and Micić, Darko M. and Onjia, Antonije E.",
year = "2017",
abstract = "In this work, the new biodegradable blend films composed of natural polymer pectin and synthetic polymer polyvinylpyrrolidone were obtained through casting process. The concentration of glycerol in all formulations was constant (2% v/v), while the amount of polyvinylpyrrolidone varied from 20 to 60% by mass of pectin. The molecular interactions between two components were elucidated by FTIR-ATR spectroscopy, while functional properties of these films were carried out by determination of puncture resistance, tensile strength, thermal stability, water vapor barrier, wettability and printability. The blending of pectin with PVP led to an improvement of mechanical resistance, barrier properties and hydrophobicity of these films for 57%, 58 and 24%, respectively, remaining adequate thermal stability. Since pectin and PVP are nontoxic, food-grade and biodegradable materials, this research present an ecosustainable approach to provide films with satisfied physical properties for use as packaging material of non-food products, such as water-treatment products (detergents, biocides, agrochemical compounds). (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Composites: Part B: Engineering",
title = "Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials",
volume = "110",
pages = "56-61",
doi = "10.1016/j.compositesb.2016.11.016"
}

Nešić, A., Ružić, J., Gordić, M. V., Ostojić, S., Micić, D. M.,& Onjia, A. E.. (2017). Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials. in Composites: Part B: Engineering, 110, 56-61.
https://doi.org/10.1016/j.compositesb.2016.11.016

Nešić A, Ružić J, Gordić MV, Ostojić S, Micić DM, Onjia AE. Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials. in Composites: Part B: Engineering. 2017;110:56-61.
doi:10.1016/j.compositesb.2016.11.016 .

Nešić, Aleksandra, Ružić, Jovana, Gordić, Milan V., Ostojić, Sanja , Micić, Darko M., Onjia, Antonije E., "Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials" in Composites: Part B: Engineering, 110 (2017):56-61,
https://doi.org/10.1016/j.compositesb.2016.11.016 . .

TY  - JOUR
AU  - Dimčić, Biljana
AU  - Stašić, Jelena
AU  - Ružić, Jovana
AU  - Božić, Dušan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1505
AB  - The influence of microstructure, heat treatment and alloying addition on mechanical and fracture properties of Ti3Al-based intermetallic at room and elevated temperatures was studied. Ti3Al-11Nb-1Mo (mole fraction, %) alloy was consolidated via powder metallurgy processing by mechanical alloying (MA) and hot pressing (HP). MA powders were characterized using XRD and SEM-EDS. Optimum MA duration was 25 h and HP conditions of 1350 degrees C, 2 h, 35 MPa. After HP, solution treatment at 1050 degrees C for 1 h and water quenching alpha(2)+beta WidmanstAtten microstructure is present, while subsequent aging at 800 degrees C during 24 h induces small content of O-phase. High fraction of beta-phase is a direct consequence of Mo. Compression tests were performed from room temperature to 750 degrees C in vacuum. The yield strength of compacts increases with temperature up to 250 degrees C (pyramidal slip systems activation), after which it decreases. Ductility increases throughout the whole temperature range. The presence of O phase contributed to ductility increase in aged alloys, while negligibly lowering yield strength. Registered drop in the yield strength of aged alloys compared with non-aged ones was mostly influenced by precipitation of a. 2 particles. Mixed fracture modes are operative at all temperatures.
T2  - Transactions of Nonferrous Metals Society of China
T1  - Effect of synthesis parameters on structural and mechanical properties of Ti3Al-Nb-Mo intermetallic compound obtained by powder metallurgy techniques
VL  - 27
IS  - 3
SP  - 527
EP  - 537
DO  - 10.1016/S1003-6326(17)60059-1
ER  - 

