Properties of Dispersion-Hardened Copper Made by Internal Oxidation of Prealloyed Copper Powder Containing 2.5 wt. % Al

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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.

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Edited by:

Dragan P. Uskokovic, Slobodan K. Milonjic, Djan I. Rakovic

Pages:

493-498

Citation:

V. Rajković et al., "Properties of Dispersion-Hardened Copper Made by Internal Oxidation of Prealloyed Copper Powder Containing 2.5 wt. % Al ", Materials Science Forum, Vol. 494, pp. 493-498, 2005

Online since:

September 2005

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$38.00

[1] M.L. Mehta, T.K.A. Ghudbban, M.S.B. Eltalhi, N.E.A. Elraby, Powder Metallurgy International, 22 (1990), p.15.

[2] B. Hutchinson, R. Sunberg, M. Sunber, in: Copper 90-Refining, Fabrication, Markets, p.245, Institute of Metals, Sweden (1990).

[3] H. Schreiner, H. Ohman, U.S. Patent No. 3, 488. 183.

[4] A.V. Nadkarni, J.E. Synk, Metals Handbook, p.711, ASM, Metals Park, OH, (1984).

[5] A. Upadhyaya, G.S.A.V. Upadhyaya, Materials & Design, 16 (1995), p.41.

[6] V. Rajkovic, N. Ilic, M. Mitkov, in: Powder Metallurgy World Congress, p.432, European Powder Metallurgy Association, (1998).

[7] V.M. Rajković M.V. Mitkov, The International Journal of Powder Metallurgy, 36 (2000), p.45.

[8] V. Rajković, E. Romhanji, M. Mitkov, Journal of Materials Science Letters, 21 (2002), p.169.

[9] B. Lonnberg, Journal of Materials Science, 29 (1994), p.3224.

[10] G. Ziegler, Powder Metallurgy International, 10 (1978), p.70.

[11] J.S. Benjamin, Metallurgical Transaction, 1 (1970), p.2943.

[12] R. Mould, P. Coterill, Journal of Material Science, 2 (1967), p.241.

[13] O. Preston, N.J. Grant, Transaction of the Metallurgical Society of AIME, 221 (1961), p.173.

[14] N.J. Grant, M. Lou, in High Conductivity Copper and Aluminium Alloys, p.103, The Metallurgical Society of AIME, California (1984).

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