TY  - JOUR
AU  - Matović, Branko
AU  - Tatarko, Peter
AU  - Maksimović, Vesna
AU  - Maletaškić, Jelena
AU  - Stoiljković, Milovan
AU  - Hanzel, Ondrej
AU  - Cvijović-Alagić, Ivana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12284
AB  - The B4C-SiC composites were obtained through densification of B4C and β-SiC powders with different ratios using Spark Plasma Sintering (SPS). Thermal treatment was conducted in the 1850–2000 °C temperature range under pressure of 70 MPa. Starting powder ratio effect on sintering behavior, relative density, microstructural development, and mechanical properties of obtained composites was investigated. Results showed that only starting compounds were observed in sintered ceramics with uniformly distributed and densely compacted B4C and SiC grains. Maximal relative density (100 %) was achieved for 25 % B4C-75 % SiC sample densified at 2000 °C. Obtained composites' microhardness ranged from 33 to 43 GPa, depending on constituents' content and densification temperature. Maximal microhardness was achieved for composite with the maximal amount (75 %) of B4C densified at 2000 °C. Composites' behavior in extreme conditions was evaluated through their interactions with laser beam and obtained results showed that SPS is effective densification method for obtainment of additive-free B4C-SiC composites applicable in extreme radiation environments.
T2  - Journal of the European Ceramic Society
T1  - Densification of additive-free B4C-SiC composites by spark plasma sintering
IS  - InPress
DO  - 10.1016/j.jeurceramsoc.2023.12.024
ER  - 

@article{
author = "Matović, Branko and Tatarko, Peter and Maksimović, Vesna and Maletaškić, Jelena and Stoiljković, Milovan and Hanzel, Ondrej and Cvijović-Alagić, Ivana",
year = "2023",
abstract = "The B4C-SiC composites were obtained through densification of B4C and β-SiC powders with different ratios using Spark Plasma Sintering (SPS). Thermal treatment was conducted in the 1850–2000 °C temperature range under pressure of 70 MPa. Starting powder ratio effect on sintering behavior, relative density, microstructural development, and mechanical properties of obtained composites was investigated. Results showed that only starting compounds were observed in sintered ceramics with uniformly distributed and densely compacted B4C and SiC grains. Maximal relative density (100 %) was achieved for 25 % B4C-75 % SiC sample densified at 2000 °C. Obtained composites' microhardness ranged from 33 to 43 GPa, depending on constituents' content and densification temperature. Maximal microhardness was achieved for composite with the maximal amount (75 %) of B4C densified at 2000 °C. Composites' behavior in extreme conditions was evaluated through their interactions with laser beam and obtained results showed that SPS is effective densification method for obtainment of additive-free B4C-SiC composites applicable in extreme radiation environments.",
journal = "Journal of the European Ceramic Society",
title = "Densification of additive-free B4C-SiC composites by spark plasma sintering",
number = "InPress",
doi = "10.1016/j.jeurceramsoc.2023.12.024"
}

Matović, B., Tatarko, P., Maksimović, V., Maletaškić, J., Stoiljković, M., Hanzel, O.,& Cvijović-Alagić, I.. (2023). Densification of additive-free B4C-SiC composites by spark plasma sintering. in Journal of the European Ceramic Society(InPress).
https://doi.org/10.1016/j.jeurceramsoc.2023.12.024

Matović B, Tatarko P, Maksimović V, Maletaškić J, Stoiljković M, Hanzel O, Cvijović-Alagić I. Densification of additive-free B4C-SiC composites by spark plasma sintering. in Journal of the European Ceramic Society. 2023;(InPress).
doi:10.1016/j.jeurceramsoc.2023.12.024 .

Matović, Branko, Tatarko, Peter, Maksimović, Vesna, Maletaškić, Jelena, Stoiljković, Milovan, Hanzel, Ondrej, Cvijović-Alagić, Ivana, "Densification of additive-free B4C-SiC composites by spark plasma sintering" in Journal of the European Ceramic Society, no. InPress (2023),
https://doi.org/10.1016/j.jeurceramsoc.2023.12.024 . .

