Method of forming composite electrical contacts having...

Details Method of forming composite electrical contacts having... Method of forming composite electrical contacts having...

H - Electricity

01

H

H01H 1/02 (2006.01) H01B 1/02 (2006.01)

Patent

CA 2059919

RD-19,547 ABSTRACT OF THE DISCLOSURE Improved composite electrical contacts are comprised of about 0.5 to 50 volume percent of a carbonaceous secondary phase, and the remainder a conductor metal matrix, the metal matrix being substantially free of carbon in the matrix grain boundaries. The composite contacts are formed by providing a powder comprised of a predetermined volume percent of the carbonaceous particles, and the remainder the conductor metal, the carbonaceous particles having a coating of a metal from the group consisting of silver, nickel, chromium, and mixtures thereof sufficient to minimize flaking of carbon from the carbonaceous particles. The powder is consolidated into a compact, and sintered in a reducing atmosphere or vacuum to increase density without causing substantial gas formation within the compact.

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