Electrical contacts for vacuum circuit breakers and methods...

Details Electrical contacts for vacuum circuit breakers and methods... Electrical contacts for vacuum circuit breakers and methods...

2006-07-06

2010-02-16

King, Roy (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

C075S236000, C218S123000, C218S124000, C218S125000, C218S128000, C218S132000

Reexamination Certificate

active

07662208

ABSTRACT:
An electrical contact used herein comprises chromium; one of copper and silver; and a carbide, in which the electrical contact comprises a matrix and chromium, the matrix phase mainly comprising one of copper and silver, and the chromium being surrounded by the carbide and dispersed in the matrix. The electrical contact contains 1 to 30 percent by weight of a carbide, with the balance being copper. Another electrical contact contains chromium, copper, and a carbide and has a weight ratio of chromium to the carbide within the range of 1:1.5 to 1:50.

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