Abstract: A ceramic member is produced by performing a laser treatment on a ceramic substrate as a pretreatment for a surface treatment such that grooves that can be substantially uniformly filled with a surface treatment material are formed in the surface of the ceramic substrate. Through laser irradiation of the surface grooves with recessed surfaces formed to extend in at least one direction are provided. Flat surfaces are formed at areas between the grooves that are adjacent to each other. Pitches between the adjacent grooves are set to a range of 0.05 mm to 0.30 mm. One of the grooves has a width that progressively decreases as the depth increases and is opened on one side in the depth direction at a maximum width. The one of the grooves has an aspect ratio in a range of 0.5 to 1.3 and an opening ratio of equal to or greater than 70%.

Abstract: There is provided a thermal spray powder for forming an abradable thermal spray coating. The thermal spray powder includes NiCr alloy particles and synthetic mica particles. The synthetic mica particles are contained at 40 volume % or less with respect to a total volume of the thermal spray powder.

Abstract: There is provided a thermal spray powder for forming an abradable thermal spray coating. The thermal spray powder includes NiCr alloy particles and synthetic mica particles. The synthetic mica particles are contained at 40 volume % or less with respect to a total volume of the thermal spray powder.