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Method for thermal spray coating and rare earth oxide powder used therefor

  • US 20020018902A1
  • Filed: 06/29/2001
  • Published: 02/14/2002
  • Est. Priority Date: 06/29/2000
  • Status: Active Grant
First Claim
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1. 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 at the substrate surface as being carried by a flame, the particles having an average particle diameter in the range from 5 to 80 μ

    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.

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