Sintered electric contact material for vacuum switch tube and pr

Details Sintered electric contact material for vacuum switch tube and pr Sintered electric contact material for vacuum switch tube and pr

1990-05-17

1991-05-28

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75247, 419 23, 419 38, 419 48, 419 57, 419 58, B22F 900

Patent

active

050191560

ABSTRACT:
A sintered electric contact material for use in vacuum switch tubes comprises about 50 to 70% by volume of a Cr powder, about 0.1 to 1.15% by volume of a Ti powder, and the remainder of a Cu powder. The sintered material can be obtained advantageously by heating a mixture of the Cr powder, the Ti powder and the Cu powder in a non-oxidizing atmosphere under pressure, at a temperature below the melting point of Cu (the melting point is 1083.degree. C. at normal pressure).

REFERENCES:
patent: 3957453 (1976-05-01), Hassler et al.
patent: 4503010 (1985-03-01), Kippenberg et al.

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