TY  - JOUR
AU  - Božić, Dušan
AU  - Rajković, Višeslava M.
AU  - Jovanović, Milan T.
AU  - Dimčić, Biljana
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4258
AB  - Compacts of Ti-6Al-4V alloy were produced via the powder metallurgy technique applying the hydride-dehydride process and hot isostatic pressing. The conditions of reversible hydride-dehydride process were controlled by chemical and X-ray diffraction analysis and scanning electron microscopy. Powders were pressed above and below the alpha - GT beta transus temperature. The presence of titanium hydrides and morphology of the microstructure have the direct influence on the tensile properties and fracture toughness of the Ti-6Al-4V alloy, but the effect of microstructure is more pronounced.
T2  - Powder Metallurgy
T1  - Influence of retained hydride particles and microstructure on mechanical properties of PM produced Ti-6Al-4V alloy
VL  - 54
IS  - 1
SP  - 40
EP  - 45
DO  - 10.1179/174329009X409606
ER  - 

@article{
author = "Božić, Dušan and Rajković, Višeslava M. and Jovanović, Milan T. and Dimčić, Biljana",
year = "2011",
abstract = "Compacts of Ti-6Al-4V alloy were produced via the powder metallurgy technique applying the hydride-dehydride process and hot isostatic pressing. The conditions of reversible hydride-dehydride process were controlled by chemical and X-ray diffraction analysis and scanning electron microscopy. Powders were pressed above and below the alpha - GT beta transus temperature. The presence of titanium hydrides and morphology of the microstructure have the direct influence on the tensile properties and fracture toughness of the Ti-6Al-4V alloy, but the effect of microstructure is more pronounced.",
journal = "Powder Metallurgy",
title = "Influence of retained hydride particles and microstructure on mechanical properties of PM produced Ti-6Al-4V alloy",
volume = "54",
number = "1",
pages = "40-45",
doi = "10.1179/174329009X409606"
}

Božić, D., Rajković, V. M., Jovanović, M. T.,& Dimčić, B.. (2011). Influence of retained hydride particles and microstructure on mechanical properties of PM produced Ti-6Al-4V alloy. in Powder Metallurgy, 54(1), 40-45.
https://doi.org/10.1179/174329009X409606

Božić D, Rajković VM, Jovanović MT, Dimčić B. Influence of retained hydride particles and microstructure on mechanical properties of PM produced Ti-6Al-4V alloy. in Powder Metallurgy. 2011;54(1):40-45.
doi:10.1179/174329009X409606 .

Božić, Dušan, Rajković, Višeslava M., Jovanović, Milan T., Dimčić, Biljana, "Influence of retained hydride particles and microstructure on mechanical properties of PM produced Ti-6Al-4V alloy" in Powder Metallurgy, 54, no. 1 (2011):40-45,
https://doi.org/10.1179/174329009X409606 . .

TY  - JOUR
AU  - Rajković, Višeslava M.
AU  - Božić, Dušan
AU  - Jovanović, Milan T.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3889
AB  - High-energy milling was used for production of Cu-Al2O3 composites. The inert gas-atomized prealloyed copper powder containing 2 wt.%Al and the mixture of the different sized electrolytic copper powders with 4 wt.% commercial Al2O3 powders served as starting materials. Milling of prealloyed copper powders promotes formation of nano-sized Al2O3 particles by internal oxidation with oxygen from air. Hot-pressed compacts of composites obtained from 5 and 20 h milled powders were additionally subjected to the high-temperature exposure in argon at 800 degrees C for 1 and 5 h. Characterization of processed material was performed by optical and scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), microhardness, as well as density and electrical conductivity measurements. Due to nano-sized Al2O3 particles microhardness and thermal stability of composite processed from milled prealloyed powders are higher than corresponding properties of composites processed from the milled powder mixtures. The results were discussed in terms of the effects of different size of starting copper powders and Al2O3 particles on the structure, strengthening of copper matrix, thermal stability and electrical conductivity of Cu-Al2O3 composites. (C) 2009 Elsevier Ltd. All rights reserved.
T2  - Materials and Design
T1  - Effects of copper and Al2O3 particles on characteristics of Cu-Al2O3 composites
VL  - 31
IS  - 4
SP  - 1962
EP  - 1970
DO  - 10.1016/j.matdes.2009.10.037
ER  - 

@article{
author = "Rajković, Višeslava M. and Božić, Dušan and Jovanović, Milan T.",
year = "2010",
abstract = "High-energy milling was used for production of Cu-Al2O3 composites. The inert gas-atomized prealloyed copper powder containing 2 wt.%Al and the mixture of the different sized electrolytic copper powders with 4 wt.% commercial Al2O3 powders served as starting materials. Milling of prealloyed copper powders promotes formation of nano-sized Al2O3 particles by internal oxidation with oxygen from air. Hot-pressed compacts of composites obtained from 5 and 20 h milled powders were additionally subjected to the high-temperature exposure in argon at 800 degrees C for 1 and 5 h. Characterization of processed material was performed by optical and scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), microhardness, as well as density and electrical conductivity measurements. Due to nano-sized Al2O3 particles microhardness and thermal stability of composite processed from milled prealloyed powders are higher than corresponding properties of composites processed from the milled powder mixtures. The results were discussed in terms of the effects of different size of starting copper powders and Al2O3 particles on the structure, strengthening of copper matrix, thermal stability and electrical conductivity of Cu-Al2O3 composites. (C) 2009 Elsevier Ltd. All rights reserved.",
journal = "Materials and Design",
title = "Effects of copper and Al2O3 particles on characteristics of Cu-Al2O3 composites",
volume = "31",
number = "4",
pages = "1962-1970",
doi = "10.1016/j.matdes.2009.10.037"
}

Rajković, V. M., Božić, D.,& Jovanović, M. T.. (2010). Effects of copper and Al2O3 particles on characteristics of Cu-Al2O3 composites. in Materials and Design, 31(4), 1962-1970.
https://doi.org/10.1016/j.matdes.2009.10.037

Rajković VM, Božić D, Jovanović MT. Effects of copper and Al2O3 particles on characteristics of Cu-Al2O3 composites. in Materials and Design. 2010;31(4):1962-1970.
doi:10.1016/j.matdes.2009.10.037 .

Rajković, Višeslava M., Božić, Dušan, Jovanović, Milan T., "Effects of copper and Al2O3 particles on characteristics of Cu-Al2O3 composites" in Materials and Design, 31, no. 4 (2010):1962-1970,
https://doi.org/10.1016/j.matdes.2009.10.037 . .