TY  - JOUR
AU  - Matović, Branko
AU  - Zagorac, Dejan
AU  - Cvijović-Alagić, Ivana
AU  - Zagorac, Jelena B.
AU  - Butulija, Svetlana
AU  - Erčić, Jelena
AU  - Hanzel, Ondrej
AU  - Sedlák, Richard
AU  - Lisnichuk, Maksym
AU  - Tatarko, Peter
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10083
AB  - High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450°C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as field assisted sintering technique (FAST) at 1450°C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2)Å and 10.5999(2)Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ∼0.7mm2/s for both sintering methods.ResumenSe fabricaron con éxito, mediante sinterización por plasma sin presión y por chispa, los circonatos de tierras raras (RE) de alta entropía con estructura de pirocloro. El compuesto RE2Zr2O7 con composición nominal (La0,2Y0,2Gd0,2Nd0,2Sm0,2)Zr2O7 se preparó mediante un procedimiento simple de nitrato de glicina (GNP). El proceso GNP produjo polvos con baja cristalinidad y después de la posterior calcinación, se formaron cerámicas bien cristalinas. Durante la calcinación coexisten estructuras defectuosas de fluorita (F-RE2Zr2O7) y pirocloro cristalino (Py-RE2Zr2O7). La formación de pirocloro cristalino puro se produce después de la sinterización a 1.450°C. Después de la compactación de polvos y sin presión (PS), así como por la técnica de sinterización asistida en campo (FAST) a 1.450 oC, se obtuvieron cerámicas de alta densidad, libres de aditivos. Se realizaron investigaciones teóricas de los sistemas de pirocloro RE2Zr2O7 de alta entropía. El parámetro de celda unitaria del Py-RE2Zr2O7 obtenido es 105.892(2) Å y 105.999(2) Å para la sinterización PS y FAST, respectivamente, lo que está de acuerdo con los resultados de los cálculos de la teoría funcional de la densidad (DFT). La difusividad térmica de las muestras sinterizadas a temperatura ambiente fue de ∼ 0,7 mm2/s para ambos métodos de sinterización.
T2  - Boletín de la Sociedad Española de Cerámica y Vidrio
T1  - Fabrication and characterization of high entropy pyrochlore ceramics
T1  - Fabricación y caracterización de cerámicas de pirocloro de alta entropía
VL  - 62
IS  - 1
SP  - 66
EP  - 76
DO  - 10.1016/j.bsecv.2021.11.002
ER  - 

@article{
author = "Matović, Branko and Zagorac, Dejan and Cvijović-Alagić, Ivana and Zagorac, Jelena B. and Butulija, Svetlana and Erčić, Jelena and Hanzel, Ondrej and Sedlák, Richard and Lisnichuk, Maksym and Tatarko, Peter",
year = "2023",
abstract = "High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450°C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as field assisted sintering technique (FAST) at 1450°C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2)Å and 10.5999(2)Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ∼0.7mm2/s for both sintering methods.ResumenSe fabricaron con éxito, mediante sinterización por plasma sin presión y por chispa, los circonatos de tierras raras (RE) de alta entropía con estructura de pirocloro. El compuesto RE2Zr2O7 con composición nominal (La0,2Y0,2Gd0,2Nd0,2Sm0,2)Zr2O7 se preparó mediante un procedimiento simple de nitrato de glicina (GNP). El proceso GNP produjo polvos con baja cristalinidad y después de la posterior calcinación, se formaron cerámicas bien cristalinas. Durante la calcinación coexisten estructuras defectuosas de fluorita (F-RE2Zr2O7) y pirocloro cristalino (Py-RE2Zr2O7). La formación de pirocloro cristalino puro se produce después de la sinterización a 1.450°C. Después de la compactación de polvos y sin presión (PS), así como por la técnica de sinterización asistida en campo (FAST) a 1.450 oC, se obtuvieron cerámicas de alta densidad, libres de aditivos. Se realizaron investigaciones teóricas de los sistemas de pirocloro RE2Zr2O7 de alta entropía. El parámetro de celda unitaria del Py-RE2Zr2O7 obtenido es 105.892(2) Å y 105.999(2) Å para la sinterización PS y FAST, respectivamente, lo que está de acuerdo con los resultados de los cálculos de la teoría funcional de la densidad (DFT). La difusividad térmica de las muestras sinterizadas a temperatura ambiente fue de ∼ 0,7 mm2/s para ambos métodos de sinterización.",
journal = "Boletín de la Sociedad Española de Cerámica y Vidrio",
title = "Fabrication and characterization of high entropy pyrochlore ceramics, Fabricación y caracterización de cerámicas de pirocloro de alta entropía",
volume = "62",
number = "1",
pages = "66-76",
doi = "10.1016/j.bsecv.2021.11.002"
}

