Patent ID: 6576354
Filing Date: 2003-06-10
Classification: C23C,Y10T

Abstract:
A thermal spray coating layer of a rare earth compound or a rare earth-based composite formed on a substrate surface by a thermal spray coating method which comprises the step of:spraying particles of the rare earth compound or rare earth-based composite selected from the group consisting of rare earth oxide compounds and rare earth oxide-based composites at the substrate surface, said particles being carried by a flame, the particles having an average particle diameter in the range from 5 to 80 &mgr;m with a dispersion index in the range from 0.1 to 0.7 and a specific surface area in the range from 1 to 5 m2/g and the content of iron as an impurity in the particles not exceeding 5 ppm by weight calculated as iron oxide.