Electric contact material and a manufacturing method therefor

Details Electric contact material and a manufacturing method therefor Electric contact material and a manufacturing method therefor

1996-02-22

1998-09-01

Lam, Cathy F.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428547, 428548, 428637, 428673, 252514, B32B 1500, B32B 1518, B22F 300, B22F 700

Patent

active

058009329

ABSTRACT:
Disclosed is an electric contact material which comprises a contact substrate and a coating layer formed integrally on the surface of the contact substrate. The coating layer is formed of an Ag-Li-La alloy containing Au or/and Pd, and has a surface layer portion formed as a concentration gradient layer whose Au or/and Pd content decreases as a subsurface portion is approached. The Au or/and Pd concentration of the surface of the surface layer portion ranges from 50 to 95% by weight. The contact material is manufactured by forming an Au or/and Pd layer on the Ag-Li-La alloy and then heat-treating the whole resulting structure, thereby thermally diffusing the Au or/and Pd. This electric contact material has excellent corrosion resistance and lubricity, and its contact resistance changes little with time.

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patent: 5415944 (1995-05-01), Kazem-Goudarzi et al.
patent: 5422190 (1995-06-01), Alexander

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