Matović, B., Zagorac, D., Cvijović-Alagić, I., Zagorac, J. B., Butulija, S., Erčić, J., Hanzel, O., Sedlák, R., Lisnichuk, M.,& Tatarko, P.. (2023). Fabrication and characterization of high entropy pyrochlore ceramics. in Boletín de la Sociedad Española de Cerámica y Vidrio, 62(1), 66-76.
https://doi.org/10.1016/j.bsecv.2021.11.002

Matović B, Zagorac D, Cvijović-Alagić I, Zagorac JB, Butulija S, Erčić J, Hanzel O, Sedlák R, Lisnichuk M, Tatarko P. Fabrication and characterization of high entropy pyrochlore ceramics. in Boletín de la Sociedad Española de Cerámica y Vidrio. 2023;62(1):66-76.
doi:10.1016/j.bsecv.2021.11.002 .

Matović, Branko, Zagorac, Dejan, Cvijović-Alagić, Ivana, Zagorac, Jelena B., Butulija, Svetlana, Erčić, Jelena, Hanzel, Ondrej, Sedlák, Richard, Lisnichuk, Maksym, Tatarko, Peter, "Fabrication and characterization of high entropy pyrochlore ceramics" in Boletín de la Sociedad Española de Cerámica y Vidrio, 62, no. 1 (2023):66-76,
https://doi.org/10.1016/j.bsecv.2021.11.002 . .

TY  - JOUR
AU  - Unsal, Hakan
AU  - Furdosova, Zuzana
AU  - Chlup, Zdenek
AU  - Tatarkova, Monika
AU  - Kovalčikova, Alexandra
AU  - Hičak, Michal
AU  - Hosseini, Naser
AU  - Zhukova, Inga
AU  - Dlouhy, Ivo
AU  - Šajgalik, Pavol
AU  - Tatarko, Peter
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11731
AB  - The effect of different content (2, 5, and 10 wt.%) of two different types of rare earth (RE) oxides (Eu2O3 and Lu2O3) on the sintering, microstructure, room temperature mechanical properties, and ablation resistance of ZrB2-25vol.% SiC ceramics were investigated. The materials were prepared using non-reactive Field Assisted Sintering Technology (FAST) in the temperature range of 1950°C – 2050°C, with a pressure of 70 MPa and a dwell of 7 min. No significant effect of the addition of 2 and 5 wt.% RE2O3 on the microstructure and the room temperature mechanical properties (hardness, indentation fracture toughness, and flexural strength) were observed. On the other hand, the coarser microstructures led to the deterioration of flexural strength and the hardness of the composites sintered with 10 wt.% RE2O3. The ablation resistance of the materials (tested up to ~ 2670°C) gradually increased with the increasing amount of RE oxides. The material with 10 wt.% Lu2O3 showed the best ablation resistance among all of the investigated compositions, with more than two times a lower ablation rate than that of the reference ZrB2-25vol.%SiC.
T2  - Journal of Innovative Materials in Extreme Conditions
T1  - ZrB2-SiC Composites with Rare-Earth Oxide Additives
VL  - 4
IS  - 1
SP  - 22
EP  - 29
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11731
ER  - 

@article{
author = "Unsal, Hakan and Furdosova, Zuzana and Chlup, Zdenek and Tatarkova, Monika and Kovalčikova, Alexandra and Hičak, Michal and Hosseini, Naser and Zhukova, Inga and Dlouhy, Ivo and Šajgalik, Pavol and Tatarko, Peter",
year = "2023",
abstract = "The effect of different content (2, 5, and 10 wt.%) of two different types of rare earth (RE) oxides (Eu2O3 and Lu2O3) on the sintering, microstructure, room temperature mechanical properties, and ablation resistance of ZrB2-25vol.% SiC ceramics were investigated. The materials were prepared using non-reactive Field Assisted Sintering Technology (FAST) in the temperature range of 1950°C – 2050°C, with a pressure of 70 MPa and a dwell of 7 min. No significant effect of the addition of 2 and 5 wt.% RE2O3 on the microstructure and the room temperature mechanical properties (hardness, indentation fracture toughness, and flexural strength) were observed. On the other hand, the coarser microstructures led to the deterioration of flexural strength and the hardness of the composites sintered with 10 wt.% RE2O3. The ablation resistance of the materials (tested up to ~ 2670°C) gradually increased with the increasing amount of RE oxides. The material with 10 wt.% Lu2O3 showed the best ablation resistance among all of the investigated compositions, with more than two times a lower ablation rate than that of the reference ZrB2-25vol.%SiC.",
journal = "Journal of Innovative Materials in Extreme Conditions",
title = "ZrB2-SiC Composites with Rare-Earth Oxide Additives",
volume = "4",
number = "1",
pages = "22-29",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11731"
}

