Method for forming an electrical contact material

Details Method for forming an electrical contact material Method for forming an electrical contact material

1991-07-30

1996-01-02

Simmons, David A.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

75352, 75355, 75369, 148411, 148432, 419 5, 420495, 420590, 428546, B22F 300

Patent

active

054804728

ABSTRACT:
A method for forming an electrical contact material comprises the steps of melting a mixture of Cu and Cr into a molten alloy, atomizing the molten alloy into fine particles to obtain alloyed particles. Cr particles in the alloyed powder disintegrate to less than 5 .mu.m in mean particle diameter. The alloyed powder is sintered thereafter and a mean particle diameter of chromium in the sintered article is fined in a range of 2 to 20 .mu.m. An electrical contact material is composed of a copper matrix and chromium particles having a mean particle diameter of 2 to 20 .mu.m. The chromium particles are homogeneously dispersed in the copper matrix.

REFERENCES:
patent: 4911769 (1990-03-01), Yamada et al.

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