Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1977-12-23
1979-05-08
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75211, 75235, 200265, 200270, B22F 300, H01H 102
Patent
active
RE0299863
ABSTRACT:
A material for use in making electrical contacts is produced in a powder form suitable for later processing into electrical contacts by standard metallurgical techniques. The material consists of a first metal, such as silver, and the oxide of a second metal, such as cadmium, added to the first metal in a proportion up to the limits of solubility of the second metal in the first metal. An oxide of a third metal having a low electronic work function level, such as lithium oxide, is added and uniformly distributed on the surfaces of the powder particles by precipitation. A fourth metal, such as tellurium, that is insoluble in the first metal is also added to provide selected characteristics.
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Shen et al., The Effect of Additives From Group 1A & 11A on Morphology & Properties of Silver-Cadmium Oxide Contacts, 1971, Seventeenth Annual Holm Seminar.
Broadwarow, Proceedings 5th International Conference on Electrical Contact Phenomena, Munich, May 1970.
Davies Terrence A.
Pedder David J.
Guttman Richard T.
Hunt Brooks H.
Schmeling William H.
Square D Company
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