@article{
author = "Dimčić, Biljana and Stašić, Jelena and Ružić, Jovana and Božić, Dušan",
year = "2017",
abstract = "The influence of microstructure, heat treatment and alloying addition on mechanical and fracture properties of Ti3Al-based intermetallic at room and elevated temperatures was studied. Ti3Al-11Nb-1Mo (mole fraction, %) alloy was consolidated via powder metallurgy processing by mechanical alloying (MA) and hot pressing (HP). MA powders were characterized using XRD and SEM-EDS. Optimum MA duration was 25 h and HP conditions of 1350 degrees C, 2 h, 35 MPa. After HP, solution treatment at 1050 degrees C for 1 h and water quenching alpha(2)+beta WidmanstAtten microstructure is present, while subsequent aging at 800 degrees C during 24 h induces small content of O-phase. High fraction of beta-phase is a direct consequence of Mo. Compression tests were performed from room temperature to 750 degrees C in vacuum. The yield strength of compacts increases with temperature up to 250 degrees C (pyramidal slip systems activation), after which it decreases. Ductility increases throughout the whole temperature range. The presence of O phase contributed to ductility increase in aged alloys, while negligibly lowering yield strength. Registered drop in the yield strength of aged alloys compared with non-aged ones was mostly influenced by precipitation of a. 2 particles. Mixed fracture modes are operative at all temperatures.",
journal = "Transactions of Nonferrous Metals Society of China",
title = "Effect of synthesis parameters on structural and mechanical properties of Ti3Al-Nb-Mo intermetallic compound obtained by powder metallurgy techniques",
volume = "27",
number = "3",
pages = "527-537",
doi = "10.1016/S1003-6326(17)60059-1"
}

Dimčić, B., Stašić, J., Ružić, J.,& Božić, D.. (2017). Effect of synthesis parameters on structural and mechanical properties of Ti3Al-Nb-Mo intermetallic compound obtained by powder metallurgy techniques. in Transactions of Nonferrous Metals Society of China, 27(3), 527-537.
https://doi.org/10.1016/S1003-6326(17)60059-1

Dimčić B, Stašić J, Ružić J, Božić D. Effect of synthesis parameters on structural and mechanical properties of Ti3Al-Nb-Mo intermetallic compound obtained by powder metallurgy techniques. in Transactions of Nonferrous Metals Society of China. 2017;27(3):527-537.
doi:10.1016/S1003-6326(17)60059-1 .

Dimčić, Biljana, Stašić, Jelena, Ružić, Jovana, Božić, Dušan, "Effect of synthesis parameters on structural and mechanical properties of Ti3Al-Nb-Mo intermetallic compound obtained by powder metallurgy techniques" in Transactions of Nonferrous Metals Society of China, 27, no. 3 (2017):527-537,
https://doi.org/10.1016/S1003-6326(17)60059-1 . .

TY  - JOUR
AU  - Omerašević, Mia
AU  - Ružić, Jovana
AU  - Vasiljević-Nedić, Bojana
AU  - Baščarević, Zvezdana D.
AU  - Bučevac, Dušan
AU  - Orlić, Jovana
AU  - Matović, Ljiljana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1734
AB  - Dense CsAlSi5O12 was successfully obtained by hot pressing of Cs-exchanged clinoptilolite at 900 degrees C. Simultaneous application of high temperature and mechanical pressure allowed formation of CsAlSi5O12 at temperature considerably lower than 1150 degrees C which was the lowest reported temperature of CsAlSi5O12 formation in pressureless sintered Cs-exchanged clinoptilolite. CsAlSi5O12 formation was preceded by complete amorphisation of Cs-exchanged clinoptilolite in temperature range between 700 and 900 degrees C. Bearing in mind that clinoptilolite possesses high affinity for Cs cation it is believed that hot pressing of Cs-exchanged clinoptilolite might be an efficient way to immobilize radioactive Cs by its incorporation into crystal lattice of stable CsAlSi5O12. The samples sintered at 950 degrees C had relative density about 84% of theoretical density and open porosity of only 6% which is expected to result in low Cs leaching rate.
T2  - Ceramics International
T1  - Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing
VL  - 43
IS  - 16
SP  - 13500
EP  - 13504
DO  - 10.1016/j.ceramint.2017.07.055
ER  - 