TY  - JOUR
AU  - Rajković, Višeslava M.
AU  - Božić, Dušan
AU  - Jovanović, Milan T.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3976
AB  - Electrolytic copper powder, inert gas atomized prealloyed copper powder containing 3.5 wt.% Al, and a mixture of copper and commercial Al2O3 powder particles (4 wt.% Al2O3) were milled separately in a high-energy planetary ball mill for up to 20 h in air. The milling was performed in order to strengthen the copper matrix by grain size refinement and Al2O3 particles. Milling, in air of prealloyed copper powder promoted formation of fine dispersed Al2O3 particles by internal oxidation. Hot-pressing (800 degrees C for 3 h in argon at a pressure of 35 MPa) was used for compaction of milled powders. Compacts from 5 and 20 h milled powders were additionally subjected to high temperature exposure (800 degrees C for 1 and 5 h in argon) in order to examine their thermal stability and electrical conductivity. The effect of different size and the amount of Al2O3 particles on strengthening, thermal stability and electrical conductivity of the copper-based composites was studied. The results were discussed in terms of the effects of the grain size refinement along with micro- and nano-sized Al2O3 particles on the strengthening of the copper matrix.
T2  - International Journal of Materials Research
T1  - Properties of copper composites strengthened by nano- and micro-sized Al2O3 particles
VL  - 101
IS  - 3
SP  - 334
EP  - 339
DO  - 10.3139/146.110278
ER  - 

@article{
author = "Rajković, Višeslava M. and Božić, Dušan and Jovanović, Milan T.",
year = "2010",
abstract = "Electrolytic copper powder, inert gas atomized prealloyed copper powder containing 3.5 wt.% Al, and a mixture of copper and commercial Al2O3 powder particles (4 wt.% Al2O3) were milled separately in a high-energy planetary ball mill for up to 20 h in air. The milling was performed in order to strengthen the copper matrix by grain size refinement and Al2O3 particles. Milling, in air of prealloyed copper powder promoted formation of fine dispersed Al2O3 particles by internal oxidation. Hot-pressing (800 degrees C for 3 h in argon at a pressure of 35 MPa) was used for compaction of milled powders. Compacts from 5 and 20 h milled powders were additionally subjected to high temperature exposure (800 degrees C for 1 and 5 h in argon) in order to examine their thermal stability and electrical conductivity. The effect of different size and the amount of Al2O3 particles on strengthening, thermal stability and electrical conductivity of the copper-based composites was studied. The results were discussed in terms of the effects of the grain size refinement along with micro- and nano-sized Al2O3 particles on the strengthening of the copper matrix.",
journal = "International Journal of Materials Research",
title = "Properties of copper composites strengthened by nano- and micro-sized Al2O3 particles",
volume = "101",
number = "3",
pages = "334-339",
doi = "10.3139/146.110278"
}

Rajković, V. M., Božić, D.,& Jovanović, M. T.. (2010). Properties of copper composites strengthened by nano- and micro-sized Al2O3 particles. in International Journal of Materials Research, 101(3), 334-339.
https://doi.org/10.3139/146.110278

Rajković VM, Božić D, Jovanović MT. Properties of copper composites strengthened by nano- and micro-sized Al2O3 particles. in International Journal of Materials Research. 2010;101(3):334-339.
doi:10.3139/146.110278 .

Rajković, Višeslava M., Božić, Dušan, Jovanović, Milan T., "Properties of copper composites strengthened by nano- and micro-sized Al2O3 particles" in International Journal of Materials Research, 101, no. 3 (2010):334-339,
https://doi.org/10.3139/146.110278 . .

TY  - JOUR
AU  - Rajković, Višeslava M.
AU  - Božić, Dušan
AU  - Devečerski, Aleksandar
AU  - Bojanic, S.
AU  - Jovanović, Milan T.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4311
AB  - The objective of the work is to study the effects of the high-energy milling on strengthening, thermal stability and electrical conductivity of Cu-Al2O3 composite. The prealloyed copper powders, atomized in inert gas and containing 3 wt. % Al, were milled up to 20 h in the planetary ball mill to oxidize in situ aluminium with oxygen from the air. Composite compacts were obtained by hot-pressing in an argon atmosphere at 800 degrees C for 3 h under the pressure of 35 MPa. The microstructural characterization was performed by the optical microscope, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction analysis (XRD). The microhardness, electrical conductivity and density measurements were also carried out. The effect of internal oxidation and high-energy milling on strengthening of Cu-Al2O3 composite was significant, The increase of the microhardness of composite compacts (292 HV) is almost threefold comparing to compacts processed from the as-received Cu-3 wt. % Al powder (102 HV). The grain size of Cu-Al2O3 compacts processed from 5 and 20 h-milled powders was 75 and 45 nm, respectively. The small increase in the grain size and the small microhardness drop indicate the high thermal stability of Cu-Al2O3 composite during high-temperature exposure at 800 degrees C.
T2  - Revista de Metalurgia
T1  - Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation
VL  - 46
IS  - 6
SP  - 520
EP  - 529
DO  - 10.3989/revmetalmadrid.1024
ER  - 

@article{
author = "Rajković, Višeslava M. and Božić, Dušan and Devečerski, Aleksandar and Bojanic, S. and Jovanović, Milan T.",
year = "2010",
abstract = "The objective of the work is to study the effects of the high-energy milling on strengthening, thermal stability and electrical conductivity of Cu-Al2O3 composite. The prealloyed copper powders, atomized in inert gas and containing 3 wt. % Al, were milled up to 20 h in the planetary ball mill to oxidize in situ aluminium with oxygen from the air. Composite compacts were obtained by hot-pressing in an argon atmosphere at 800 degrees C for 3 h under the pressure of 35 MPa. The microstructural characterization was performed by the optical microscope, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction analysis (XRD). The microhardness, electrical conductivity and density measurements were also carried out. The effect of internal oxidation and high-energy milling on strengthening of Cu-Al2O3 composite was significant, The increase of the microhardness of composite compacts (292 HV) is almost threefold comparing to compacts processed from the as-received Cu-3 wt. % Al powder (102 HV). The grain size of Cu-Al2O3 compacts processed from 5 and 20 h-milled powders was 75 and 45 nm, respectively. The small increase in the grain size and the small microhardness drop indicate the high thermal stability of Cu-Al2O3 composite during high-temperature exposure at 800 degrees C.",
journal = "Revista de Metalurgia",
title = "Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation",
volume = "46",
number = "6",
pages = "520-529",
doi = "10.3989/revmetalmadrid.1024"
}

Rajković, V. M., Božić, D., Devečerski, A., Bojanic, S.,& Jovanović, M. T.. (2010). Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation. in Revista de Metalurgia, 46(6), 520-529.
https://doi.org/10.3989/revmetalmadrid.1024

Rajković VM, Božić D, Devečerski A, Bojanic S, Jovanović MT. Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation. in Revista de Metalurgia. 2010;46(6):520-529.
doi:10.3989/revmetalmadrid.1024 .

Rajković, Višeslava M., Božić, Dušan, Devečerski, Aleksandar, Bojanic, S., Jovanović, Milan T., "Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation" in Revista de Metalurgia, 46, no. 6 (2010):520-529,
https://doi.org/10.3989/revmetalmadrid.1024 . .

TY  - JOUR
AU  - Božić, Dušan
AU  - Dimčić, Biljana
AU  - Dimcic, O.
AU  - Stašić, Jelena
AU  - Rajković, Višeslava M.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3255
AB  - In the last 20 years a new class of metal matrix composite material (DRA - Discontinuously Reinforced Aluminum) with aluminum alloy matrix and Sic particles as secondary phase has been developed. The most important step during composite production is the homogenization process of metal and ceramic powder particles. Quantitative analysis of a SiC particles distribution in the aluminum alloy matrix (CW67) was used to determine the optimum homogenization parameters of different powders. It was found out that the level of mixture homogeneity largely depends on the amount of mixing dish filling, homogenization time and characteristics of reinforcing particles. By introducing the concept of homogeneity index, it was shown that the lowest values of the mentioned parameter correspond to the best uniformity of Sic particles in the CW67 matrix. Composite with the lowest value of homogeneity index was the one with 5 vol.% of SiC, homogenized during 60 min and the amount of mixing dish filling of 20 vol.%. This composite displayed the best values of mechanical properties and fracture resistance. (C) 2009 Elsevier Ltd. All rights reserved.
T2  - Materials and Design
T1  - Influence of SiC particles distribution on mechanical properties and fracture of DRA alloys
VL  - 31
IS  - 1
SP  - 134
EP  - 141
DO  - 10.1016/j.matdes.2009.06.047
ER  - 

