Resistance Sintering of Copper-Graphite Powder Mixture under Pressure

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Resistance sintering characteristics of electrolytic and atomized copper powders mixed with graphite powder in steps of 10vol% up to 50vol% were experimentally investigated. In the experiments electrifying voltage and time, and applied pressure were varied. Post-electrification pressurization and insertion of low thermal conductive austenitic stainless steel discs between the sintering powder cake and electrodes were attempted to promote the sintering. The effects of the operational parameters including the two devices on sintering performance are discussed. Sintering strength of the resistance-sintered composites is also discussed.

Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi

Pages:

281-284

Citation:

S. Maki et al., "Resistance Sintering of Copper-Graphite Powder Mixture under Pressure", Materials Science Forum, Vols. 449-452, pp. 281-284, 2004

Online since:

March 2004

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$38.00

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2 4 6 8 10.

[40] [80] 120 Input heat / kJ Fracture strength / MPa Parallel Perpendicular 0. 6 0. 7 0. 8 0. 9.

[20] [40] [60] [80] Relative sintered density Vickers hardness / HV9. 8 no post–pressing post–pressing 1. 0 Without disc, no post–pressing With disc.

200 400 600 800.

0. 5 1 Time / s Heating temperature / � With disc Without disc (a) E=7V PE=19. 6MPa T=1s.

[1] [2] [3] [4] [5] [0] 0. 5 1 Time / s Input heat / kJ With disc Without disc (b).

200 400 600 800.

0. 5 1 Time / s Heating temperature / � With disc Without disc (a) E=7V PE=19. 6MPa T=1s.

[1] [2] [3] [4] [5] [0] 0. 5 1 Time / s Input heat / kJ With disc Without disc (b) post-pressing no Post-pressing Without disc, No post-pressing.

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