Sintered composite material for electrical contact

Details Sintered composite material for electrical contact Sintered composite material for electrical contact

1988-04-25

1990-04-24

Lechert Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75243, 75247, 419 23, 428675, B22F 700

Patent

active

049197177

ABSTRACT:
Sintered composite material containing 80% to 95% weight of copper, 2% to 15% weight of nickel and 2% to 5% weight of graphite, designed for the manufacture of electrical contact pads for low voltage switchgear devices. The copper powder can be of a spongy form having an average diameter of less than 24 .mu.m, an oxygen content of lower than 2000 ppm and a purity in metallic elements of 99.5%. The graphite powder can be of pellicular form, having particles about 100 .mu.m in length and 20 .mu.m in thickness, and an ash content of less than 0.2 ppm. The nickel powder can be of a spheroid shape having an average diameter of less than 5 .mu.m.

REFERENCES:
patent: 4498395 (1985-02-01), Kock et al.
patent: 4622269 (1986-11-01), Leung et al.
F. V. Lenel, Powder Metallurgy Principles and Applications, Apr. 1980, pp. 33-44.

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