Properties of dispersion-hardened copper made by internal oxidation of prealloyed copper powder containing 2.5wt. % Al
| Autor: | D. Vračarić, E. Romhanji, Viseslava Rajkovic, D. Božić |
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| Rok vydání: | 2005 |
| Předmět: |
Copper oxide
Materials science high energy ball milling dispersion-hardened copper chemistry.chemical_element 02 engineering and technology Hot pressing Indentation hardness chemistry.chemical_compound General Materials Science Internal oxidation Ball mill Inert 020502 materials Mechanical Engineering Metallurgy 021001 nanoscience & nanotechnology Condensed Matter Physics Copper 0205 materials engineering chemistry Mechanics of Materials Hardening (metallurgy) copper matrix hardening 0210 nano-technology internal oxidation in air |
| Zdroj: | Materials Science Forum Current Research in Advanced Materials and Processes |
| Popis: | 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. Current Research in Advanced Materials and Processes, 6th Conference of the Yugoslav-Materials-Research-Society, Sep 13-17, 2004, Herceg Novi, Montenegro |
| Databáze: | OpenAIRE |
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