Low wear high current density sliding electrical contact materia

Details Low wear high current density sliding electrical contact materia Low wear high current density sliding electrical contact materia

1979-01-10

1981-03-17

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75173A, 75231, 75232, 75233, 75235, 75246, 252 11, 252 12, C10M 500, C10M 700

Patent

active

042564891

ABSTRACT:
A solid, self lubricating bearing material especially useful as a sliding electrical contact in vacuum environments comprising a high temperature lubricant chosen from AlPO.sub.4, BaF.sub.2, CaF.sub.2 and mixtures thereof, a lower temperature solid lubricant chosen from the chalcogenides which exhibit lubricity, & a silver matrix, the ratio of high temperature lubricant to silver being about 1:4 to 1:10, the ratio of lower temperature lubricant to silver being about 1:2 to 1:8. Filler materials up to 20% by weight chosen from aluminum oxide, silicon nitride, molybdenum silicide, metals from Group 8 of the Periodic Table, and mixtures thereof may be added to alter the hardness of the material.

REFERENCES:
patent: 3755164 (1973-08-01), Van Wyk
patent: 3956146 (1976-05-01), Tsuya et al.

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