Unsal, H., Furdosova, Z., Chlup, Z., Tatarkova, M., Kovalčikova, A., Hičak, M., Hosseini, N., Zhukova, I., Dlouhy, I., Šajgalik, P.,& Tatarko, P.. (2023). ZrB2-SiC Composites with Rare-Earth Oxide Additives. in Journal of Innovative Materials in Extreme Conditions, 4(1), 22-29.
https://hdl.handle.net/21.15107/rcub_vinar_11731

Unsal H, Furdosova Z, Chlup Z, Tatarkova M, Kovalčikova A, Hičak M, Hosseini N, Zhukova I, Dlouhy I, Šajgalik P, Tatarko P. ZrB2-SiC Composites with Rare-Earth Oxide Additives. in Journal of Innovative Materials in Extreme Conditions. 2023;4(1):22-29.
https://hdl.handle.net/21.15107/rcub_vinar_11731 .

Unsal, Hakan, Furdosova, Zuzana, Chlup, Zdenek, Tatarkova, Monika, Kovalčikova, Alexandra, Hičak, Michal, Hosseini, Naser, Zhukova, Inga, Dlouhy, Ivo, Šajgalik, Pavol, Tatarko, Peter, "ZrB2-SiC Composites with Rare-Earth Oxide Additives" in Journal of Innovative Materials in Extreme Conditions, 4, no. 1 (2023):22-29,
https://hdl.handle.net/21.15107/rcub_vinar_11731 .

TY  - CONF
AU  - Zagorac, Dejan
AU  - Cvijović-Alagić, Ivana
AU  - Zagorac, Jelena
AU  - Butulija, Svetlana
AU  - Erčić, Jelena
AU  - Hanzel, Ondrej
AU  - Sedlak, Richard
AU  - Lisnichuk, Maksym
AU  - Škundrić, Tamara
AU  - Pejić, Milan
AU  - Jovanović, Dušica
AU  - Tatarko, Peter
AU  - Matović, Branko
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11329
AB  - High-Entropy Alloys (HEAs) have attracted considerable interest due to the combination of useful properties and enhanced applications, and a few HEAs have already been shown to possess exceptional properties under extreme conditions (e.g. Ultra-High Temperature Ceramic (UHTC)). However, predicting the formation, structures, and stability of HEAs is one of the major goals of recent studies, which is expected to bring discovery of new systems with enhanced properties of the material, with special attention on high temperature and mechanical load. Here, we show an example of high-entropy rare-earth (RE) zirconates with a pyrochlore structure that was examined theoretically and experimentally observed. Theoretical methods were applied to investigate the variable composition of the ordered and disordered pyrochlore structures using quantum mechanics, group action theory, PCAE, and supercell methods. The investigated RE2Zr2O7 compound was successfully fabricated by pressureless and spark plasma sintering. with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7, prepared by simple glycine nitrate procedure (GNP) and characterized using various experimental methods (XRD, SEM, TEM, Raman, etc.). [1] Pyrochlore structures were generated using the Primitive Cell Approach for Atom Exchange (PCAE) method [2] or the supercell approach using the Crystal17 program package [3], and investigation of disordered systems and solid solutions was conducted using the group action theory [4]. Structural optimization on the ab initio level was performed using the Crystal17 code, based on a Linear Combination of Atomic Orbitals (LCAO). Density functional theory (DFT) calculations were utilized in the present study, using the local density approximation (LDA) with Perdew–Zunger (PZ) correlation functional.
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
T1  - DFT study of structural stability and mechanical properties: High-Entropy Alloys (HEAs) - Ultra-High Temperature Ceramics (UHTC)
SP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11329
ER  - 

