Electrical contact material of TiC, WC and silver

Details Electrical contact material of TiC, WC and silver Electrical contact material of TiC, WC and silver

1977-02-24

1979-01-30

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

200264, 200265, 200266, 200270, 428545, 428929, H01H 102, B22F 500

Patent

active

041370767

ABSTRACT:
An electrical contact suitable for use in high-current switching or circuit breaking, comprising a mixture of silver or copper with an alloy of tungsten carbide and titanium carbide. The contact material preferably uses from about 10% to about 90% silver by weight, the remainder being (WTi)C alloy, and preferably the alloy component comprises from about 35% to about 50% of WC, the remainder of the alloy being TiC. The contact is preferably made by a powder metallurgical process, and provides not only good impact resistance, weld resistance and erosion resistance but, even more importantly, provides low contact resistance, i.e. low electrical resistance when current flows through the closed contacts even after repeated cycling, as shown by the low temperature rise of the contact in use.

REFERENCES:
patent: 2768099 (1956-10-01), Hoyer
patent: 3482950 (1969-12-01), Kosco
patent: 3985512 (1976-10-01), Hassler et al.

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