@article{
author = "Omerašević, Mia and Ružić, Jovana and Vasiljević-Nedić, Bojana and Baščarević, Zvezdana D. and Bučevac, Dušan and Orlić, Jovana and Matović, Ljiljana",
year = "2017",
abstract = "Dense CsAlSi5O12 was successfully obtained by hot pressing of Cs-exchanged clinoptilolite at 900 degrees C. Simultaneous application of high temperature and mechanical pressure allowed formation of CsAlSi5O12 at temperature considerably lower than 1150 degrees C which was the lowest reported temperature of CsAlSi5O12 formation in pressureless sintered Cs-exchanged clinoptilolite. CsAlSi5O12 formation was preceded by complete amorphisation of Cs-exchanged clinoptilolite in temperature range between 700 and 900 degrees C. Bearing in mind that clinoptilolite possesses high affinity for Cs cation it is believed that hot pressing of Cs-exchanged clinoptilolite might be an efficient way to immobilize radioactive Cs by its incorporation into crystal lattice of stable CsAlSi5O12. The samples sintered at 950 degrees C had relative density about 84% of theoretical density and open porosity of only 6% which is expected to result in low Cs leaching rate.",
journal = "Ceramics International",
title = "Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing",
volume = "43",
number = "16",
pages = "13500-13504",
doi = "10.1016/j.ceramint.2017.07.055"
}

Omerašević, M., Ružić, J., Vasiljević-Nedić, B., Baščarević, Z. D., Bučevac, D., Orlić, J.,& Matović, L.. (2017). Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing. in Ceramics International, 43(16), 13500-13504.
https://doi.org/10.1016/j.ceramint.2017.07.055

Omerašević M, Ružić J, Vasiljević-Nedić B, Baščarević ZD, Bučevac D, Orlić J, Matović L. Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing. in Ceramics International. 2017;43(16):13500-13504.
doi:10.1016/j.ceramint.2017.07.055 .

Omerašević, Mia, Ružić, Jovana, Vasiljević-Nedić, Bojana, Baščarević, Zvezdana D., Bučevac, Dušan, Orlić, Jovana, Matović, Ljiljana, "Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing" in Ceramics International, 43, no. 16 (2017):13500-13504,
https://doi.org/10.1016/j.ceramint.2017.07.055 . .

TY  - JOUR
AU  - Ružić, Jovana
AU  - Stašić, Jelena
AU  - Božić, Dušan
AU  - Dojčinović, Marina
AU  - Volkov-Husović, Tatjana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1942
AB  - Copper matrix composites reinforced with ZrB2 particles were produced in two ways: by hot pressing (HP) and laser-sintering process. Powder mixture Cu-Zr-B was mechanically alloyed before densification processes. Variations in the microstructure of treated samples obtained during cavitation test were analyzed by scanning electron microscopy (SEM). Cavitation erosion resistance was investigated with the standard test method for cavitation erosion using vibratory apparatus. Changes in mechanical alloying duration show a strong influence on cavitation erosion resistance of Cu-ZrB2 composites regardless the number of reinforcements. Laser-sintered samples show better cavitation erosion resistance than hot-pressed samples.
T2  - Metallurgical and Materials Engineering
T1  - Influence of the Fabrication Process of Copper Matrix Composites on Cavitation Erosion Resistance
VL  - 23
IS  - 4
SP  - 291
EP  - 301
DO  - 10.30544/244291
ER  - 

@article{
author = "Ružić, Jovana and Stašić, Jelena and Božić, Dušan and Dojčinović, Marina and Volkov-Husović, Tatjana",
year = "2017",
abstract = "Copper matrix composites reinforced with ZrB2 particles were produced in two ways: by hot pressing (HP) and laser-sintering process. Powder mixture Cu-Zr-B was mechanically alloyed before densification processes. Variations in the microstructure of treated samples obtained during cavitation test were analyzed by scanning electron microscopy (SEM). Cavitation erosion resistance was investigated with the standard test method for cavitation erosion using vibratory apparatus. Changes in mechanical alloying duration show a strong influence on cavitation erosion resistance of Cu-ZrB2 composites regardless the number of reinforcements. Laser-sintered samples show better cavitation erosion resistance than hot-pressed samples.",
journal = "Metallurgical and Materials Engineering",
title = "Influence of the Fabrication Process of Copper Matrix Composites on Cavitation Erosion Resistance",
volume = "23",
number = "4",
pages = "291-301",
doi = "10.30544/244291"
}

