Prealloyed copper powder containing 2.5wt. %Al was processed in a planetary ball mill to evaluate matrix hardening due to formation of Al2O3 particles in situ by internal oxidation. After milling, the powders were heat treated in hydrogen in order to reduce copper oxide formed on particle surfaces during milling. The compacts were made by hot pressing. The examinations show that the compacts possess a good combination of high strength and high electrical conductivities. After 5h of milling the microhardness of the prealloyed compact was 3 to 4 times higher than that of the as-received electrolytic copper compacted under the same conditions, while the conductivity was 68% IACS. Also, it was found that the prealloyed compacts preserved much of the hardness after exposure to high temperature in inert atmospheres.
Keywords:
copper matrix hardening / dispersion-hardened copper / high energy ball milling / internal oxidation in air
Source:
Current Research in Advanced Materials and Processes, 2005, 494, 493-497
TY - JOUR
AU - Rajković, Višeslava M.
AU - Božić, Dušan
AU - Vracarić, D
AU - Romhanji, Endre
PY - 2005
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/852
AB - Prealloyed copper powder containing 2.5wt. %Al was processed in a planetary ball mill to evaluate matrix hardening due to formation of Al2O3 particles in situ by internal oxidation. After milling, the powders were heat treated in hydrogen in order to reduce copper oxide formed on particle surfaces during milling. The compacts were made by hot pressing. The examinations show that the compacts possess a good combination of high strength and high electrical conductivities. After 5h of milling the microhardness of the prealloyed compact was 3 to 4 times higher than that of the as-received electrolytic copper compacted under the same conditions, while the conductivity was 68% IACS. Also, it was found that the prealloyed compacts preserved much of the hardness after exposure to high temperature in inert atmospheres.
PB - Trans Tech Publications Ltd, Durnten-Zurich
T2 - Current Research in Advanced Materials and Processes
T1 - Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al
EP - 497
SP - 493
VL - 494
DO - 10.4028/www.scientific.net/MSF.494.493
ER -
@article{
author = "Rajković, Višeslava M. and Božić, Dušan and Vracarić, D and Romhanji, Endre",
year = "2005",
abstract = "Prealloyed copper powder containing 2.5wt. %Al was processed in a planetary ball mill to evaluate matrix hardening due to formation of Al2O3 particles in situ by internal oxidation. After milling, the powders were heat treated in hydrogen in order to reduce copper oxide formed on particle surfaces during milling. The compacts were made by hot pressing. The examinations show that the compacts possess a good combination of high strength and high electrical conductivities. After 5h of milling the microhardness of the prealloyed compact was 3 to 4 times higher than that of the as-received electrolytic copper compacted under the same conditions, while the conductivity was 68% IACS. Also, it was found that the prealloyed compacts preserved much of the hardness after exposure to high temperature in inert atmospheres.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Current Research in Advanced Materials and Processes",
title = "Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al",
pages = "497-493",
volume = "494",
doi = "10.4028/www.scientific.net/MSF.494.493"
}
Rajković, V. M., Božić, D., Vracarić, D.,& Romhanji, E.. (2005). Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al. in Current Research in Advanced Materials and Processes
Trans Tech Publications Ltd, Durnten-Zurich., 494, 493-497.
https://doi.org/10.4028/www.scientific.net/MSF.494.493
Rajković VM, Božić D, Vracarić D, Romhanji E. Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al. in Current Research in Advanced Materials and Processes. 2005;494:493-497.
doi:10.4028/www.scientific.net/MSF.494.493 .
Rajković, Višeslava M., Božić, Dušan, Vracarić, D, Romhanji, Endre, "Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al" in Current Research in Advanced Materials and Processes, 494 (2005):493-497,
https://doi.org/10.4028/www.scientific.net/MSF.494.493 . .