@article{
author = "Božić, Dušan and Dimčić, Biljana and Dimcic, O. and Stašić, Jelena and Rajković, Višeslava M.",
year = "2010",
abstract = "In the last 20 years a new class of metal matrix composite material (DRA - Discontinuously Reinforced Aluminum) with aluminum alloy matrix and Sic particles as secondary phase has been developed. The most important step during composite production is the homogenization process of metal and ceramic powder particles. Quantitative analysis of a SiC particles distribution in the aluminum alloy matrix (CW67) was used to determine the optimum homogenization parameters of different powders. It was found out that the level of mixture homogeneity largely depends on the amount of mixing dish filling, homogenization time and characteristics of reinforcing particles. By introducing the concept of homogeneity index, it was shown that the lowest values of the mentioned parameter correspond to the best uniformity of Sic particles in the CW67 matrix. Composite with the lowest value of homogeneity index was the one with 5 vol.% of SiC, homogenized during 60 min and the amount of mixing dish filling of 20 vol.%. This composite displayed the best values of mechanical properties and fracture resistance. (C) 2009 Elsevier Ltd. All rights reserved.",
journal = "Materials and Design",
title = "Influence of SiC particles distribution on mechanical properties and fracture of DRA alloys",
volume = "31",
number = "1",
pages = "134-141",
doi = "10.1016/j.matdes.2009.06.047"
}

Božić, D., Dimčić, B., Dimcic, O., Stašić, J.,& Rajković, V. M.. (2010). Influence of SiC particles distribution on mechanical properties and fracture of DRA alloys. in Materials and Design, 31(1), 134-141.
https://doi.org/10.1016/j.matdes.2009.06.047

Božić D, Dimčić B, Dimcic O, Stašić J, Rajković VM. Influence of SiC particles distribution on mechanical properties and fracture of DRA alloys. in Materials and Design. 2010;31(1):134-141.
doi:10.1016/j.matdes.2009.06.047 .

Božić, Dušan, Dimčić, Biljana, Dimcic, O., Stašić, Jelena, Rajković, Višeslava M., "Influence of SiC particles distribution on mechanical properties and fracture of DRA alloys" in Materials and Design, 31, no. 1 (2010):134-141,
https://doi.org/10.1016/j.matdes.2009.06.047 . .

TY  - JOUR
AU  - Rajković, Višeslava M.
AU  - Božić, Dušan
AU  - Popović, Miljana
AU  - Jovanović, Milan T.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3260
AB  - Inert gas atomized prealloyed copper powder containing 2 wt.% Al (average particle size approximate to 30 mu m) and a mixture consisting of copper (average particle sizes approximate to 15 mu m and 30 mu m) and 4 wt.% of commercial Al2O3 powder particles (average particle size approximate to 0.75 mu m) were milled separately in a high-energy planetary ball mill up to 20 h in air. Milling was performed in order to strengthen the copper matrix by grain size refinement and Al2O3 particles. Milling in air of prealloyed copper powder promoted formation of finely dispersed nano-sized Al2O3 particles by internal oxidation. On the other side, composite powders with commercial micro-sized Al2O3 particles were obtained by mechanical alloying. Following milling, powders were treated in hydrogen at 400 degrees C for 1h in order to eliminate copper oxides formed on their surface during milling. Hot pressing (800 degrees C for 3 h in argon at pressure of 35 MPa) was used for compaction of milled powders. Hot pressed composite compacts processed from 5 and 20 h milled powders were additionally subjected to high temperature exposure (800 degrees C for 1 and 5 h in argon) in order to examine their thermal stability. The results were discussed in terms of the effects of different size of starting powders, the grain size refinement and different size of Al2O3 particles on strengthening, thermal stability and electrical conductivity of copper-based composites.
T2  - Science of Sintering
T1  - The Influence of Powder Particle Size on Properties of Cu-Al2O3 Composites
VL  - 41
IS  - 2
SP  - 185
EP  - 192
DO  - 10.2298/SOS0902185R
ER  - 

@article{
author = "Rajković, Višeslava M. and Božić, Dušan and Popović, Miljana and Jovanović, Milan T.",
year = "2009",
abstract = "Inert gas atomized prealloyed copper powder containing 2 wt.% Al (average particle size approximate to 30 mu m) and a mixture consisting of copper (average particle sizes approximate to 15 mu m and 30 mu m) and 4 wt.% of commercial Al2O3 powder particles (average particle size approximate to 0.75 mu m) were milled separately in a high-energy planetary ball mill up to 20 h in air. Milling was performed in order to strengthen the copper matrix by grain size refinement and Al2O3 particles. Milling in air of prealloyed copper powder promoted formation of finely dispersed nano-sized Al2O3 particles by internal oxidation. On the other side, composite powders with commercial micro-sized Al2O3 particles were obtained by mechanical alloying. Following milling, powders were treated in hydrogen at 400 degrees C for 1h in order to eliminate copper oxides formed on their surface during milling. Hot pressing (800 degrees C for 3 h in argon at pressure of 35 MPa) was used for compaction of milled powders. Hot pressed composite compacts processed from 5 and 20 h milled powders were additionally subjected to high temperature exposure (800 degrees C for 1 and 5 h in argon) in order to examine their thermal stability. The results were discussed in terms of the effects of different size of starting powders, the grain size refinement and different size of Al2O3 particles on strengthening, thermal stability and electrical conductivity of copper-based composites.",
journal = "Science of Sintering",
title = "The Influence of Powder Particle Size on Properties of Cu-Al2O3 Composites",
volume = "41",
number = "2",
pages = "185-192",
doi = "10.2298/SOS0902185R"
}

Rajković, V. M., Božić, D., Popović, M.,& Jovanović, M. T.. (2009). The Influence of Powder Particle Size on Properties of Cu-Al2O3 Composites. in Science of Sintering, 41(2), 185-192.
https://doi.org/10.2298/SOS0902185R

Rajković VM, Božić D, Popović M, Jovanović MT. The Influence of Powder Particle Size on Properties of Cu-Al2O3 Composites. in Science of Sintering. 2009;41(2):185-192.
doi:10.2298/SOS0902185R .

Rajković, Višeslava M., Božić, Dušan, Popović, Miljana, Jovanović, Milan T., "The Influence of Powder Particle Size on Properties of Cu-Al2O3 Composites" in Science of Sintering, 41, no. 2 (2009):185-192,
https://doi.org/10.2298/SOS0902185R . .

TY  - JOUR
AU  - Matović, Branko
AU  - Novaković, Nikola
AU  - Kurko, Sandra V.
AU  - Šiljegović, Milorad
AU  - Kačarević-Popović, Zorica M.
AU  - Romčević, Nebojša Ž.
AU  - Ivanović, Nenad
AU  - Grbović-Novaković, Jasmina
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3793
AB  - MgH(2) powder samples have been irradiated with 120 keV Ar(+8) ions with different ion fluencies ranging from 10(12) to 10(16) ions/cm(2). irradiation effects are estimated by SRIM calculations, and investigated experimentally using Raman spectroscopy and X-ray diffraction (XRD) analysis. The observed changes of structure and vibrational spectra are elaborated, their consequences on hydrogen bonding in MgH(2) discussed, and influence on H-desorption properties investigated by Temperature Programmed Desorption (TPD) and Differential Scanning Calorimetry (DSC) techniques. it has been established that near-surface defects have a predominant influence on decreasing the H-desorption temperature. Variations of Raman, TPD and DSC spectra with irradiation conditions suggest that there are several mechanisms of dehydriding, and that they depend on defect concentration, interaction and ordering. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Structural destabilisation of MgH(2) obtained by heavy ion irradiation
VL  - 34
IS  - 17
SP  - 7275
EP  - 7282
DO  - 10.1016/j.ijhydene.2009.06.081
ER  - 