Ružić, J., Stašić, J., Božić, D., Dojčinović, M.,& Volkov-Husović, T.. (2017). Influence of the Fabrication Process of Copper Matrix Composites on Cavitation Erosion Resistance. in Metallurgical and Materials Engineering, 23(4), 291-301.
https://doi.org/10.30544/244291

Ružić J, Stašić J, Božić D, Dojčinović M, Volkov-Husović T. Influence of the Fabrication Process of Copper Matrix Composites on Cavitation Erosion Resistance. in Metallurgical and Materials Engineering. 2017;23(4):291-301.
doi:10.30544/244291 .

Ružić, Jovana, Stašić, Jelena, Božić, Dušan, Dojčinović, Marina, Volkov-Husović, Tatjana, "Influence of the Fabrication Process of Copper Matrix Composites on Cavitation Erosion Resistance" in Metallurgical and Materials Engineering, 23, no. 4 (2017):291-301,
https://doi.org/10.30544/244291 . .

TY  - JOUR
AU  - Ilić, Svetlana M.
AU  - Zec, Slavica
AU  - Rosić, Milena
AU  - Maksimović, Vesna
AU  - Ružić, Jovana
AU  - Urbanovich, Vladimir
AU  - Matović, Branko
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/925
AB  - Investigations of the high-pressure sintered nanocrystalline mullite powder are presented. The synthesized mullite powder with crystallite size of 51 nm was densified by using high-pressure anvil-type with hollows apparatus at 4 GPa over the temperature range of 1100-1500 degrees C in 100 degrees C steps. The phase composition and structural parameters of the densified samples were studied as a function of densification temperature. The XRD analysis revealed the appearance of new phases, such as kyanite and corundum, whose development affected the densities of the sintered samples. High relative densities of the sintered samples were obtained because of the application of high pressure. The needle-like microstructure was developed owing to the anisotropic grain growth of mullite. The elongated mullite grains reached the length of approximately 5 mu m at 1400 degrees C, whereas the grains treated at 1500 degrees C became thicker preserving the same needle length. The Vickers microhardness of the developed microstructures increased with the increase of temperature up to 1400 degrees C, while at 1500 degrees C it was slightly reduced due to the grain coarsening. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
PB  - Elsevier
T2  - Ceramics International
T1  - High pressure densification of nanocrystalline mullite powder
VL  - 42
IS  - 4
SP  - 5319
EP  - 5325
DO  - 10.1016/j.ceramint.2015.12.062
ER  - 

@article{
author = "Ilić, Svetlana M. and Zec, Slavica and Rosić, Milena and Maksimović, Vesna and Ružić, Jovana and Urbanovich, Vladimir and Matović, Branko",
year = "2016",
abstract = "Investigations of the high-pressure sintered nanocrystalline mullite powder are presented. The synthesized mullite powder with crystallite size of 51 nm was densified by using high-pressure anvil-type with hollows apparatus at 4 GPa over the temperature range of 1100-1500 degrees C in 100 degrees C steps. The phase composition and structural parameters of the densified samples were studied as a function of densification temperature. The XRD analysis revealed the appearance of new phases, such as kyanite and corundum, whose development affected the densities of the sintered samples. High relative densities of the sintered samples were obtained because of the application of high pressure. The needle-like microstructure was developed owing to the anisotropic grain growth of mullite. The elongated mullite grains reached the length of approximately 5 mu m at 1400 degrees C, whereas the grains treated at 1500 degrees C became thicker preserving the same needle length. The Vickers microhardness of the developed microstructures increased with the increase of temperature up to 1400 degrees C, while at 1500 degrees C it was slightly reduced due to the grain coarsening. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "High pressure densification of nanocrystalline mullite powder",
volume = "42",
number = "4",
pages = "5319-5325",
doi = "10.1016/j.ceramint.2015.12.062"
}

Ilić, S. M., Zec, S., Rosić, M., Maksimović, V., Ružić, J., Urbanovich, V.,& Matović, B.. (2016). High pressure densification of nanocrystalline mullite powder. in Ceramics International
Elsevier., 42(4), 5319-5325.
https://doi.org/10.1016/j.ceramint.2015.12.062

Ilić SM, Zec S, Rosić M, Maksimović V, Ružić J, Urbanovich V, Matović B. High pressure densification of nanocrystalline mullite powder. in Ceramics International. 2016;42(4):5319-5325.
doi:10.1016/j.ceramint.2015.12.062 .

