Contact material for vacuum switches and process for manufacturi

Details Contact material for vacuum switches and process for manufacturi Contact material for vacuum switches and process for manufacturi

1990-01-19

1991-03-05

Roy, Upendra

Alloys or metallic compositions

Copper base

Sulfur, selenium, or tellurium containing

75 1023, 148 115P, C22B 400, H01H 102

Patent

active

049976249

ABSTRACT:
Contact materials for vacuum switches with the base constituents copper and chromium and additive constituents containing tellurium or selenium and in which copper-telluride (Cu.sub.2 Te) or copper-selenide (Cu.sub.2 Se) are formed as a binary intermetallic phase are known. According to the invention, the additive constituent is a ternary intermetallic phase composed of copper, chromium and tellurium or copper, chromium and selenium with a tellurium or selenium content which is greater than that of the known binary intermetallic phases. This results in a reduction of the chopping currents in the contact pieces manufactured from the contact material according to the invention and causes the overvoltage performance to be enhanced.

REFERENCES:
patent: 3596027 (1971-07-01), Okutomi et al.
patent: 4749830 (1988-06-01), Kippenberg et al.
patent: 4853184 (1989-08-01), Naya et al.
patent: 4906291 (1990-03-01), Moser et al.
patent: 4927989 (1990-05-01), Naya et al.

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