Patent ID: 7767268

Claim:
A method of producing a spray coated member having a resistance to plasma erosion, characterized in that a spraying powder material made from a ceramic having a particle size of 5-80 μm is directly sprayed onto a surface of a substrate to form a ceramic spray coating, and then an electron beam is irradiated onto a surface of the spray coating to fuse and solidify an outermost surface layer portion of the coating to form an electron beam irradiated layer, wherein before radiation with the electron beam the ceramic spray coating has a surface form that a skewness value (Rsk) of a roughness curve in the height direction according to JIS B0601 is greater than 0, wherein the ceramic spray coating is an oxide ceramic spray coating made of Al 2 O 3 , Y 2 O 3 or Al 2 O 3 —Y 2 O 3 composite oxide.