Ilić, Svetlana M., Zec, Slavica, Rosić, Milena, Maksimović, Vesna, Ružić, Jovana, Urbanovich, Vladimir, Matović, Branko, "High pressure densification of nanocrystalline mullite powder" in Ceramics International, 42, no. 4 (2016):5319-5325,
https://doi.org/10.1016/j.ceramint.2015.12.062 . .

TY  - JOUR
AU  - Omerašević, Mia
AU  - Matović, Ljiljana
AU  - Ružić, Jovana
AU  - Golubović, Željko
AU  - Jovanović, Uroš D.
AU  - Mentus, Slavko V.
AU  - Dondur, Vera
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1038
AB  - A simple one-step method with direct thermal conversion at lower temperatures for preparing a stabile Cs-aluminsilicate phase, known as pollucite, is presented. Cs-exchanged form of Na, Ca-LTA type of zeolite (Cs-LTA) was pressureless sintered and hot pressed at certain temperatures in order to obtain pollucite. XRD and FTIR analysis were used to study structural changes of Cs-LTA before and after thermal treatments. Pressureless sintered sample recrystallized into pollucite phase after heat treatment at 1000 degrees C (3 h) (PLS1000) and hot pressed sample at 750 degrees C (3 h) using pressure of 35 MPa (HP750), indicating reduced temperature of 250 degrees. SEM micrographs confirmed that HP750 has higher density than PLS1000 which leads to higher value of compressive strength. The HP750 showed better resistance to Cs leaching than the PLS1000. Base on these results one can conclude that hot pressing is the promising method for the permanent disposal of Cs radionuclides. (C) 2016 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Journal of Nuclear Materials
T1  - Safe trapping of cesium into pollucite structure by hot-pressing method
VL  - 474
SP  - 35
EP  - 44
DO  - 10.1016/j.jnucmat.2016.03.006
ER  - 

@article{
author = "Omerašević, Mia and Matović, Ljiljana and Ružić, Jovana and Golubović, Željko and Jovanović, Uroš D. and Mentus, Slavko V. and Dondur, Vera",
year = "2016",
abstract = "A simple one-step method with direct thermal conversion at lower temperatures for preparing a stabile Cs-aluminsilicate phase, known as pollucite, is presented. Cs-exchanged form of Na, Ca-LTA type of zeolite (Cs-LTA) was pressureless sintered and hot pressed at certain temperatures in order to obtain pollucite. XRD and FTIR analysis were used to study structural changes of Cs-LTA before and after thermal treatments. Pressureless sintered sample recrystallized into pollucite phase after heat treatment at 1000 degrees C (3 h) (PLS1000) and hot pressed sample at 750 degrees C (3 h) using pressure of 35 MPa (HP750), indicating reduced temperature of 250 degrees. SEM micrographs confirmed that HP750 has higher density than PLS1000 which leads to higher value of compressive strength. The HP750 showed better resistance to Cs leaching than the PLS1000. Base on these results one can conclude that hot pressing is the promising method for the permanent disposal of Cs radionuclides. (C) 2016 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Nuclear Materials",
title = "Safe trapping of cesium into pollucite structure by hot-pressing method",
volume = "474",
pages = "35-44",
doi = "10.1016/j.jnucmat.2016.03.006"
}

Omerašević, M., Matović, L., Ružić, J., Golubović, Ž., Jovanović, U. D., Mentus, S. V.,& Dondur, V.. (2016). Safe trapping of cesium into pollucite structure by hot-pressing method. in Journal of Nuclear Materials
Elsevier., 474, 35-44.
https://doi.org/10.1016/j.jnucmat.2016.03.006

Omerašević M, Matović L, Ružić J, Golubović Ž, Jovanović UD, Mentus SV, Dondur V. Safe trapping of cesium into pollucite structure by hot-pressing method. in Journal of Nuclear Materials. 2016;474:35-44.
doi:10.1016/j.jnucmat.2016.03.006 .

