Electrical contact material

Abstract

Abstract PURPOSE:To obtain an electrical contact material having superior melt sticking resistance, hardly dissipative property and insulation resistance by dispersing the nitride of a specified metal and graphite in an iron group metal and silver and solubilizing part or all of the metallic nitride in the iron group metal. CONSTITUTION:A powdered mixture consisting of 5-50wt% powder of the nitride of at least 1 kind of metal belonging to the IVa, Va, VIa, VIIa or VIII group in the periodic table such as Ti, Zr, Nb, Cr, Mo, Mn, Fe, V or Ta, 2-60wt% powder of at least 1 kind of iron group metal such as Ni, Fe or Co, 1-11wt% graphite powder, and the balance Ag powder is compacted, sintered in a hydrogen atmosphere, and compacted again to manufacture an alloy having porosity close to zero. In the sintering stage, the iron group metal reacts with the metallic nitride, whereby the metallic nitride is solubilized in the iron group metal, and an electrical contact material having superior heat resistance and satisfactory hardly arc dissipative property is obtd.

Inventors

• 👤 Akira Fukui
• 👤 彰 福井
• 👤 Yoshinari Amano
• 👤 良成 天野
• 👤 Mitsuo Osada
• 👤 光生 長田
• 👤 Atsushi Kuroishi
• 👤 黒石　農士

Bibliographic Details