TY  - JOUR
AU  - Matović, Branko
AU  - Živić, Fatima
AU  - Mitrovic, Slobodan
AU  - Pršić, Dragan H.
AU  - Maksimović, Vesna
AU  - Volkov-Husović, Tatjana
AU  - Kumar, Ravi
AU  - Daneu, Nina
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/864
AB  - Cubic SiC nano-powder particles were synthesized by a sal-gel process with an average grains size of 9.5 nm which were subsequently densified by using a high-pressure anvil-type with hollows apparatus at a pressure of 4 GPa in order to obtain nanostructured bulk ceramic compacts. The density obtained was GT 98% at a sintering temperature of 1500 degrees C with a holding time of only 60s. The calculation of the average crystallite size (D) was performed on the basis of the full width at half maximum intensity (FWHM) of the XRD peaks. Williamson-Hall plots were used to separate the effect of the size and strain in the nanostructured SiC compacts. Sintered nanostructured SiC ceramic exhibits hardness and elastic modulus of 32-420 GPa respectively. Wear properties were investigated and the average value of dynamic friction coefficient obtained was 0.16. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Materials Letters
T1  - Ultra-high pressure densification and properties of nanostructured SiC
VL  - 164
SP  - 68
EP  - 71
DO  - 10.1016/j.matlet.2015.09.043
ER  - 

@article{
author = "Matović, Branko and Živić, Fatima and Mitrovic, Slobodan and Pršić, Dragan H. and Maksimović, Vesna and Volkov-Husović, Tatjana and Kumar, Ravi and Daneu, Nina",
year = "2016",
abstract = "Cubic SiC nano-powder particles were synthesized by a sal-gel process with an average grains size of 9.5 nm which were subsequently densified by using a high-pressure anvil-type with hollows apparatus at a pressure of 4 GPa in order to obtain nanostructured bulk ceramic compacts. The density obtained was GT 98% at a sintering temperature of 1500 degrees C with a holding time of only 60s. The calculation of the average crystallite size (D) was performed on the basis of the full width at half maximum intensity (FWHM) of the XRD peaks. Williamson-Hall plots were used to separate the effect of the size and strain in the nanostructured SiC compacts. Sintered nanostructured SiC ceramic exhibits hardness and elastic modulus of 32-420 GPa respectively. Wear properties were investigated and the average value of dynamic friction coefficient obtained was 0.16. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Ultra-high pressure densification and properties of nanostructured SiC",
volume = "164",
pages = "68-71",
doi = "10.1016/j.matlet.2015.09.043"
}

Matović, B., Živić, F., Mitrovic, S., Pršić, D. H., Maksimović, V., Volkov-Husović, T., Kumar, R.,& Daneu, N.. (2016). Ultra-high pressure densification and properties of nanostructured SiC. in Materials Letters
Elsevier., 164, 68-71.
https://doi.org/10.1016/j.matlet.2015.09.043

Matović B, Živić F, Mitrovic S, Pršić DH, Maksimović V, Volkov-Husović T, Kumar R, Daneu N. Ultra-high pressure densification and properties of nanostructured SiC. in Materials Letters. 2016;164:68-71.
doi:10.1016/j.matlet.2015.09.043 .