Omerašević, Mia, Matović, Ljiljana, Ružić, Jovana, Golubović, Željko, Jovanović, Uroš D., Mentus, Slavko V., Dondur, Vera, "Safe trapping of cesium into pollucite structure by hot-pressing method" in Journal of Nuclear Materials, 474 (2016):35-44,
https://doi.org/10.1016/j.jnucmat.2016.03.006 . .

TY  - JOUR
AU  - Omerašević, Mia
AU  - Ružić, Jovana
AU  - Vuković, Nikola
AU  - Jovanović, Uroš D.
AU  - Mirković, Miljana M.
AU  - Maksimović, Vesna
AU  - Dondur, Vera
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1130
AB  - The possibility to use natural zeolite - clinoptilolite as a host material for radioactive Cs immobilization has been investigated. Cs-exchanged form of clinoptilolite which was prepared by treatment of clinoptilolite powder with 0.25 M CsCl solution was compacted. Both, powder and powder compact of exchanged clinoptilolite were thermally treated at 1200 C-0. The XRPD analysis showed that Cs was successfully immobilized after heat treatment by formation of stable cesium dodecaoxo-alumopentasilicate in both, powder sample and compact. The newly formed compound showed satisfactory Cs ions retention during leaching test. The sintered compact showed somewhat better resistance to Cs leaching than the thermally treated powder. The compressive strength of sintered compact was close to 200 MPa which is more than enough for easy handling and safe storage.
T2  - Science of Sintering
T1  - Removal of Cs Ions from Aqueous Solutions by Using Matrices of Natural Clinoptilolite and its Safe Disposal
VL  - 48
IS  - 1
SP  - 101
EP  - 107
DO  - 10.2298/SOS1601101O
ER  - 

@article{
author = "Omerašević, Mia and Ružić, Jovana and Vuković, Nikola and Jovanović, Uroš D. and Mirković, Miljana M. and Maksimović, Vesna and Dondur, Vera",
year = "2016",
abstract = "The possibility to use natural zeolite - clinoptilolite as a host material for radioactive Cs immobilization has been investigated. Cs-exchanged form of clinoptilolite which was prepared by treatment of clinoptilolite powder with 0.25 M CsCl solution was compacted. Both, powder and powder compact of exchanged clinoptilolite were thermally treated at 1200 C-0. The XRPD analysis showed that Cs was successfully immobilized after heat treatment by formation of stable cesium dodecaoxo-alumopentasilicate in both, powder sample and compact. The newly formed compound showed satisfactory Cs ions retention during leaching test. The sintered compact showed somewhat better resistance to Cs leaching than the thermally treated powder. The compressive strength of sintered compact was close to 200 MPa which is more than enough for easy handling and safe storage.",
journal = "Science of Sintering",
title = "Removal of Cs Ions from Aqueous Solutions by Using Matrices of Natural Clinoptilolite and its Safe Disposal",
volume = "48",
number = "1",
pages = "101-107",
doi = "10.2298/SOS1601101O"
}

Omerašević, M., Ružić, J., Vuković, N., Jovanović, U. D., Mirković, M. M., Maksimović, V.,& Dondur, V.. (2016). Removal of Cs Ions from Aqueous Solutions by Using Matrices of Natural Clinoptilolite and its Safe Disposal. in Science of Sintering, 48(1), 101-107.
https://doi.org/10.2298/SOS1601101O

Omerašević M, Ružić J, Vuković N, Jovanović UD, Mirković MM, Maksimović V, Dondur V. Removal of Cs Ions from Aqueous Solutions by Using Matrices of Natural Clinoptilolite and its Safe Disposal. in Science of Sintering. 2016;48(1):101-107.
doi:10.2298/SOS1601101O .

