Characterization of prealloyed copper powders treated in high energy ball mill
Апстракт
The inert gas atomised prealloyed copper powders containing 3.5 wt.% Al were milled up to 20 h in the planetary ball mill in order to oxidize alurniniurn in situ with oxygen from the air. In the next procedure compacts from milled powder were synthesized by hot-pressing in argon atmosphere. Compacts from as-received Cu-3.5 wt.% Al powder and electrolytic copper powder were also prepared under the same conditions. Microstructural and morphological changes of high energy milled powder as well as changes of thermal stability and electrical conductivity of compacts were studied as a function of milling time and high temperature exposure at 800 degrees C. Optical, scanning electron microscopy (SEM) and X-ray diffraction analysis were performed for microstructural characterization, whereas thermal stability and electrical conductivity were evaluated by microhardness measurements and conductometer Sigmatest, respectively. The prealloyed 5 h-milled and compacted powder showed a significant inc...rease in microhardness reaching the value of 2600 MPa, about 4 times greater than that of compacts synthesized from as-received electrolytic copper powder (670 MPa). The electrical conductivity of compacts from 5 h-milled powder was 52% IACS. The results were discussed in terms of the effect of small grain size and finely distributed alumina dispersoids on hardening and thermal stability of compacts. (c) 2006 Elsevier Inc. All rights reserved.
Кључне речи:
Cu-3.5 wt.% Al prealloyed powder / high energy milling / grain size / hardening / electrical conductivityИзвор:
Materials Characterization, 2006, 57, 2, 94-99
DOI: 10.1016/j.matchar.2005.12.011
ISSN: 1044-5803
WoS: 000239111500004
Scopus: 2-s2.0-33745249907
Колекције
Институција/група
VinčaTY - JOUR AU - Rajković, Višeslava M. AU - Božić, Dušan AU - Jovanović, Milan T. PY - 2006 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3042 AB - The inert gas atomised prealloyed copper powders containing 3.5 wt.% Al were milled up to 20 h in the planetary ball mill in order to oxidize alurniniurn in situ with oxygen from the air. In the next procedure compacts from milled powder were synthesized by hot-pressing in argon atmosphere. Compacts from as-received Cu-3.5 wt.% Al powder and electrolytic copper powder were also prepared under the same conditions. Microstructural and morphological changes of high energy milled powder as well as changes of thermal stability and electrical conductivity of compacts were studied as a function of milling time and high temperature exposure at 800 degrees C. Optical, scanning electron microscopy (SEM) and X-ray diffraction analysis were performed for microstructural characterization, whereas thermal stability and electrical conductivity were evaluated by microhardness measurements and conductometer Sigmatest, respectively. The prealloyed 5 h-milled and compacted powder showed a significant increase in microhardness reaching the value of 2600 MPa, about 4 times greater than that of compacts synthesized from as-received electrolytic copper powder (670 MPa). The electrical conductivity of compacts from 5 h-milled powder was 52% IACS. The results were discussed in terms of the effect of small grain size and finely distributed alumina dispersoids on hardening and thermal stability of compacts. (c) 2006 Elsevier Inc. All rights reserved. T2 - Materials Characterization T1 - Characterization of prealloyed copper powders treated in high energy ball mill VL - 57 IS - 2 SP - 94 EP - 99 DO - 10.1016/j.matchar.2005.12.011 ER -
@article{ author = "Rajković, Višeslava M. and Božić, Dušan and Jovanović, Milan T.", year = "2006", abstract = "The inert gas atomised prealloyed copper powders containing 3.5 wt.% Al were milled up to 20 h in the planetary ball mill in order to oxidize alurniniurn in situ with oxygen from the air. In the next procedure compacts from milled powder were synthesized by hot-pressing in argon atmosphere. Compacts from as-received Cu-3.5 wt.% Al powder and electrolytic copper powder were also prepared under the same conditions. Microstructural and morphological changes of high energy milled powder as well as changes of thermal stability and electrical conductivity of compacts were studied as a function of milling time and high temperature exposure at 800 degrees C. Optical, scanning electron microscopy (SEM) and X-ray diffraction analysis were performed for microstructural characterization, whereas thermal stability and electrical conductivity were evaluated by microhardness measurements and conductometer Sigmatest, respectively. The prealloyed 5 h-milled and compacted powder showed a significant increase in microhardness reaching the value of 2600 MPa, about 4 times greater than that of compacts synthesized from as-received electrolytic copper powder (670 MPa). The electrical conductivity of compacts from 5 h-milled powder was 52% IACS. The results were discussed in terms of the effect of small grain size and finely distributed alumina dispersoids on hardening and thermal stability of compacts. (c) 2006 Elsevier Inc. All rights reserved.", journal = "Materials Characterization", title = "Characterization of prealloyed copper powders treated in high energy ball mill", volume = "57", number = "2", pages = "94-99", doi = "10.1016/j.matchar.2005.12.011" }
Rajković, V. M., Božić, D.,& Jovanović, M. T.. (2006). Characterization of prealloyed copper powders treated in high energy ball mill. in Materials Characterization, 57(2), 94-99. https://doi.org/10.1016/j.matchar.2005.12.011
Rajković VM, Božić D, Jovanović MT. Characterization of prealloyed copper powders treated in high energy ball mill. in Materials Characterization. 2006;57(2):94-99. doi:10.1016/j.matchar.2005.12.011 .
Rajković, Višeslava M., Božić, Dušan, Jovanović, Milan T., "Characterization of prealloyed copper powders treated in high energy ball mill" in Materials Characterization, 57, no. 2 (2006):94-99, https://doi.org/10.1016/j.matchar.2005.12.011 . .