Rare-earth oxide thermal spray coated articles and powders for thermal spraying

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A rare-earth oxide thermal spray coated article comprising a substrate and a coating layer formed by thermally spraying a rare-earth oxide thermal spraying powder onto a surface of the substrate, said coating layer being of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a value of −3.0 to +3.0, and a b* value of −3.0 to +3.0.