TY  - CONF
AU  - Rajković, Višeslava M.
AU  - Božić, Dušan
AU  - Stašić, Jelena
AU  - Jovanović, Milan T.
AU  - Wang, Huaiwen
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7033
AB  - Copper matrix was simultaneously reinforced with nano- and micro-sized Al2O3 particles via high-energy milling of the mixture of inert gas-atomized prealloyed Cu-1 wt.% Al powder and 0.6 wt.% commercial Al2O3 powder. At the maximum of microhardness (2400 MPa) the grain size reaches the smallest value as a result of the synergetic effect of nano- and micro-sized Al2O3 particles. The relatively low decrease in microhardness during HTE may be explained by grain growth which is retarded by Al2O3 nano-sized particles precipitated at the grain boundaries.
T1  - Properties of Copper-Based Composite Reinforced with Al2O3 Particles of Different Size
VL  - 875-877
SP  - 318
EP  - +
DO  - 10.4028/www.scientific.net/AMR.875-877.318
ER  - 

@conference{
author = "Rajković, Višeslava M. and Božić, Dušan and Stašić, Jelena and Jovanović, Milan T. and Wang, Huaiwen",
year = "2014",
abstract = "Copper matrix was simultaneously reinforced with nano- and micro-sized Al2O3 particles via high-energy milling of the mixture of inert gas-atomized prealloyed Cu-1 wt.% Al powder and 0.6 wt.% commercial Al2O3 powder. At the maximum of microhardness (2400 MPa) the grain size reaches the smallest value as a result of the synergetic effect of nano- and micro-sized Al2O3 particles. The relatively low decrease in microhardness during HTE may be explained by grain growth which is retarded by Al2O3 nano-sized particles precipitated at the grain boundaries.",
title = "Properties of Copper-Based Composite Reinforced with Al2O3 Particles of Different Size",
volume = "875-877",
pages = "318-+",
doi = "10.4028/www.scientific.net/AMR.875-877.318"
}

Rajković, V. M., Božić, D., Stašić, J., Jovanović, M. T.,& Wang, H.. (2014). Properties of Copper-Based Composite Reinforced with Al2O3 Particles of Different Size. , 875-877, 318-+.
https://doi.org/10.4028/www.scientific.net/AMR.875-877.318

Rajković VM, Božić D, Stašić J, Jovanović MT, Wang H. Properties of Copper-Based Composite Reinforced with Al2O3 Particles of Different Size. 2014;875-877:318-+.
doi:10.4028/www.scientific.net/AMR.875-877.318 .

Rajković, Višeslava M., Božić, Dušan, Stašić, Jelena, Jovanović, Milan T., Wang, Huaiwen, "Properties of Copper-Based Composite Reinforced with Al2O3 Particles of Different Size", 875-877 (2014):318-+,
https://doi.org/10.4028/www.scientific.net/AMR.875-877.318 . .

TY  - JOUR
AU  - Rajković, Višeslava M.
AU  - Božić, Dušan
AU  - Stašić, Jelena
AU  - Wang, Huaiwen
AU  - Jovanović, Milan T.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/176
AB  - Copper-based composites strengthened by nano- and micro-sized alumina particles were fabricated by internal oxidation and mechanical alloying followed by hot-pressing. The effect of the simultaneous presence of nano- and micro-sized alumina particles on the microstructure and properties of the copper matrix was the object of this study. The inert gas-atomised prealloyed copper powder containing 0.5 wt.% Al and the mixture of inert gas-atomized prealloyed copper powder with 0.6 wt.% micro-sized alumina powder served as starting materials. Microstructure of composites was studied by X-ray diffraction analysis, scanning (SEM) and transmission electron microscopy (TEM). Microhardness, density and electrical conductivity were also applied for determination of properties. Microstructural characterization showed that nano-sized alumina particles significantly lower the grain size and inhibit the grain growth. Considerable increase of microhardness was also detected. At the maximum values (after 10 h of milling) the microhardness of both composites, Cu-0.5 wt.% Al and hybrid Cu-0.5 wt% Al + 0.6 wt.% Al2O3, was approximately 3 times higher than microhardness of non-milled compacts processed from prealloyed copper and electrolytic copper powders. Micro-sized alumina particles play a twofold role in the strengthening of the copper matrix of the hybrid composite: together with the nano-sized particles they strengthen the matrix at shorter milling time, but with prolonged milling time the dislocation substructure formed around coarse particles serves as a trigger for the start of recrystallization processes provoking a decrease of microhardness. Both composites exhibit a much higher thermal stability at 800 degrees C than copper alloy processed by the method of vacuum melting and casting. The contribution of individual mechanisms such as the grain size, thermal expansion mismatch and Orowan hardening in strengthening of composites was evaluated and correlated with experimental-results. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Powder Technology
T1  - Processing, characterization and properties of copper-based composites strengthened by low amount of alumina particles
VL  - 268
SP  - 392
EP  - 400
DO  - 10.1016/j.powtec.2014.08.051
ER  - 

