| 摘要 |
PROBLEM TO BE SOLVED: To improve the reliability while lowering dispersion of the circuit- breaking performance and the withstand voltage performance by forming an arc electrode member of a high conductive metal and a fire resistant metal having a melting point higher than that of the high conductive metal, and using the high conductive metal and the fire resistant metal having flat particle shape. SOLUTION: An arc electrode 1 is made of the compound alloy obtained by thermally spraying the mixture powder of the high conductive metal and the fire resistant metal, and the arc electrode 1, an electrode support 2, a back conductor 4 and an external conductor connection part 3 are integrally formed with each other by diffusion of the high conductive metal. As an electrode member to be used, the metal powder composed of one or two kinds of Cu, Au, Ag as a high conductive metal, one or two kinds of Cr, W, Mo, Fe as a fire resistant metal and one or more kinds of Nb, V, Ti having effective withstand voltage performance is used. Each metal powder is mixed, and laminated for coating on a rough surface part of a material to be thermally sprayed with the mixture powder, and fine chrome particles are evenly distributed in the matrix of the flat copper particles.
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