ENHANCED SURFACE PREPARATION PROCESS FOR APPLICATION OF CERAMIC COATING

摘要

PROBLEM TO BE SOLVED: To provide a method for improving the adherence of a ceramic coating to a surface, and prolonging the service life of the coating under sever conditions at elevated temperatures. SOLUTION: A metallic surface is formed so as to be subjected to the ceramic coating. A part of the metallic surface is removed by grinding treatment of gradually reducing its strength. The surface of a metal or an intermetallic compound, particularly, a bond coated surface is formed so as to be subjected to the ceramic coating by using a method including mechanical grinding at least in two steps containing a fist step and a second step which is less aggressive than the first step. Alternatively, a single step in which the aggressiveness of the grinding in the start of the step is higher than that of the final grinding can be used. The grinding suing ceramic particles is a suitable method. The ceramic coating formed on the surface in this way exhibits an improved service life at elevated temperatures.