Matović, Branko, Živić, Fatima, Mitrovic, Slobodan, Pršić, Dragan H., Maksimović, Vesna, Volkov-Husović, Tatjana, Kumar, Ravi, Daneu, Nina, "Ultra-high pressure densification and properties of nanostructured SiC" in Materials Letters, 164 (2016):68-71,
https://doi.org/10.1016/j.matlet.2015.09.043 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Rajković, Višeslava M.
AU  - Živić, Fatima
AU  - Mitrovic, Slobodan
AU  - Cvijović-Alagić, Ivana
AU  - Jovanović, Milan T.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5566
AB  - Three copper-based alloys, i.e. two composites reinforced with Al2O3 particles and fabricated through PM route and Cu-Cr-Zr alloy processed by the vacuum melting and casting technique were the object of this investigation. Light microscope, scanning electron microscope (SEM) equipped with electron X-ray spectrometer (EDS) and transmission electron microscope (TEM) were used for microstructural characterization. The ball-on-disc nanotribometer served for wear and friction tests applying low sliding speeds (6, 8 and 10 mm/s) at constant load (1 N). The objective of the paper was to investigate the effect of different processing techniques on microstructure, thermal stability and the tribological characteristics of composites and copper ingot alloy. Nano-sized Al2O3 particles (less than 100 nm in size) are present not only in the copper matrix of Cu-2.5 wt.% Al composite, obtained by internal oxidation, but they are also formed at the grain boundaries preventing the grain growth and providing very small grain size. During the high temperature annealing (in the range 300-950 degrees C) composites behaved much better than the ingot alloy. The highest thermal stability showed Cu-2.5 wt.% Al composite. The pinning effect of nano-sized Al2O3 particles prevents the grain growth slowing down recrystallization of this composite up to 900 degrees C. Micro-sized Al2O3 particles in Cu-5 wt.% Al2O3 composite, processed by mechanical annealing, are not effective in preventing dislocation motion and the grain growth, whereas microstructure of Cu-0.4 wt.% Cr-0.08 wt.% Zr ingot alloy was completely recrystallized around 550 degrees C. Cu-2.5 wt.% Al composite showed the best wear resistance, approximately 2.5 times higher than that of Cu-5 wt.% Al2O3 composite. High hardness and nano-sized Al2O3 particles size combined with the fine-grain structure are the main parameters leading to the improved wear resistance of the Cu-2.5Al composite. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - The effect of processing techniques on microstructural and tribological properties of copper-based alloys
VL  - 280
SP  - 646
EP  - 654
DO  - 10.1016/j.apsusc.2013.05.039
ER  - 

@article{
author = "Vencl, Aleksandar and Rajković, Višeslava M. and Živić, Fatima and Mitrovic, Slobodan and Cvijović-Alagić, Ivana and Jovanović, Milan T.",
year = "2013",
abstract = "Three copper-based alloys, i.e. two composites reinforced with Al2O3 particles and fabricated through PM route and Cu-Cr-Zr alloy processed by the vacuum melting and casting technique were the object of this investigation. Light microscope, scanning electron microscope (SEM) equipped with electron X-ray spectrometer (EDS) and transmission electron microscope (TEM) were used for microstructural characterization. The ball-on-disc nanotribometer served for wear and friction tests applying low sliding speeds (6, 8 and 10 mm/s) at constant load (1 N). The objective of the paper was to investigate the effect of different processing techniques on microstructure, thermal stability and the tribological characteristics of composites and copper ingot alloy. Nano-sized Al2O3 particles (less than 100 nm in size) are present not only in the copper matrix of Cu-2.5 wt.% Al composite, obtained by internal oxidation, but they are also formed at the grain boundaries preventing the grain growth and providing very small grain size. During the high temperature annealing (in the range 300-950 degrees C) composites behaved much better than the ingot alloy. The highest thermal stability showed Cu-2.5 wt.% Al composite. The pinning effect of nano-sized Al2O3 particles prevents the grain growth slowing down recrystallization of this composite up to 900 degrees C. Micro-sized Al2O3 particles in Cu-5 wt.% Al2O3 composite, processed by mechanical annealing, are not effective in preventing dislocation motion and the grain growth, whereas microstructure of Cu-0.4 wt.% Cr-0.08 wt.% Zr ingot alloy was completely recrystallized around 550 degrees C. Cu-2.5 wt.% Al composite showed the best wear resistance, approximately 2.5 times higher than that of Cu-5 wt.% Al2O3 composite. High hardness and nano-sized Al2O3 particles size combined with the fine-grain structure are the main parameters leading to the improved wear resistance of the Cu-2.5Al composite. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "The effect of processing techniques on microstructural and tribological properties of copper-based alloys",
volume = "280",
pages = "646-654",
doi = "10.1016/j.apsusc.2013.05.039"
}

Vencl, A., Rajković, V. M., Živić, F., Mitrovic, S., Cvijović-Alagić, I.,& Jovanović, M. T.. (2013). The effect of processing techniques on microstructural and tribological properties of copper-based alloys. in Applied Surface Science, 280, 646-654.
https://doi.org/10.1016/j.apsusc.2013.05.039

Vencl A, Rajković VM, Živić F, Mitrovic S, Cvijović-Alagić I, Jovanović MT. The effect of processing techniques on microstructural and tribological properties of copper-based alloys. in Applied Surface Science. 2013;280:646-654.
doi:10.1016/j.apsusc.2013.05.039 .