@conference{
author = "Zagorac, Dejan and Cvijović-Alagić, Ivana and Zagorac, Jelena and Butulija, Svetlana and Erčić, Jelena and Hanzel, Ondrej and Sedlak, Richard and Lisnichuk, Maksym and Škundrić, Tamara and Pejić, Milan and Jovanović, Dušica and Tatarko, Peter and Matović, Branko",
year = "2022",
abstract = "High-Entropy Alloys (HEAs) have attracted considerable interest due to the combination of useful properties and enhanced applications, and a few HEAs have already been shown to possess exceptional properties under extreme conditions (e.g. Ultra-High Temperature Ceramic (UHTC)). However, predicting the formation, structures, and stability of HEAs is one of the major goals of recent studies, which is expected to bring discovery of new systems with enhanced properties of the material, with special attention on high temperature and mechanical load. Here, we show an example of high-entropy rare-earth (RE) zirconates with a pyrochlore structure that was examined theoretically and experimentally observed. Theoretical methods were applied to investigate the variable composition of the ordered and disordered pyrochlore structures using quantum mechanics, group action theory, PCAE, and supercell methods. The investigated RE2Zr2O7 compound was successfully fabricated by pressureless and spark plasma sintering. with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7, prepared by simple glycine nitrate procedure (GNP) and characterized using various experimental methods (XRD, SEM, TEM, Raman, etc.). [1] Pyrochlore structures were generated using the Primitive Cell Approach for Atom Exchange (PCAE) method [2] or the supercell approach using the Crystal17 program package [3], and investigation of disordered systems and solid solutions was conducted using the group action theory [4]. Structural optimization on the ab initio level was performed using the Crystal17 code, based on a Linear Combination of Atomic Orbitals (LCAO). Density functional theory (DFT) calculations were utilized in the present study, using the local density approximation (LDA) with Perdew–Zunger (PZ) correlation functional.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts",
title = "DFT study of structural stability and mechanical properties: High-Entropy Alloys (HEAs) - Ultra-High Temperature Ceramics (UHTC)",
pages = "43",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11329"
}

Zagorac, D., Cvijović-Alagić, I., Zagorac, J., Butulija, S., Erčić, J., Hanzel, O., Sedlak, R., Lisnichuk, M., Škundrić, T., Pejić, M., Jovanović, D., Tatarko, P.,& Matović, B.. (2022). DFT study of structural stability and mechanical properties: High-Entropy Alloys (HEAs) - Ultra-High Temperature Ceramics (UHTC). in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 43.
https://hdl.handle.net/21.15107/rcub_vinar_11329

Zagorac D, Cvijović-Alagić I, Zagorac J, Butulija S, Erčić J, Hanzel O, Sedlak R, Lisnichuk M, Škundrić T, Pejić M, Jovanović D, Tatarko P, Matović B. DFT study of structural stability and mechanical properties: High-Entropy Alloys (HEAs) - Ultra-High Temperature Ceramics (UHTC). in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts. 2022;:43.
https://hdl.handle.net/21.15107/rcub_vinar_11329 .

Zagorac, Dejan, Cvijović-Alagić, Ivana, Zagorac, Jelena, Butulija, Svetlana, Erčić, Jelena, Hanzel, Ondrej, Sedlak, Richard, Lisnichuk, Maksym, Škundrić, Tamara, Pejić, Milan, Jovanović, Dušica, Tatarko, Peter, Matović, Branko, "DFT study of structural stability and mechanical properties: High-Entropy Alloys (HEAs) - Ultra-High Temperature Ceramics (UHTC)" in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts (2022):43,
https://hdl.handle.net/21.15107/rcub_vinar_11329 .

TY  - CONF
AU  - Cvijović-Alagić, Ivana
AU  - Zagorac, Dejan
AU  - Zagorac, Jelena
AU  - Butulija, Svetlana
AU  - Erčić, Jelena
AU  - Hanzel, Ondrej
AU  - Sedlak, Richard
AU  - Lisnichuk, Maksym
AU  - Škundrić, Tamara
AU  - Pejić, Milan
AU  - Jovanović, Dušica
AU  - Tatarko, Peter
AU  - Matović, Branko
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11331
PB  - Belgrade : Institute for Multidisciplinary Research, University of Belgrade
C3  - Advanced Ceramics and Application : 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Structural and mechanical properties of highentropy alloys (HEAS) - ultra-high temperature ceramics (UHTC) on DFT level
SP  - 80
EP  - 81
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11331
ER  - 