Omerašević, Mia, Ružić, Jovana, Vuković, Nikola, Jovanović, Uroš D., Mirković, Miljana M., Maksimović, Vesna, Dondur, Vera, "Removal of Cs Ions from Aqueous Solutions by Using Matrices of Natural Clinoptilolite and its Safe Disposal" in Science of Sintering, 48, no. 1 (2016):101-107,
https://doi.org/10.2298/SOS1601101O . .

TY  - JOUR
AU  - Božić, Dušan
AU  - Vilotijević, Miroljub N.
AU  - Ružić, Jovana
AU  - Jovanović, Uroš D.
AU  - Stašić, Jelena
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1417
AB  - The present work demonstrates a procedure for synthesis of stainless steel powder by gravity sintering method. As an additive to the basic powder, NiB powder was added in the amount of 0.2 - 1.0 wt.%. Gravity sintering was done in vacuum, at the temperatures of 1100 degrees C - 1250 degrees C, in the course of 3 - 60 min, using ceramic mould. Structural characterization was conducted by XRD, and microstructural analysis by optical and scanning electron microscope (SEM). Mechanical properties were investigated by tensile tests with steel rings. Density and permeability were determined by standard techniques for porous samples. Gravity sintered stainless steel with NiB addition had more superior mechanical and physico-chemical properties compared to stainless steel obtained by standard powder metallurgy procedures - pressing and sintering.
T2  - Science of Sintering
T1  - Microstructure and Properties of Gravity Sintered 316L Stainless Steel Powder with Nickel boride Addition
VL  - 48
IS  - 3
SP  - 293
EP  - 302
DO  - 10.2298/SOS1603293B
ER  - 

@article{
author = "Božić, Dušan and Vilotijević, Miroljub N. and Ružić, Jovana and Jovanović, Uroš D. and Stašić, Jelena",
year = "2016",
abstract = "The present work demonstrates a procedure for synthesis of stainless steel powder by gravity sintering method. As an additive to the basic powder, NiB powder was added in the amount of 0.2 - 1.0 wt.%. Gravity sintering was done in vacuum, at the temperatures of 1100 degrees C - 1250 degrees C, in the course of 3 - 60 min, using ceramic mould. Structural characterization was conducted by XRD, and microstructural analysis by optical and scanning electron microscope (SEM). Mechanical properties were investigated by tensile tests with steel rings. Density and permeability were determined by standard techniques for porous samples. Gravity sintered stainless steel with NiB addition had more superior mechanical and physico-chemical properties compared to stainless steel obtained by standard powder metallurgy procedures - pressing and sintering.",
journal = "Science of Sintering",
title = "Microstructure and Properties of Gravity Sintered 316L Stainless Steel Powder with Nickel boride Addition",
volume = "48",
number = "3",
pages = "293-302",
doi = "10.2298/SOS1603293B"
}

Božić, D., Vilotijević, M. N., Ružić, J., Jovanović, U. D.,& Stašić, J.. (2016). Microstructure and Properties of Gravity Sintered 316L Stainless Steel Powder with Nickel boride Addition. in Science of Sintering, 48(3), 293-302.
https://doi.org/10.2298/SOS1603293B

Božić D, Vilotijević MN, Ružić J, Jovanović UD, Stašić J. Microstructure and Properties of Gravity Sintered 316L Stainless Steel Powder with Nickel boride Addition. in Science of Sintering. 2016;48(3):293-302.
doi:10.2298/SOS1603293B .

Božić, Dušan, Vilotijević, Miroljub N., Ružić, Jovana, Jovanović, Uroš D., Stašić, Jelena, "Microstructure and Properties of Gravity Sintered 316L Stainless Steel Powder with Nickel boride Addition" in Science of Sintering, 48, no. 3 (2016):293-302,
https://doi.org/10.2298/SOS1603293B . .

