| 摘要 |
PURPOSE:To obtain powder which has good conductivity and high hardness and is suitable as a material for contact, etc. by forming a plating layer on a metallic plate with a Pd-Ni alloy plating soln. contg. WC powder and stripping and disintegrating the same. CONSTITUTION:A Pd-Ni alloy plating soln. 1 and WC powder 2 are mixed 3, and are plated 4 on a metallic plate. The resulting plating layer is stripped 5 from the metallic plate and is disintegrated 6 by a suitable method. Then a powdery material 9 formed with a Pd-Ni alloy layer 7 on the surface of the WC powder 2 is thus obtd. Since the material 9 consists of WC particles of high hardness as a core material, it has an excellent mechanical strength such as wear resistance or the like and since it has the Pd-Ni alloy coating layer which is a noble metal on the surface part thereof, the material is resistant to corrosion by atmosphere gas and has excellent conductivity. The Pd-Ni alloy coating layer is formed by a composite plating method and has therefore extremely high adhesion strength to the WC particles. |
