Patent ID: 9281136
Filing Date: 2016-03-08
CPC Classification: B22F,C22C,H01B,H01H

Claim Text:
1. A method for producing an electrode material for vacuum circuit breaker, comprising the steps of: mixing Mo powder having a particle diameter of 0.8 to 6 μm with a thermite Cr powder having a particle diameter of 40 to 300 μm homogeneously in such a manner as giving a mixing ratio (Mo:Cr) of 1:1 to 9:1 and satisfying the weight relation Mo≧Cr; press-sintering wherein the resultant mixture is pressure molded under a press pressure of 1 to 4 t/cm2 to give a molded article, which is sintered by being maintained at a temperature of 1100 to 1200° C. for 1 to 2 hours to form a partially sintered article of a sintered alloy of Mo—Cr; and infiltrating Cu into said partially sintered article obtained in said press-sintering step by placing a thin Cu plate on said partially sintered article and maintaining them at a temperature of 1100 to 1200° C. for 1 to 2 hours so that the Cu is liquid-phase sintered and infiltrated into said partially sintered article and a Cu—Cr—Mo material is formed in which the Cu is infiltrated into the sintered alloy of Mo—Cr.