Prealloyed copper powder containing 2.5wt. %Al was processed in a planetary ball mill to evaluate matrix hardening due to formation of Al2O 3 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:
Materials Science Forum, 2005, 494, 493-498
Publisher:
6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes
TY - JOUR
AU - Rajković, Višeslava M.
AU - Božić, D.
AU - Vračarić, D.
AU - Romhanji, Endre
PY - 2005
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/739
AB - Prealloyed copper powder containing 2.5wt. %Al was processed in a planetary ball mill to evaluate matrix hardening due to formation of Al2O 3 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 - 6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes
T2 - Materials Science Forum
T1 - Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al
EP - 498
SP - 493
VL - 494
DO - 10.4028/0-87849-971-7.493
ER -
@article{
author = "Rajković, Višeslava M. and Božić, D. and Vračarić, 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 Al2O 3 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 = "6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes",
journal = "Materials Science Forum",
title = "Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al",
pages = "498-493",
volume = "494",
doi = "10.4028/0-87849-971-7.493"
}
Rajković, V. M., Božić, D., Vračarić, D.,& Romhanji, E.. (2005). Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al. in Materials Science Forum
6th Conference of the Yugoslav Materials Research Society, YUCOMAT VI: Current Research in Advanced Materials and Processes., 494, 493-498.
https://doi.org/10.4028/0-87849-971-7.493
Rajković VM, Božić D, Vračarić D, Romhanji E. Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al. in Materials Science Forum. 2005;494:493-498.
doi:10.4028/0-87849-971-7.493 .
Rajković, Višeslava M., Božić, D., Vračarić, D., Romhanji, Endre, "Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al" in Materials Science Forum, 494 (2005):493-498,
https://doi.org/10.4028/0-87849-971-7.493 . .
