Electrode material

Details Electrode material Electrode material

1994-04-26

1996-02-06

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder shape or size characteristics

419 38, 419 47, C22F 114, H01B 102, H01H 3366

Patent

active

054894123

ABSTRACT:
A process for forming an electrode assembled into a vacuum interrupter is composed of the steps of blending silver(Ag) powder and chromium(Cr) powder in a content ratio such that Ag powder forms a matrix and Cr powder being dispersed therein, the blending ratio is prefer to be determined to contain 50 to 95 wt. % of Ag powder and 5 to 50 wt. % of Cr powder, compacting the blended powder to a compacted body, sintering the body at temperatures around melting point of Ag, and regulating density of the sintered article at least 90%. Particle size of Cr to be blended may be determined less than 150 .mu.m, more preferably, less than 60 .mu.m. Sintering temperature may be determined between 800.degree. to 950.degree. C.

REFERENCES:
patent: 4008081 (1977-02-01), Hundstad
patent: 4048117 (1977-09-01), Emmerich
patent: 4190753 (1980-02-01), Gainer
patent: 4810289 (1989-03-01), Hoyer et al.
U.S. patent application Ser. No. 07/738,189 for Electrode Contact Material, by Yasushi Noda et al., Filed Jul. 30, 1991.
U.S. patent application Ser. No. 07/965,203 for Process For Forming Contact Material, by Nobuyuki Yoshioka et al., Filed Oct. 23, 1992.

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