METHOD FOR FORMING CERAMIC LAYER ON METALLIC BASE MATERIAL SURFACE

摘要

PURPOSE:To form a desired ceramic layer having sufficient thickness on the surface of a base material in a relatively short time in a wide range of choice regardless of the size of the base material. CONSTITUTION:A binder powder 2a consisting of an Ni-base alloy and a coating powder 2b consisting essentially of TaC and having insufficient wettability with the molten alloy when oxidized are mixed to prepare a mixed powder 2. The mixed powder 2 is placed on the surface of a base material 1 consisting of SS 41. The mixed powder 2 is irradiated with an oscillating laser beam 5 to melt the binder powder 2a, the convection current generated in the melt 2a is allowed to act on the coating powder 2b, and the melt 2a is solidified with the coating powder aggregated on its surface.