Abstract: A SiC coat having an outer surface including a back face, a front face opposite to the back face, a first side face extending in a direction from the back face toward the front face, and a first R-surface between the back face and the first side face, the SiC coat including: an overcoat configured to include a first upper layer side-face portion that forms the first side face and the first R-surface of the outer surface; and an undercoat configured to include a backface portion that forms the back face of the outer surface and a first lower layer side-face portion covered by the first upper layer side-face portion of the overcoat, wherein the first upper layer side-face portion and the backface portion form a first interface, and the first interface appears on the first R-surface of the outer surface.

Abstract: A SiC coat having an outer surface including a back face, a front face opposite to the back face, a first side face extending in a direction from the back face toward the front face, and a first R-surface between the back face and the first side face, the SiC coat including: an overcoat configured to include a first upper layer side-face portion that forms the first side face and the first R-surface of the outer surface; and an undercoat configured to include a backface portion that forms the back face of the outer surface and a first lower layer side-face portion covered by the first upper layer side-face portion of the overcoat, wherein the first upper layer side-face portion and the backface portion form a first interface, and the first interface appears on the first R-surface of the outer surface.

Abstract: A SiC member includes: a substrate having a reference hole in a front-back direction; and first and second SiC coats. The first SiC coat has a first hole connected to the reference hole in the front-back direction, a first region extending around the first hole to form its inner circumferential surface, and a second region extending around the first region adjacently to the first region, the second SiC coat has a second hole connected to the first hole in the front-back direction, a third region extending around the second hole to form its inner circumferential surface, and a fourth region extending around the third region adjacently to the third region, the first region has a crystal structure containing crystals grown in a first direction obliquely crossing the front-back direction, and the second, third and fourth regions have crystal structures containing crystals grown in a second direction along the front-back direction.