@conference{
author = "Cvijović-Alagić, Ivana and Zagorac, Dejan and Zagorac, Jelena and Butulija, Svetlana and Erčić, Jelena and Hanzel, Ondrej and Sedlak, Richard and Lisnichuk, Maksym and Škundrić, Tamara and Pejić, Milan and Jovanović, Dušica and Tatarko, Peter and Matović, Branko",
year = "2022",
publisher = "Belgrade : Institute for Multidisciplinary Research, University of Belgrade",
journal = "Advanced Ceramics and Application : 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Structural and mechanical properties of highentropy alloys (HEAS) - ultra-high temperature ceramics (UHTC) on DFT level",
pages = "80-81",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11331"
}

Cvijović-Alagić, I., Zagorac, D., Zagorac, J., Butulija, S., Erčić, J., Hanzel, O., Sedlak, R., Lisnichuk, M., Škundrić, T., Pejić, M., Jovanović, D., Tatarko, P.,& Matović, B.. (2022). Structural and mechanical properties of highentropy alloys (HEAS) - ultra-high temperature ceramics (UHTC) on DFT level. in Advanced Ceramics and Application : 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research, University of Belgrade., 80-81.
https://hdl.handle.net/21.15107/rcub_vinar_11331

Cvijović-Alagić I, Zagorac D, Zagorac J, Butulija S, Erčić J, Hanzel O, Sedlak R, Lisnichuk M, Škundrić T, Pejić M, Jovanović D, Tatarko P, Matović B. Structural and mechanical properties of highentropy alloys (HEAS) - ultra-high temperature ceramics (UHTC) on DFT level. in Advanced Ceramics and Application : 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:80-81.
https://hdl.handle.net/21.15107/rcub_vinar_11331 .

Cvijović-Alagić, Ivana, Zagorac, Dejan, Zagorac, Jelena, Butulija, Svetlana, Erčić, Jelena, Hanzel, Ondrej, Sedlak, Richard, Lisnichuk, Maksym, Škundrić, Tamara, Pejić, Milan, Jovanović, Dušica, Tatarko, Peter, Matović, Branko, "Structural and mechanical properties of highentropy alloys (HEAS) - ultra-high temperature ceramics (UHTC) on DFT level" in Advanced Ceramics and Application : 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):80-81,
https://hdl.handle.net/21.15107/rcub_vinar_11331 .

TY  - CONF
AU  - Matović, Branko
AU  - Zagorac, Dejan
AU  - Cvijović-Alagić, Ivana
AU  - Zagorac, Jelena
AU  - Butulija, Svetlana
AU  - Erčić, Jelena
AU  - Hanzel, Ondrej
AU  - Sedlak, Richard
AU  - Lisnichuk, Maksym
AU  - Tatarko, Peter
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11332
AB  - High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450 C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as Field Assisted Sintering Technique (FAST) at 1450 C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2) Å and 10.5999(2) Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ~0.7 mm2 /s for both sintering methods.
PB  - Belgrade : Materials Research Society of Serbia – MRS-Serbia
C3  - 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts
T1  - Fabrication and characterization of high entropy pyrochlore ceramics
VL  - XLV
SP  - 115
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11332
ER  - 

@conference{
author = "Matović, Branko and Zagorac, Dejan and Cvijović-Alagić, Ivana and Zagorac, Jelena and Butulija, Svetlana and Erčić, Jelena and Hanzel, Ondrej and Sedlak, Richard and Lisnichuk, Maksym and Tatarko, Peter",
year = "2022",
abstract = "High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450 C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as Field Assisted Sintering Technique (FAST) at 1450 C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2) Å and 10.5999(2) Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ~0.7 mm2 /s for both sintering methods.",
publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia",
journal = "23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts",
title = "Fabrication and characterization of high entropy pyrochlore ceramics",
volume = "XLV",
pages = "115",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11332"
}

Matović, B., Zagorac, D., Cvijović-Alagić, I., Zagorac, J., Butulija, S., Erčić, J., Hanzel, O., Sedlak, R., Lisnichuk, M.,& Tatarko, P.. (2022). Fabrication and characterization of high entropy pyrochlore ceramics. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts
Belgrade : Materials Research Society of Serbia – MRS-Serbia., XLV, 115.
https://hdl.handle.net/21.15107/rcub_vinar_11332

Matović B, Zagorac D, Cvijović-Alagić I, Zagorac J, Butulija S, Erčić J, Hanzel O, Sedlak R, Lisnichuk M, Tatarko P. Fabrication and characterization of high entropy pyrochlore ceramics. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts. 2022;XLV:115.
https://hdl.handle.net/21.15107/rcub_vinar_11332 .

