Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al(Conference Paper)
- aVinca Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia
- bMilitary Technical Institute, 1100 Belgrade, Serbia
- cFaculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
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.
Indexed keywords
| Engineering controlled terms: | Ball millingDispersion hardeningHeat treatmentMicrohardnessOxidationPowder metals |
|---|---|
| Engineering uncontrolled terms | Copper matrix hardeningDispersion-hardened copperHigh energy ball milling |
| Engineering main heading: | Copper |
- ISSN: 02555476
- ISBN: 0878499717;978-087849971-7
- CODEN: MSFOE
- Source Type: Book Series
- Original language: English
- DOI: 10.4028/0-87849-971-7.493
- Document Type: Conference Paper
- Publisher: Trans Tech Publications Ltd
Rajković, V.; Vinca Institute of Nuclear Sciences, P.O. Box 522, Serbia;
© Copyright 2020 Elsevier B.V., All rights reserved.
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