Structure and characteristic of metallic film coated by using electrical discharge

Abstract

Electrical discharge surface treatment hereafter called MSCoating (Micro Spark Coating) has been developed. The influence on the tensile adhesive strength of the electrode density and the surface roughness was examined. Cobalt-Chromium (Co-Cr) alloy film was formed by the MSCoating on the surface of different roughness nickel (Ni) alloy workpiece. As a result, tensile adhesive strength is independent of the surface roughness. On the other hand , the film formation speed and tensile adhesive strength depend on the electrode density. Therefore, using higher density electrode, film formation speed is lower and tensile adhesive strength is higher.