Matović, Branko, Zagorac, Dejan, Cvijović-Alagić, Ivana, Zagorac, Jelena, Butulija, Svetlana, Erčić, Jelena, Hanzel, Ondrej, Sedlak, Richard, Lisnichuk, Maksym, Tatarko, Peter, "Fabrication and characterization of high entropy pyrochlore ceramics" in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts, XLV (2022):115,
https://hdl.handle.net/21.15107/rcub_vinar_11332 .

TY  - JOUR
AU  - Škundrić, Tamara
AU  - Matović, Branko
AU  - Zarubica, Aleksandra R.
AU  - Zagorac, Jelena B.
AU  - Tatarko, Peter
AU  - Zagorac, Dejan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10101
AB  - Silicon borides represent very appealing industrial materials for research owing to their remarkable features, and, together with other boride and carbide-based materials, have very wide applications. Various Si–B phases have been investigated in the past, however a limited number of studies have been done on the pristine SiB6 compound. Structure prediction using a data mining ab initio approach has been performed in pure silicon hexaboride. Several novel structures, for which there are no previous experimental or theoretical data, have been discovered. Each of the structure candidates were locally optimized on the DFT level, employing the LDA-PZ and the GGA-PBE functional. Mechanical and elastic properties for each of the predicted and experimentally observed modifications have been investigated in great detail. In particular, the ductility/brittleness relationship, the character of the bonding, Young’s modulus E, bulk modulus B, and shear modulus K, including anisotropy, have been calculated and analyzed.
T2  - Materials
T1  - Structure Prediction and Mechanical Properties of Silicon Hexaboride on Ab Initio Level
VL  - 14
IS  - 24
SP  - 7887
DO  - 10.3390/ma14247887
ER  - 

@article{
author = "Škundrić, Tamara and Matović, Branko and Zarubica, Aleksandra R. and Zagorac, Jelena B. and Tatarko, Peter and Zagorac, Dejan",
year = "2021",
abstract = "Silicon borides represent very appealing industrial materials for research owing to their remarkable features, and, together with other boride and carbide-based materials, have very wide applications. Various Si–B phases have been investigated in the past, however a limited number of studies have been done on the pristine SiB6 compound. Structure prediction using a data mining ab initio approach has been performed in pure silicon hexaboride. Several novel structures, for which there are no previous experimental or theoretical data, have been discovered. Each of the structure candidates were locally optimized on the DFT level, employing the LDA-PZ and the GGA-PBE functional. Mechanical and elastic properties for each of the predicted and experimentally observed modifications have been investigated in great detail. In particular, the ductility/brittleness relationship, the character of the bonding, Young’s modulus E, bulk modulus B, and shear modulus K, including anisotropy, have been calculated and analyzed.",
journal = "Materials",
title = "Structure Prediction and Mechanical Properties of Silicon Hexaboride on Ab Initio Level",
volume = "14",
number = "24",
pages = "7887",
doi = "10.3390/ma14247887"
}

Škundrić, T., Matović, B., Zarubica, A. R., Zagorac, J. B., Tatarko, P.,& Zagorac, D.. (2021). Structure Prediction and Mechanical Properties of Silicon Hexaboride on Ab Initio Level. in Materials, 14(24), 7887.
https://doi.org/10.3390/ma14247887

Škundrić T, Matović B, Zarubica AR, Zagorac JB, Tatarko P, Zagorac D. Structure Prediction and Mechanical Properties of Silicon Hexaboride on Ab Initio Level. in Materials. 2021;14(24):7887.
doi:10.3390/ma14247887 .

Škundrić, Tamara, Matović, Branko, Zarubica, Aleksandra R., Zagorac, Jelena B., Tatarko, Peter, Zagorac, Dejan, "Structure Prediction and Mechanical Properties of Silicon Hexaboride on Ab Initio Level" in Materials, 14, no. 24 (2021):7887,
https://doi.org/10.3390/ma14247887 . .