Characteristic of copper matrix simultaneously reinforced with nano- and micro-sized Al2O3 particles
Abstract
The effect of the simultaneous presence of nano- and micro-sized Al2O3 particles on the microstructure and properties of copper matrix was the object of this study. The mixture of inert gas-atomized prealloyed copper powder (with 1 wt.% Al) and 0.6 wt.% commercial Al2O3 powder (serving as micro-sized particles) was used as the starting materials. Strengthening of the copper matrix was performed by treating the powders in the air for up to 20 h in the planetary ball mill. During milling of the prealloyed powder, finely dispersed nano-sized Al2O3 particles were formed in situ by internal oxidation. The approximate size of these particles was between 30 and 60 nm. The highest values of microhardness were reached in compacts processed from 10 h-milled powders. The microhardness of compact obtained from 10 h-milled powder was 3 times higher than the microhardness of compact processed from as-received and non-milled prealloyed powder. At the maximum microhardness the grain size reaches the s...mallest value as a result of the synergetic effect of nano- and micro-sized Al2O3 particles. Recrystallization, which occurred during prolonged milling, was the main factor influencing the decrease in microhardness. The increase in electrical conductivity of compacts after 15 h of milling is the result of the decrease in microhardness and activated recrystallization processes. (C) 2012 Elsevier Inc. All rights reserved.
Keywords:
Mechanical alloying / Internal oxidation / Nano- and micro-sized Al2O3 / particles / Strengthening / Microhardness / Electrical conductivitySource:
Materials Characterization, 2012, 67, 129-137Funding / projects:
- The effect of nano- and microconstituents on the synthesis and characteristics of novel composite materials with metal matrix (RS-MESTD-Basic Research (BR or ON)-172005)
DOI: 10.1016/j.matchar.2012.02.022
ISSN: 1044-5803
WoS: 000303642600015
Scopus: 2-s2.0-84859543759
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VinčaTY - JOUR AU - Rajković, Višeslava M. AU - Božić, Dušan AU - Devečerski, Aleksandar AU - Jovanović, Milan T. PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4833 AB - The effect of the simultaneous presence of nano- and micro-sized Al2O3 particles on the microstructure and properties of copper matrix was the object of this study. The mixture of inert gas-atomized prealloyed copper powder (with 1 wt.% Al) and 0.6 wt.% commercial Al2O3 powder (serving as micro-sized particles) was used as the starting materials. Strengthening of the copper matrix was performed by treating the powders in the air for up to 20 h in the planetary ball mill. During milling of the prealloyed powder, finely dispersed nano-sized Al2O3 particles were formed in situ by internal oxidation. The approximate size of these particles was between 30 and 60 nm. The highest values of microhardness were reached in compacts processed from 10 h-milled powders. The microhardness of compact obtained from 10 h-milled powder was 3 times higher than the microhardness of compact processed from as-received and non-milled prealloyed powder. At the maximum microhardness the grain size reaches the smallest value as a result of the synergetic effect of nano- and micro-sized Al2O3 particles. Recrystallization, which occurred during prolonged milling, was the main factor influencing the decrease in microhardness. The increase in electrical conductivity of compacts after 15 h of milling is the result of the decrease in microhardness and activated recrystallization processes. (C) 2012 Elsevier Inc. All rights reserved. T2 - Materials Characterization T1 - Characteristic of copper matrix simultaneously reinforced with nano- and micro-sized Al2O3 particles VL - 67 SP - 129 EP - 137 DO - 10.1016/j.matchar.2012.02.022 ER -
@article{ author = "Rajković, Višeslava M. and Božić, Dušan and Devečerski, Aleksandar and Jovanović, Milan T.", year = "2012", abstract = "The effect of the simultaneous presence of nano- and micro-sized Al2O3 particles on the microstructure and properties of copper matrix was the object of this study. The mixture of inert gas-atomized prealloyed copper powder (with 1 wt.% Al) and 0.6 wt.% commercial Al2O3 powder (serving as micro-sized particles) was used as the starting materials. Strengthening of the copper matrix was performed by treating the powders in the air for up to 20 h in the planetary ball mill. During milling of the prealloyed powder, finely dispersed nano-sized Al2O3 particles were formed in situ by internal oxidation. The approximate size of these particles was between 30 and 60 nm. The highest values of microhardness were reached in compacts processed from 10 h-milled powders. The microhardness of compact obtained from 10 h-milled powder was 3 times higher than the microhardness of compact processed from as-received and non-milled prealloyed powder. At the maximum microhardness the grain size reaches the smallest value as a result of the synergetic effect of nano- and micro-sized Al2O3 particles. Recrystallization, which occurred during prolonged milling, was the main factor influencing the decrease in microhardness. The increase in electrical conductivity of compacts after 15 h of milling is the result of the decrease in microhardness and activated recrystallization processes. (C) 2012 Elsevier Inc. All rights reserved.", journal = "Materials Characterization", title = "Characteristic of copper matrix simultaneously reinforced with nano- and micro-sized Al2O3 particles", volume = "67", pages = "129-137", doi = "10.1016/j.matchar.2012.02.022" }
Rajković, V. M., Božić, D., Devečerski, A.,& Jovanović, M. T.. (2012). Characteristic of copper matrix simultaneously reinforced with nano- and micro-sized Al2O3 particles. in Materials Characterization, 67, 129-137. https://doi.org/10.1016/j.matchar.2012.02.022
Rajković VM, Božić D, Devečerski A, Jovanović MT. Characteristic of copper matrix simultaneously reinforced with nano- and micro-sized Al2O3 particles. in Materials Characterization. 2012;67:129-137. doi:10.1016/j.matchar.2012.02.022 .
Rajković, Višeslava M., Božić, Dušan, Devečerski, Aleksandar, Jovanović, Milan T., "Characteristic of copper matrix simultaneously reinforced with nano- and micro-sized Al2O3 particles" in Materials Characterization, 67 (2012):129-137, https://doi.org/10.1016/j.matchar.2012.02.022 . .