PURPOSE: To produce an electrical contact and sliding material having a surface part dispersed uniformly with borides and having excellent performance, by penetrating and dispersing B in a metallic material having the surface layer part consisting of a thin layer contg. gold, silver, etc. and Be, Mg, Al, etc.
CONSTITUTION: ≥1 Kinds among Be, Mg, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Ga, As, Zr, Nb, Mo, Pd, Cd, Ta, W and Pt are coated on the surface of gold, silver gold alloy, or silver alloy which is a base material by electroplating or the like; thereafter, the material is heat-treated to diffuse said element into the surface layer part, and metallic material of which the surface layer part from at least the surface down to 0.01W0.1mm depth contains 0.5W40atom% the above-mentioned elements as an alloy or fine particles and the balance is gold, silver gold alloy, or silver alloy is obtd. B is penetrated and diffused in such metallic material to form the fine particles consisting of the borides of the above-mentioned elements in the surface layer part of the metallic material, whereby the boride diffused alloy is produced and a metallic material suited for an electrical contact material, a sliding material, etc. is obtd.
MIZUNO JIROU
ARAI TOORU
KASUYA OSAMI
OONO KOUICHI
ANDOU HISAHIRO
TOKAI RIKA CO LTD
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