@article{
author = "Matović, Branko and Novaković, Nikola and Kurko, Sandra V. and Šiljegović, Milorad and Kačarević-Popović, Zorica M. and Romčević, Nebojša Ž. and Ivanović, Nenad and Grbović-Novaković, Jasmina",
year = "2009",
abstract = "MgH(2) powder samples have been irradiated with 120 keV Ar(+8) ions with different ion fluencies ranging from 10(12) to 10(16) ions/cm(2). irradiation effects are estimated by SRIM calculations, and investigated experimentally using Raman spectroscopy and X-ray diffraction (XRD) analysis. The observed changes of structure and vibrational spectra are elaborated, their consequences on hydrogen bonding in MgH(2) discussed, and influence on H-desorption properties investigated by Temperature Programmed Desorption (TPD) and Differential Scanning Calorimetry (DSC) techniques. it has been established that near-surface defects have a predominant influence on decreasing the H-desorption temperature. Variations of Raman, TPD and DSC spectra with irradiation conditions suggest that there are several mechanisms of dehydriding, and that they depend on defect concentration, interaction and ordering. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Structural destabilisation of MgH(2) obtained by heavy ion irradiation",
volume = "34",
number = "17",
pages = "7275-7282",
doi = "10.1016/j.ijhydene.2009.06.081"
}

Matović, B., Novaković, N., Kurko, S. V., Šiljegović, M., Kačarević-Popović, Z. M., Romčević, N. Ž., Ivanović, N.,& Grbović-Novaković, J.. (2009). Structural destabilisation of MgH(2) obtained by heavy ion irradiation. in International Journal of Hydrogen Energy, 34(17), 7275-7282.
https://doi.org/10.1016/j.ijhydene.2009.06.081

Matović B, Novaković N, Kurko SV, Šiljegović M, Kačarević-Popović ZM, Romčević NŽ, Ivanović N, Grbović-Novaković J. Structural destabilisation of MgH(2) obtained by heavy ion irradiation. in International Journal of Hydrogen Energy. 2009;34(17):7275-7282.
doi:10.1016/j.ijhydene.2009.06.081 .

Matović, Branko, Novaković, Nikola, Kurko, Sandra V., Šiljegović, Milorad, Kačarević-Popović, Zorica M., Romčević, Nebojša Ž., Ivanović, Nenad, Grbović-Novaković, Jasmina, "Structural destabilisation of MgH(2) obtained by heavy ion irradiation" in International Journal of Hydrogen Energy, 34, no. 17 (2009):7275-7282,
https://doi.org/10.1016/j.ijhydene.2009.06.081 . .

TY  - JOUR
AU  - Božić, Dušan
AU  - Cvijović-Alagić, Ivana
AU  - Dimčić, Biljana
AU  - Stašić, Jelena
AU  - Rajković, Višeslava M.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3258
AB  - In order to produce the composite powder analyzed in this paper, two prealloys were melted and afterwards gas atomized. The obtained TiB2-reinforced copper powder was consolidated by hot isostatic pressing (HIP). Since it is known that a decrease in the size of the reinforcing phase can cause an increase in hardness of composites, the main aim of the experimental work was to obtain as small particles of the dispersed phase as possible by using standard powder metallurgy techniques. Microstructure and microhardness of the as-cast prealloys, as-atomized powder and HIP-ed compacts were examined. The results of these examinations revealed that TiB2 particles about 10 nm in size were in-situ formed and homogenously dispersed in the copper matrix. As a consequence of the TiB2 formation, the microhardness of Cu-TiB2 composite was significantly improved.
T2  - Science of Sintering
T1  - In-situ Processing of TiB2 Nanoparticle-Reinforced Copper Matrix Composites
VL  - 41
IS  - 2
SP  - 143
EP  - 150
DO  - 10.2298/SOS0902143B
ER  - 

@article{
author = "Božić, Dušan and Cvijović-Alagić, Ivana and Dimčić, Biljana and Stašić, Jelena and Rajković, Višeslava M.",
year = "2009",
abstract = "In order to produce the composite powder analyzed in this paper, two prealloys were melted and afterwards gas atomized. The obtained TiB2-reinforced copper powder was consolidated by hot isostatic pressing (HIP). Since it is known that a decrease in the size of the reinforcing phase can cause an increase in hardness of composites, the main aim of the experimental work was to obtain as small particles of the dispersed phase as possible by using standard powder metallurgy techniques. Microstructure and microhardness of the as-cast prealloys, as-atomized powder and HIP-ed compacts were examined. The results of these examinations revealed that TiB2 particles about 10 nm in size were in-situ formed and homogenously dispersed in the copper matrix. As a consequence of the TiB2 formation, the microhardness of Cu-TiB2 composite was significantly improved.",
journal = "Science of Sintering",
title = "In-situ Processing of TiB2 Nanoparticle-Reinforced Copper Matrix Composites",
volume = "41",
number = "2",
pages = "143-150",
doi = "10.2298/SOS0902143B"
}

Božić, D., Cvijović-Alagić, I., Dimčić, B., Stašić, J.,& Rajković, V. M.. (2009). In-situ Processing of TiB2 Nanoparticle-Reinforced Copper Matrix Composites. in Science of Sintering, 41(2), 143-150.
https://doi.org/10.2298/SOS0902143B

Božić D, Cvijović-Alagić I, Dimčić B, Stašić J, Rajković VM. In-situ Processing of TiB2 Nanoparticle-Reinforced Copper Matrix Composites. in Science of Sintering. 2009;41(2):143-150.
doi:10.2298/SOS0902143B .

Božić, Dušan, Cvijović-Alagić, Ivana, Dimčić, Biljana, Stašić, Jelena, Rajković, Višeslava M., "In-situ Processing of TiB2 Nanoparticle-Reinforced Copper Matrix Composites" in Science of Sintering, 41, no. 2 (2009):143-150,
https://doi.org/10.2298/SOS0902143B . .

TY  - JOUR
AU  - Rajković, Višeslava M.
AU  - Božić, Dušan
AU  - Jovanović, Milan T.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3716
AB  - The powder Cu-Al2O3 composites were produced by high-energy milling. Various combinations of particle size and mixtures and approximately constant amount of Al2O3 were used as the starting materials. These powders were separately milled in air for up to 20 h in a planetary ball mill. The copper matrix was reinforced by internal oxidation and mechanical alloying. During the milling, internal oxidation of pre-alloyed Cu-2 mass %-Al powder generated 3.7 mass % Al2O3 nano-sized particles finely dispersed in the copper matrix. The effect of different size of the starting copper and Al2O3 powder particles on the lattice parameter, lattice distortion and grain size, as well as on the size, morphology and microstructure of the Cu-Al2O3 composite powder particles was studied.
T2  - Journal of the Serbian Chemical Society
T1  - Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling
VL  - 74
IS  - 5
SP  - 595
EP  - 605
DO  - 10.2298/JSC0905595R
ER  - 

@article{
author = "Rajković, Višeslava M. and Božić, Dušan and Jovanović, Milan T.",
year = "2009",
abstract = "The powder Cu-Al2O3 composites were produced by high-energy milling. Various combinations of particle size and mixtures and approximately constant amount of Al2O3 were used as the starting materials. These powders were separately milled in air for up to 20 h in a planetary ball mill. The copper matrix was reinforced by internal oxidation and mechanical alloying. During the milling, internal oxidation of pre-alloyed Cu-2 mass %-Al powder generated 3.7 mass % Al2O3 nano-sized particles finely dispersed in the copper matrix. The effect of different size of the starting copper and Al2O3 powder particles on the lattice parameter, lattice distortion and grain size, as well as on the size, morphology and microstructure of the Cu-Al2O3 composite powder particles was studied.",
journal = "Journal of the Serbian Chemical Society",
title = "Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling",
volume = "74",
number = "5",
pages = "595-605",
doi = "10.2298/JSC0905595R"
}

Rajković, V. M., Božić, D.,& Jovanović, M. T.. (2009). Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling. in Journal of the Serbian Chemical Society, 74(5), 595-605.
https://doi.org/10.2298/JSC0905595R

Rajković VM, Božić D, Jovanović MT. Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling. in Journal of the Serbian Chemical Society. 2009;74(5):595-605.
doi:10.2298/JSC0905595R .

