Contact material for vacuum valve

Details Contact material for vacuum valve Contact material for vacuum valve

1993-05-28

1995-04-25

Mai, Ngoclan T.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75247, 200262, 200264, 252514, 252520, C22C 900, C22C 3002

Patent

active

054095190

ABSTRACT:
A contacts material for a vacuum valve including an arc-proof constituent having at least one component selected from the group consisting of tantalum, niobium, tungsten and molybdenum and an auxiliary constituent having at least one component selected from the group consisting of chromium, titanium, yttrium, zirconium, cobalt and vanadium. The contact material further includes a conductive constituent having at least one component selected from the group consisting of copper and silver. The amount of the arc-proof constituent is from 25% to 75% by volume. The total amount of the arc-proof constituent together with the auxiliary constituent is no more than 75% by volume. The amount of the conductive constituent is the balance.

REFERENCES:
patent: 4486631 (1984-12-01), Naya et al.
patent: 4777335 (1988-10-01), Okutomi et al.
patent: 4830821 (1989-05-01), Okutomi et al.
patent: 5045281 (1991-09-01), Okutomi et al.

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