TY  - JOUR
AU  - Stašić, Jelena
AU  - Rajković, Višeslava M.
AU  - Ružić, Jovana
AU  - Božić, Dušan
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/720
AB  - Cold pressed mechanically alloyed Cu-1Zr (wt%) and Cu-4.1Zr-1.1B (wt%) powders were sintered by laser irradiation. Laser employed was pulsed, millisecond Nd:YAG laser system. The influence of different sintering parameters on structural, mechanical, and physical properties of laser-sintered materials was investigated. Microstructural changes during laser sintering were studied using scanning electron microscopy and X-ray diffraction. High hardening of the Cu-Zr alloy is achieved by thermal treatment due to the influence of the developed rapidly solidified structure and precipitation of metastable CuZr. In ternary Cu-Zr-B alloy rapidly solidified structure, as well as the presence of ZrB2 particles and metastable CuZr phase, affected much higher degree of copper matrix hardening which, thanks to the ceramic particles, is retained at high temperatures. It was determined that the optimum combination of high density, microhardness, and electrical conductivity is reached using the following parameters: laser frequency 3 Hz, laser pulse duration 8 ms, pulse energy similar to 19 J, number of scans 3 (binary alloy), i.e., 4 (ternary alloy).
T2  - International Journal of Advanced Manufacturing Technology
T1  - An investigation on synthesis development of high hardened, high conductivity Cu-Zr and Cu-Zr-ZrB2 alloys through green compact laser sintering
VL  - 80
IS  - 5-8
SP  - 1049
EP  - 1057
DO  - 10.1007/s00170-015-7098-y
ER  - 

@article{
author = "Stašić, Jelena and Rajković, Višeslava M. and Ružić, Jovana and Božić, Dušan",
year = "2015",
abstract = "Cold pressed mechanically alloyed Cu-1Zr (wt%) and Cu-4.1Zr-1.1B (wt%) powders were sintered by laser irradiation. Laser employed was pulsed, millisecond Nd:YAG laser system. The influence of different sintering parameters on structural, mechanical, and physical properties of laser-sintered materials was investigated. Microstructural changes during laser sintering were studied using scanning electron microscopy and X-ray diffraction. High hardening of the Cu-Zr alloy is achieved by thermal treatment due to the influence of the developed rapidly solidified structure and precipitation of metastable CuZr. In ternary Cu-Zr-B alloy rapidly solidified structure, as well as the presence of ZrB2 particles and metastable CuZr phase, affected much higher degree of copper matrix hardening which, thanks to the ceramic particles, is retained at high temperatures. It was determined that the optimum combination of high density, microhardness, and electrical conductivity is reached using the following parameters: laser frequency 3 Hz, laser pulse duration 8 ms, pulse energy similar to 19 J, number of scans 3 (binary alloy), i.e., 4 (ternary alloy).",
journal = "International Journal of Advanced Manufacturing Technology",
title = "An investigation on synthesis development of high hardened, high conductivity Cu-Zr and Cu-Zr-ZrB2 alloys through green compact laser sintering",
volume = "80",
number = "5-8",
pages = "1049-1057",
doi = "10.1007/s00170-015-7098-y"
}

Stašić, J., Rajković, V. M., Ružić, J.,& Božić, D.. (2015). An investigation on synthesis development of high hardened, high conductivity Cu-Zr and Cu-Zr-ZrB2 alloys through green compact laser sintering. in International Journal of Advanced Manufacturing Technology, 80(5-8), 1049-1057.
https://doi.org/10.1007/s00170-015-7098-y

Stašić J, Rajković VM, Ružić J, Božić D. An investigation on synthesis development of high hardened, high conductivity Cu-Zr and Cu-Zr-ZrB2 alloys through green compact laser sintering. in International Journal of Advanced Manufacturing Technology. 2015;80(5-8):1049-1057.
doi:10.1007/s00170-015-7098-y .

Stašić, Jelena, Rajković, Višeslava M., Ružić, Jovana, Božić, Dušan, "An investigation on synthesis development of high hardened, high conductivity Cu-Zr and Cu-Zr-ZrB2 alloys through green compact laser sintering" in International Journal of Advanced Manufacturing Technology, 80, no. 5-8 (2015):1049-1057,
https://doi.org/10.1007/s00170-015-7098-y . .