Rajković, Višeslava M., Božić, Dušan, Jovanović, Milan T., "Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling" in Journal of the Serbian Chemical Society, 74, no. 5 (2009):595-605,
https://doi.org/10.2298/JSC0905595R . .

TY  - JOUR
AU  - Božić, Dušan
AU  - Dimcic, O.
AU  - Dimčić, Biljana
AU  - Vilotijević, Miroljub N.
AU  - Riznic-Dimitrijevic, S.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3846
AB  - It is a well known fact that behavior of materials during consolidation at high temperatures is a very complex issue. Each mechanism that promotes densification, depends on a large number of parameters in many different ways, making the development of the densification process very difficult to plan. For that reason, any kind of model which could encompass large number of the influencing parameters would be a great contribution for easier planning and handling of the densification process. Modeling of densification process based on the papers of well-known authors, including a new appropriate modifications is presented in this work. Importance of this model is that it can be applicable to composite materials. This new model was tested on a real Al-SiC composite systems (Al-10 vol.% SiC, Al-30 vol.% SiC and Al-50 vol.% SiC). Predicted behavior of composites obtained by model calculations and the one defined through the experiments concur in the 7-30% range. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Modeling of densification process for particle reinforced composites
VL  - 487
IS  - 1-2
SP  - 511
EP  - 516
DO  - 10.1016/j.jallcom.2009.08.003
ER  - 

@article{
author = "Božić, Dušan and Dimcic, O. and Dimčić, Biljana and Vilotijević, Miroljub N. and Riznic-Dimitrijevic, S.",
year = "2009",
abstract = "It is a well known fact that behavior of materials during consolidation at high temperatures is a very complex issue. Each mechanism that promotes densification, depends on a large number of parameters in many different ways, making the development of the densification process very difficult to plan. For that reason, any kind of model which could encompass large number of the influencing parameters would be a great contribution for easier planning and handling of the densification process. Modeling of densification process based on the papers of well-known authors, including a new appropriate modifications is presented in this work. Importance of this model is that it can be applicable to composite materials. This new model was tested on a real Al-SiC composite systems (Al-10 vol.% SiC, Al-30 vol.% SiC and Al-50 vol.% SiC). Predicted behavior of composites obtained by model calculations and the one defined through the experiments concur in the 7-30% range. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Modeling of densification process for particle reinforced composites",
volume = "487",
number = "1-2",
pages = "511-516",
doi = "10.1016/j.jallcom.2009.08.003"
}

Božić, D., Dimcic, O., Dimčić, B., Vilotijević, M. N.,& Riznic-Dimitrijevic, S.. (2009). Modeling of densification process for particle reinforced composites. in Journal of Alloys and Compounds, 487(1-2), 511-516.
https://doi.org/10.1016/j.jallcom.2009.08.003

Božić D, Dimcic O, Dimčić B, Vilotijević MN, Riznic-Dimitrijevic S. Modeling of densification process for particle reinforced composites. in Journal of Alloys and Compounds. 2009;487(1-2):511-516.
doi:10.1016/j.jallcom.2009.08.003 .

Božić, Dušan, Dimcic, O., Dimčić, Biljana, Vilotijević, Miroljub N., Riznic-Dimitrijevic, S., "Modeling of densification process for particle reinforced composites" in Journal of Alloys and Compounds, 487, no. 1-2 (2009):511-516,
https://doi.org/10.1016/j.jallcom.2009.08.003 . .

TY  - JOUR
AU  - Božić, Dušan
AU  - Sekulić, Danijela R.
AU  - Stašić, Jelena
AU  - Rajković, Višeslava M.
AU  - Jovanović, Milan T.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3587
AB  - Low cost titanium alloy compacts were produced via the powder metallurgy approach through the hydride-dehydride process and hot consolidation (hot pressing and hot isostatic pressing). The conditions of the reversible hydride-dehydride process were determined by X-ray and scanning electron microscopy characterisation of powders. Powders were consolidated both above and below the beta transformation temperature. The morphology of the microstructure, and the presence of open and closed pores, its well as residual particles of hydrides and oxides have a direct influence on the mechanical properties of compacts (tensile properties and impact toughness).
T2  - International Journal of Materials Research
T1  - The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy
VL  - 99
IS  - 11
SP  - 1268
EP  - 1274
DO  - 10.3139/146.101762
ER  - 

@article{
author = "Božić, Dušan and Sekulić, Danijela R. and Stašić, Jelena and Rajković, Višeslava M. and Jovanović, Milan T.",
year = "2008",
abstract = "Low cost titanium alloy compacts were produced via the powder metallurgy approach through the hydride-dehydride process and hot consolidation (hot pressing and hot isostatic pressing). The conditions of the reversible hydride-dehydride process were determined by X-ray and scanning electron microscopy characterisation of powders. Powders were consolidated both above and below the beta transformation temperature. The morphology of the microstructure, and the presence of open and closed pores, its well as residual particles of hydrides and oxides have a direct influence on the mechanical properties of compacts (tensile properties and impact toughness).",
journal = "International Journal of Materials Research",
title = "The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy",
volume = "99",
number = "11",
pages = "1268-1274",
doi = "10.3139/146.101762"
}

Božić, D., Sekulić, D. R., Stašić, J., Rajković, V. M.,& Jovanović, M. T.. (2008). The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy. in International Journal of Materials Research, 99(11), 1268-1274.
https://doi.org/10.3139/146.101762

Božić D, Sekulić DR, Stašić J, Rajković VM, Jovanović MT. The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy. in International Journal of Materials Research. 2008;99(11):1268-1274.
doi:10.3139/146.101762 .

Božić, Dušan, Sekulić, Danijela R., Stašić, Jelena, Rajković, Višeslava M., Jovanović, Milan T., "The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy" in International Journal of Materials Research, 99, no. 11 (2008):1268-1274,
https://doi.org/10.3139/146.101762 . .

