Vacuum type breaker contact material of copper infiltrated tungs

Details Vacuum type breaker contact material of copper infiltrated tungs Vacuum type breaker contact material of copper infiltrated tungs

1982-03-22

1984-02-07

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

200264, 200265, 428569, 428567, H01H 102, B22F 326

Patent

active

044301243

ABSTRACT:
This invention provides a vacuum type breaker contact material prepared by infiltrating copper into a sintered tungsten matrix, wherein elementary particle size and the growth of the particle size by heat processing are controlled in such a manner that the ratio of the largest value/the smallest value of tungsten particle size becomes not more than 10, and that the maximum value of tungsten particle size is not larger than 2 .mu.m and the minimum value of tungsten particle size is not smaller than 0.3 .mu.m.

REFERENCES:
patent: 3449120 (1969-06-01), Zdanuk et al.
patent: 3929424 (1975-12-01), Krock et al.
patent: 4162160 (1979-07-01), Witter
patent: 4299889 (1981-11-01), Kato et al.
patent: 4372783 (1983-02-01), Kato

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