Vencl, Aleksandar, Rajković, Višeslava M., Živić, Fatima, Mitrovic, Slobodan, Cvijović-Alagić, Ivana, Jovanović, Milan T., "The effect of processing techniques on microstructural and tribological properties of copper-based alloys" in Applied Surface Science, 280 (2013):646-654,
https://doi.org/10.1016/j.apsusc.2013.05.039 . .

TY  - JOUR
AU  - Babić, Miroslav
AU  - Mitrovic, Slobodan
AU  - Živić, Fatima
AU  - Bobić, Ilija
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4012
AB  - In present study, the effect of Al2O3 particle reinforcement on the sliding behavior of ZA-27 alloy composites was investigated. The composites with 3, 5, and 10 wt% of Al2O3 particles were produced by the compocasting procedure. Tribological properties of unreinforced alloy and composite were studied, using block-on-disk tribometer under unlubricated sliding conditions at different specific loads and sliding speeds. The worn surfaces of samples were examined by the scanning electron microscopy (SEM). The test results revealed that those composite specimens exhibited significantly lower wear rate than the ZA-27 matrix alloy specimens in all combinations of applied loads and sliding speeds. The difference in the wear resistance of composite with respect to the matrix alloy, increased with the increase of the applied load/sliding speed and Al2O3 particle content. The highest degree of improvement of the ZA-27 alloy tribological behavior corresponded with change of the Al2O3 particles content from 3 to 5 wt%. At low sliding speed, moderate lower wear rate of the composites over that of the matrix alloy was noticed. This has been attributed to micro cracking tendency of the composites. Significantly reduced wear rate, experienced by the composite over that of the matrix alloy at the higher sliding speeds and loads, could be explained due to enhanced compatibility of matrix alloy with dispersoid phase and greater thermal stability of the composite in view of the presence of the dispersoid. Level of wear rate of tested ZA-27/Al2O3 samples pointed to the process of mild wear, which was primarily controlled by the formation and destruction of mechanical mixed layers (MMLs).
T2  - Tribology Letters
T1  - Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition
VL  - 38
IS  - 3
SP  - 337
EP  - 346
DO  - 10.1007/s11249-010-9613-5
ER  - 

@article{
author = "Babić, Miroslav and Mitrovic, Slobodan and Živić, Fatima and Bobić, Ilija",
year = "2010",
abstract = "In present study, the effect of Al2O3 particle reinforcement on the sliding behavior of ZA-27 alloy composites was investigated. The composites with 3, 5, and 10 wt% of Al2O3 particles were produced by the compocasting procedure. Tribological properties of unreinforced alloy and composite were studied, using block-on-disk tribometer under unlubricated sliding conditions at different specific loads and sliding speeds. The worn surfaces of samples were examined by the scanning electron microscopy (SEM). The test results revealed that those composite specimens exhibited significantly lower wear rate than the ZA-27 matrix alloy specimens in all combinations of applied loads and sliding speeds. The difference in the wear resistance of composite with respect to the matrix alloy, increased with the increase of the applied load/sliding speed and Al2O3 particle content. The highest degree of improvement of the ZA-27 alloy tribological behavior corresponded with change of the Al2O3 particles content from 3 to 5 wt%. At low sliding speed, moderate lower wear rate of the composites over that of the matrix alloy was noticed. This has been attributed to micro cracking tendency of the composites. Significantly reduced wear rate, experienced by the composite over that of the matrix alloy at the higher sliding speeds and loads, could be explained due to enhanced compatibility of matrix alloy with dispersoid phase and greater thermal stability of the composite in view of the presence of the dispersoid. Level of wear rate of tested ZA-27/Al2O3 samples pointed to the process of mild wear, which was primarily controlled by the formation and destruction of mechanical mixed layers (MMLs).",
journal = "Tribology Letters",
title = "Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition",
volume = "38",
number = "3",
pages = "337-346",
doi = "10.1007/s11249-010-9613-5"
}

Babić, M., Mitrovic, S., Živić, F.,& Bobić, I.. (2010). Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition. in Tribology Letters, 38(3), 337-346.
https://doi.org/10.1007/s11249-010-9613-5

Babić M, Mitrovic S, Živić F, Bobić I. Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition. in Tribology Letters. 2010;38(3):337-346.
doi:10.1007/s11249-010-9613-5 .

Babić, Miroslav, Mitrovic, Slobodan, Živić, Fatima, Bobić, Ilija, "Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition" in Tribology Letters, 38, no. 3 (2010):337-346,
https://doi.org/10.1007/s11249-010-9613-5 . .