No.7（2004）2.Electrical discharge coating using electroconductive ceramics

Takemi SUZUKI, Minoru YAMAZAKI, Nobuhiro NIHIRA, Akio MOTOI

The purpose of this study is to develop an electrical discharge coating technology used for sticking hard films on electrodes making use of electroconductive ceramics. A NC die sinking electric discharge machine is used and we varied the experimental conditions such as electrode materials and working fluids . The states of the electrodes following the experiments show that (1) the adhesion of the electrical discharge films to the electrodes were observed in all experiments; (2)all of the frictional coefficients of Cu electrodes became smaller and those of Fe electrodes became larger because of this processing; (3) the most suitable ceramics for the film adhesion are SiAlON; (4) the adhesion films stick stronger to the electrodes than those formed by other techniques and are 2-4μm in thickness; (5) the technique developed in this study can be applied to bearings and sliding surfaces.

Keywords
Electroconductive ceramics, Coating, Electrical discharge film, SiAlON

Back to Contents