@article{
author = "Rajković, Višeslava M. and Božić, Dušan and Stašić, Jelena and Wang, Huaiwen and Jovanović, Milan T.",
year = "2014",
abstract = "Copper-based composites strengthened by nano- and micro-sized alumina particles were fabricated by internal oxidation and mechanical alloying followed by hot-pressing. The effect of the simultaneous presence of nano- and micro-sized alumina particles on the microstructure and properties of the copper matrix was the object of this study. The inert gas-atomised prealloyed copper powder containing 0.5 wt.% Al and the mixture of inert gas-atomized prealloyed copper powder with 0.6 wt.% micro-sized alumina powder served as starting materials. Microstructure of composites was studied by X-ray diffraction analysis, scanning (SEM) and transmission electron microscopy (TEM). Microhardness, density and electrical conductivity were also applied for determination of properties. Microstructural characterization showed that nano-sized alumina particles significantly lower the grain size and inhibit the grain growth. Considerable increase of microhardness was also detected. At the maximum values (after 10 h of milling) the microhardness of both composites, Cu-0.5 wt.% Al and hybrid Cu-0.5 wt% Al + 0.6 wt.% Al2O3, was approximately 3 times higher than microhardness of non-milled compacts processed from prealloyed copper and electrolytic copper powders. Micro-sized alumina particles play a twofold role in the strengthening of the copper matrix of the hybrid composite: together with the nano-sized particles they strengthen the matrix at shorter milling time, but with prolonged milling time the dislocation substructure formed around coarse particles serves as a trigger for the start of recrystallization processes provoking a decrease of microhardness. Both composites exhibit a much higher thermal stability at 800 degrees C than copper alloy processed by the method of vacuum melting and casting. The contribution of individual mechanisms such as the grain size, thermal expansion mismatch and Orowan hardening in strengthening of composites was evaluated and correlated with experimental-results. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Powder Technology",
title = "Processing, characterization and properties of copper-based composites strengthened by low amount of alumina particles",
volume = "268",
pages = "392-400",
doi = "10.1016/j.powtec.2014.08.051"
}

Rajković, V. M., Božić, D., Stašić, J., Wang, H.,& Jovanović, M. T.. (2014). Processing, characterization and properties of copper-based composites strengthened by low amount of alumina particles. in Powder Technology, 268, 392-400.
https://doi.org/10.1016/j.powtec.2014.08.051

Rajković VM, Božić D, Stašić J, Wang H, Jovanović MT. Processing, characterization and properties of copper-based composites strengthened by low amount of alumina particles. in Powder Technology. 2014;268:392-400.
doi:10.1016/j.powtec.2014.08.051 .

Rajković, Višeslava M., Božić, Dušan, Stašić, Jelena, Wang, Huaiwen, Jovanović, Milan T., "Processing, characterization and properties of copper-based composites strengthened by low amount of alumina particles" in Powder Technology, 268 (2014):392-400,
https://doi.org/10.1016/j.powtec.2014.08.051 . .