TY  - JOUR
AU  - Milovanović, S.
AU  - Matović, Ljiljana
AU  - Drvendzija, M.
AU  - Grbović-Novaković, Jasmina
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3574
AB  - To investigate the effects of specific porous microstructure of diatomite on the hydrogen storage properties of MgH(2), a two-step preparation was carried out. The first step was decrepitation of MgH(2) particle size during 10 h of milling. The second step was additional 1 h of milling with diatomite. The microstructure and phase composition of materials was characterized by X-ray diffraction, whereas the powder morphology and degree of additive dispersion were analyzed by scanning electron microscopy. The hydrogen desorption behaviour of nanocomposites was investigated by differential scanning calorimetry. The results show that addition of porous diatomite structure leads to decrease in desorption temperature, since there was no other effect that can have an influence on kinetics, such as formation of the metastable gamma-phase, reduction of oxides to the native metal and/or homogeneous dispersion of the catalyst. This indicates that the microstructure of added material plays the main role in the enhancement of desorption properties of composites.
T2  - Journal of Microscopy, Oxford
T1  - Hydrogen storage properties of MgH(2)-diatomite composites obtained by high-energy ball milling
VL  - 232
IS  - 3
SP  - 522
EP  - 525
DO  - 10.1111/j.1365-2818.2008.02113.x
ER  - 

@article{
author = "Milovanović, S. and Matović, Ljiljana and Drvendzija, M. and Grbović-Novaković, Jasmina",
year = "2008",
abstract = "To investigate the effects of specific porous microstructure of diatomite on the hydrogen storage properties of MgH(2), a two-step preparation was carried out. The first step was decrepitation of MgH(2) particle size during 10 h of milling. The second step was additional 1 h of milling with diatomite. The microstructure and phase composition of materials was characterized by X-ray diffraction, whereas the powder morphology and degree of additive dispersion were analyzed by scanning electron microscopy. The hydrogen desorption behaviour of nanocomposites was investigated by differential scanning calorimetry. The results show that addition of porous diatomite structure leads to decrease in desorption temperature, since there was no other effect that can have an influence on kinetics, such as formation of the metastable gamma-phase, reduction of oxides to the native metal and/or homogeneous dispersion of the catalyst. This indicates that the microstructure of added material plays the main role in the enhancement of desorption properties of composites.",
journal = "Journal of Microscopy, Oxford",
title = "Hydrogen storage properties of MgH(2)-diatomite composites obtained by high-energy ball milling",
volume = "232",
number = "3",
pages = "522-525",
doi = "10.1111/j.1365-2818.2008.02113.x"
}

Milovanović, S., Matović, L., Drvendzija, M.,& Grbović-Novaković, J.. (2008). Hydrogen storage properties of MgH(2)-diatomite composites obtained by high-energy ball milling. in Journal of Microscopy, Oxford, 232(3), 522-525.
https://doi.org/10.1111/j.1365-2818.2008.02113.x

Milovanović S, Matović L, Drvendzija M, Grbović-Novaković J. Hydrogen storage properties of MgH(2)-diatomite composites obtained by high-energy ball milling. in Journal of Microscopy, Oxford. 2008;232(3):522-525.
doi:10.1111/j.1365-2818.2008.02113.x .

Milovanović, S., Matović, Ljiljana, Drvendzija, M., Grbović-Novaković, Jasmina, "Hydrogen storage properties of MgH(2)-diatomite composites obtained by high-energy ball milling" in Journal of Microscopy, Oxford, 232, no. 3 (2008):522-525,
https://doi.org/10.1111/j.1365-2818.2008.02113.x . .

TY  - CONF
AU  - Grbović, Jasmina
AU  - Matović, Branko
AU  - Milovanović, S.
AU  - Andrić, V.
AU  - Umićević, Ana
AU  - Cekić, Božidar
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12515
AB  - Despite its high cost, hafnium has been gaining wider acceptance in modern technologies. Owing to its refractory properties combined with high solubility and its positive effect on heat resistance, hafnium has been used as a component of a number of new construction materials containing d elements. Recently, the serial of intermetallic compounds formed between Hf M (M = V, Cr, Mn, Fe, Co, Ni, Cu)  have been investigated as systems interesting for hydrogen storage [1,2], able to form hydrides in hydrogen-tometal atom ratios H/M  1 at rather low temperatures (T  3000 C) and pressures or as permanent magnets [3]. In this paper, we present a study on structural properties and compound formation in the CoHf systems. The microstructure of the powders was characterized by X-ray XRD with a Siemens KRISTALOFLEKX D-500, equipped with Cu-K Ni filtrated radiation. Morphological and microanalytical characterization was carried out by SEM with a Cambridge 250 MKIII and EDS microanalysis. EDXRF measurements were performed on the EDXRF spectrometer (Canberra) with a Si(Li) semiconductor detector and annular radioisotope excitation source 109Cd. All samples were measured for a period of 22500 s under the same experimental conditions on the sample holders made of Teflon rings and Mylar foil. To obtain HfCo, HfCo3 and HfCo6, the proper amount of constituent elements were arcmelting several times in purified argon atmosphere. Since there is no JSPDS data about HfCo3, size of the unit cell is deduced from the angular positions of the diffraction lines. An assumption is made on the basis of cubic crystal system. Pattern indexing was done by means of a slide rule and the correct Miller indices are assigned to each reflection. It was found that two phases are present with the same HfCo3 composition belonging to the different space groups (215 and 204) with the different lattice edges ao1 = 5.58 Å and ao2 = 4.17 Å, respectively. By EDXRF spectrometry it was observed that Hf:Co ratio in HfCo3 is 1:3 and in Hf:Co  1:1. SEM images also confirmed the XRD and EDXRF observations. One can see that samples a) HfCo3 and b) HfCo are homogenous, while in the sample c) on the porous HfCo6 phase (dark field), there are grains of   HfCo phase (bright fields).           Further investigation involving TDPAC and SQUID technique, regarding local measurements of hyperfine fields and their magnetic properties, as well as ab-initio calculations of the electronic structure are planed in order to give a dipper insight into structure and hydriding behavior of material.
PB  - Prague : Czechoslovak Microscopy Society
C3  - 8th Multinational congress on microscopy : Proceedings
T1  - Synthesis and Characterization of Hf-Co Intermetallic Compounds
SP  - 253
EP  - 254
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12515
ER  - 

@conference{
author = "Grbović, Jasmina and Matović, Branko and Milovanović, S. and Andrić, V. and Umićević, Ana and Cekić, Božidar",
year = "2007",
abstract = "Despite its high cost, hafnium has been gaining wider acceptance in modern technologies. Owing to its refractory properties combined with high solubility and its positive effect on heat resistance, hafnium has been used as a component of a number of new construction materials containing d elements. Recently, the serial of intermetallic compounds formed between Hf M (M = V, Cr, Mn, Fe, Co, Ni, Cu)  have been investigated as systems interesting for hydrogen storage [1,2], able to form hydrides in hydrogen-tometal atom ratios H/M  1 at rather low temperatures (T  3000 C) and pressures or as permanent magnets [3]. In this paper, we present a study on structural properties and compound formation in the CoHf systems. The microstructure of the powders was characterized by X-ray XRD with a Siemens KRISTALOFLEKX D-500, equipped with Cu-K Ni filtrated radiation. Morphological and microanalytical characterization was carried out by SEM with a Cambridge 250 MKIII and EDS microanalysis. EDXRF measurements were performed on the EDXRF spectrometer (Canberra) with a Si(Li) semiconductor detector and annular radioisotope excitation source 109Cd. All samples were measured for a period of 22500 s under the same experimental conditions on the sample holders made of Teflon rings and Mylar foil. To obtain HfCo, HfCo3 and HfCo6, the proper amount of constituent elements were arcmelting several times in purified argon atmosphere. Since there is no JSPDS data about HfCo3, size of the unit cell is deduced from the angular positions of the diffraction lines. An assumption is made on the basis of cubic crystal system. Pattern indexing was done by means of a slide rule and the correct Miller indices are assigned to each reflection. It was found that two phases are present with the same HfCo3 composition belonging to the different space groups (215 and 204) with the different lattice edges ao1 = 5.58 Å and ao2 = 4.17 Å, respectively. By EDXRF spectrometry it was observed that Hf:Co ratio in HfCo3 is 1:3 and in Hf:Co  1:1. SEM images also confirmed the XRD and EDXRF observations. One can see that samples a) HfCo3 and b) HfCo are homogenous, while in the sample c) on the porous HfCo6 phase (dark field), there are grains of   HfCo phase (bright fields).           Further investigation involving TDPAC and SQUID technique, regarding local measurements of hyperfine fields and their magnetic properties, as well as ab-initio calculations of the electronic structure are planed in order to give a dipper insight into structure and hydriding behavior of material.",
publisher = "Prague : Czechoslovak Microscopy Society",
journal = "8th Multinational congress on microscopy : Proceedings",
title = "Synthesis and Characterization of Hf-Co Intermetallic Compounds",
pages = "253-254",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12515"
}

Grbović, J., Matović, B., Milovanović, S., Andrić, V., Umićević, A.,& Cekić, B.. (2007). Synthesis and Characterization of Hf-Co Intermetallic Compounds. in 8th Multinational congress on microscopy : Proceedings
Prague : Czechoslovak Microscopy Society., 253-254.
https://hdl.handle.net/21.15107/rcub_vinar_12515

Grbović J, Matović B, Milovanović S, Andrić V, Umićević A, Cekić B. Synthesis and Characterization of Hf-Co Intermetallic Compounds. in 8th Multinational congress on microscopy : Proceedings. 2007;:253-254.
https://hdl.handle.net/21.15107/rcub_vinar_12515 .

Grbović, Jasmina, Matović, Branko, Milovanović, S., Andrić, V., Umićević, Ana, Cekić, Božidar, "Synthesis and Characterization of Hf-Co Intermetallic Compounds" in 8th Multinational congress on microscopy : Proceedings (2007):253-254,
https://hdl.handle.net/21.15107/rcub_vinar_12515 .

TY  - JOUR
AU  - Umićević, Ana
AU  - Mahnke, Heinz-Eberhard
AU  - Cekić, Božidar Đ.
AU  - Grbović, Jasmina
AU  - Koteski, Vasil J.
AU  - Belošević-Čavor, Jelena
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6610
AB  - The alloying and phase formation in Ni-Hf samples with 0.2-, 2-, and 5-at.% Hf were studied by X-ray diffraction (XRD) technique and scanning electron microscopy (SEM). Both characterization methods, XRD and SEM, reveal the presence of the HfNi5 phase (fee structure) where the excess Ni atoms are present in the form of Ni or Ni-rich segregations in the sample containing 5-at.% Hf. The sample with 2-at.% Hf is characterized by the presence of the two phases present in the 5-at.% sample and by Hf atoms, which occupy substitutional lattice positions in the Ni lattice. Finally, in the third sample with 0.2-at.% Hf, the Hf atoms mainly substitute the Ni atoms in the lattice. This analysis is being complemented with additional information on the local structure around Hf by extended X-ray absorption fine structure spectroscopy (EXAFS).
T2  - Materials Science Forum
T1  - SEM and XRD characterization of Ni-Hf alloys at low Hf concentration
VL  - 518
SP  - 325
EP  - 330
DO  - 10.4028/www.scientific.net/msf.518.325
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6610
ER  - 

@article{
author = "Umićević, Ana and Mahnke, Heinz-Eberhard and Cekić, Božidar Đ. and Grbović, Jasmina and Koteski, Vasil J. and Belošević-Čavor, Jelena",
year = "2006",
abstract = "The alloying and phase formation in Ni-Hf samples with 0.2-, 2-, and 5-at.% Hf were studied by X-ray diffraction (XRD) technique and scanning electron microscopy (SEM). Both characterization methods, XRD and SEM, reveal the presence of the HfNi5 phase (fee structure) where the excess Ni atoms are present in the form of Ni or Ni-rich segregations in the sample containing 5-at.% Hf. The sample with 2-at.% Hf is characterized by the presence of the two phases present in the 5-at.% sample and by Hf atoms, which occupy substitutional lattice positions in the Ni lattice. Finally, in the third sample with 0.2-at.% Hf, the Hf atoms mainly substitute the Ni atoms in the lattice. This analysis is being complemented with additional information on the local structure around Hf by extended X-ray absorption fine structure spectroscopy (EXAFS).",
journal = "Materials Science Forum",
title = "SEM and XRD characterization of Ni-Hf alloys at low Hf concentration",
volume = "518",
pages = "325-330",
doi = "10.4028/www.scientific.net/msf.518.325",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6610"
}

Umićević, A., Mahnke, H., Cekić, B. Đ., Grbović, J., Koteski, V. J.,& Belošević-Čavor, J.. (2006). SEM and XRD characterization of Ni-Hf alloys at low Hf concentration. in Materials Science Forum, 518, 325-330.
https://doi.org/10.4028/www.scientific.net/msf.518.325
https://hdl.handle.net/21.15107/rcub_vinar_6610

Umićević A, Mahnke H, Cekić BĐ, Grbović J, Koteski VJ, Belošević-Čavor J. SEM and XRD characterization of Ni-Hf alloys at low Hf concentration. in Materials Science Forum. 2006;518:325-330.
doi:10.4028/www.scientific.net/msf.518.325
https://hdl.handle.net/21.15107/rcub_vinar_6610 .

Umićević, Ana, Mahnke, Heinz-Eberhard, Cekić, Božidar Đ., Grbović, Jasmina, Koteski, Vasil J., Belošević-Čavor, Jelena, "SEM and XRD characterization of Ni-Hf alloys at low Hf concentration" in Materials Science Forum, 518 (2006):325-330,
https://doi.org/10.4028/www.scientific.net/msf.518.325 .,
https://hdl.handle.net/21.15107/rcub_vinar_6610 .

TY  - CONF
AU  - Brdarić, Tanja
AU  - Grbović-Novaković, Jasmina
AU  - Novaković, Nikola
AU  - Mentus, Slavko V.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9448
AB  - In order to obtain faster hydrogen sorption kinetics, MgH2-Ti nanocomposites were prepared by high-energy ball milling, under Ar using 10:1 ball to powder ratio and 10% of catalyst. Microstructural and morphological characterization, performed by XRD and optical microscopy analysis, show a correlation with thermal stability and hydrogen desorption properties investigated by DTA. In order to obtain deeper insight into bonding mechanisms of Ti in MgH2 fully relaxed structure, we have performed ab initio electronic structure calculations of MgH2 + Ti system, using Full Potential Linearized Augmented Plane Wave method, as implemented in WIEN2K code.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry
T1  - The study of nanodispersed composite MgH2-Ti: experiment and theory
SP  - 501
EP  - 503
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9448
ER  - 

@conference{
author = "Brdarić, Tanja and Grbović-Novaković, Jasmina and Novaković, Nikola and Mentus, Slavko V.",
year = "2006",
abstract = "In order to obtain faster hydrogen sorption kinetics, MgH2-Ti nanocomposites were prepared by high-energy ball milling, under Ar using 10:1 ball to powder ratio and 10% of catalyst. Microstructural and morphological characterization, performed by XRD and optical microscopy analysis, show a correlation with thermal stability and hydrogen desorption properties investigated by DTA. In order to obtain deeper insight into bonding mechanisms of Ti in MgH2 fully relaxed structure, we have performed ab initio electronic structure calculations of MgH2 + Ti system, using Full Potential Linearized Augmented Plane Wave method, as implemented in WIEN2K code.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry",
title = "The study of nanodispersed composite MgH2-Ti: experiment and theory",
pages = "501-503",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9448"
}

Brdarić, T., Grbović-Novaković, J., Novaković, N.,& Mentus, S. V.. (2006). The study of nanodispersed composite MgH2-Ti: experiment and theory. in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry
Society of Physical Chemists of Serbia., 501-503.
https://hdl.handle.net/21.15107/rcub_vinar_9448

Brdarić T, Grbović-Novaković J, Novaković N, Mentus SV. The study of nanodispersed composite MgH2-Ti: experiment and theory. in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry. 2006;:501-503.
https://hdl.handle.net/21.15107/rcub_vinar_9448 .

Brdarić, Tanja, Grbović-Novaković, Jasmina, Novaković, Nikola, Mentus, Slavko V., "The study of nanodispersed composite MgH2-Ti: experiment and theory" in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry (2006):501-503,
https://hdl.handle.net/21.15107/rcub_vinar_9448 .

TY  - JOUR
AU  - Božić, Dušan
AU  - Cvijović, Ivana
AU  - Vilotijević, Miroljub N.
AU  - Jovanović, Milan T.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3124
AB  - The influence of hot-pressing (HP-ing) parameters on the microstructure, tensile properties and impact toughness of Ti6Al4V alloy produced by the powder metallurgy (PM) technique was evaluated. The experimental results show that variations in the microstructural morphology and residual porosity play an important role in affecting the mechanical properties of this alloy. The lamellar microstructure with a higher density, obtained by HP-ing above the beta-transition temperature (T-beta), was found to exibit a higher tensile strenght and toughness than the globular microstructure produced below T-beta. Although both types of microstructure show a mixed fracture, the ductile mode was more pronounced in the case of the fully lamellar microstructure. By controlling the HP-ing pressure and duration time, the globular microstructure, with lower porosity, improved tensile strength and ductility in combination with a better resistance to crack initation and propagation, can be obtained.
T2  - Journal of the Serbian Chemical Society
T1  - The influence of microstructural characteristics on the mechanical properties of Ti6Al4V alloy produced by the powder metallurgy technique
VL  - 71
IS  - 8-9
SP  - 985
EP  - 992
DO  - 10.2298/JSC0609985B
ER  - 

@article{
author = "Božić, Dušan and Cvijović, Ivana and Vilotijević, Miroljub N. and Jovanović, Milan T.",
year = "2006",
abstract = "The influence of hot-pressing (HP-ing) parameters on the microstructure, tensile properties and impact toughness of Ti6Al4V alloy produced by the powder metallurgy (PM) technique was evaluated. The experimental results show that variations in the microstructural morphology and residual porosity play an important role in affecting the mechanical properties of this alloy. The lamellar microstructure with a higher density, obtained by HP-ing above the beta-transition temperature (T-beta), was found to exibit a higher tensile strenght and toughness than the globular microstructure produced below T-beta. Although both types of microstructure show a mixed fracture, the ductile mode was more pronounced in the case of the fully lamellar microstructure. By controlling the HP-ing pressure and duration time, the globular microstructure, with lower porosity, improved tensile strength and ductility in combination with a better resistance to crack initation and propagation, can be obtained.",
journal = "Journal of the Serbian Chemical Society",
title = "The influence of microstructural characteristics on the mechanical properties of Ti6Al4V alloy produced by the powder metallurgy technique",
volume = "71",
number = "8-9",
pages = "985-992",
doi = "10.2298/JSC0609985B"
}

Božić, D., Cvijović, I., Vilotijević, M. N.,& Jovanović, M. T.. (2006). The influence of microstructural characteristics on the mechanical properties of Ti6Al4V alloy produced by the powder metallurgy technique. in Journal of the Serbian Chemical Society, 71(8-9), 985-992.
https://doi.org/10.2298/JSC0609985B

Božić D, Cvijović I, Vilotijević MN, Jovanović MT. The influence of microstructural characteristics on the mechanical properties of Ti6Al4V alloy produced by the powder metallurgy technique. in Journal of the Serbian Chemical Society. 2006;71(8-9):985-992.
doi:10.2298/JSC0609985B .

Božić, Dušan, Cvijović, Ivana, Vilotijević, Miroljub N., Jovanović, Milan T., "The influence of microstructural characteristics on the mechanical properties of Ti6Al4V alloy produced by the powder metallurgy technique" in Journal of the Serbian Chemical Society, 71, no. 8-9 (2006):985-992,
https://doi.org/10.2298/JSC0609985B . .

TY  - JOUR
AU  - Cvijović, Ivana
AU  - Jovanović, Milan T.
AU  - Vasiljević-Radović, Dana
AU  - Peruško, Davor
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3115
AB  - The effect of an 80Ni-20Cr (at.%) metallic coating on the cyclic oxidation behaviour of a Ti3Al-based alloy with the composition Ti-25Al-11Nb (at.%) was investigated in this study. Cyclic oxidation tests were carried out in air at 600 degrees C and 900 degrees C for 120 h. For one cycle test, the specimens were held for 24 h at test temperature and then furnace-cooled to room temperature. The oxidation rate was determined by plotting the mass gain per unit surface area of the specimen vs. exposure time. The morphology and composition of the oxidation products were characterized on the cross-section of the specimens by scanning electron microscopy, energy-dispersive X-ray spectroscopy and atomic force microscopy. The oxidation scale forms during exposure at both 600 degrees C and 900 degrees C. TiO2 is the main oxide component, whereas the Al2O3 layer appears only discontinuously. The remarkable improvement in oxidation resistance at 900 degrees C was attributed to the chemical composition and structure of the scale formed on the 80Ni-20Cr coating.
T2  - Journal of Microscopy, Oxford
T1  - The effect of an Ni-Cr protective layer on cyclic oxidation of Ti3Al
VL  - 224
SP  - 68
EP  - 71
DO  - 10.1111/j.1365-2818.2006.01667.x
ER  - 

@article{
author = "Cvijović, Ivana and Jovanović, Milan T. and Vasiljević-Radović, Dana and Peruško, Davor",
year = "2006",
abstract = "The effect of an 80Ni-20Cr (at.%) metallic coating on the cyclic oxidation behaviour of a Ti3Al-based alloy with the composition Ti-25Al-11Nb (at.%) was investigated in this study. Cyclic oxidation tests were carried out in air at 600 degrees C and 900 degrees C for 120 h. For one cycle test, the specimens were held for 24 h at test temperature and then furnace-cooled to room temperature. The oxidation rate was determined by plotting the mass gain per unit surface area of the specimen vs. exposure time. The morphology and composition of the oxidation products were characterized on the cross-section of the specimens by scanning electron microscopy, energy-dispersive X-ray spectroscopy and atomic force microscopy. The oxidation scale forms during exposure at both 600 degrees C and 900 degrees C. TiO2 is the main oxide component, whereas the Al2O3 layer appears only discontinuously. The remarkable improvement in oxidation resistance at 900 degrees C was attributed to the chemical composition and structure of the scale formed on the 80Ni-20Cr coating.",
journal = "Journal of Microscopy, Oxford",
title = "The effect of an Ni-Cr protective layer on cyclic oxidation of Ti3Al",
volume = "224",
pages = "68-71",
doi = "10.1111/j.1365-2818.2006.01667.x"
}

Cvijović, I., Jovanović, M. T., Vasiljević-Radović, D.,& Peruško, D.. (2006). The effect of an Ni-Cr protective layer on cyclic oxidation of Ti3Al. in Journal of Microscopy, Oxford, 224, 68-71.
https://doi.org/10.1111/j.1365-2818.2006.01667.x

Cvijović I, Jovanović MT, Vasiljević-Radović D, Peruško D. The effect of an Ni-Cr protective layer on cyclic oxidation of Ti3Al. in Journal of Microscopy, Oxford. 2006;224:68-71.
doi:10.1111/j.1365-2818.2006.01667.x .

Cvijović, Ivana, Jovanović, Milan T., Vasiljević-Radović, Dana, Peruško, Davor, "The effect of an Ni-Cr protective layer on cyclic oxidation of Ti3Al" in Journal of Microscopy, Oxford, 224 (2006):68-71,
https://doi.org/10.1111/j.1365-2818.2006.01667.x . .