Prestressed ceramic coatings

Details Prestressed ceramic coatings Prestressed ceramic coatings

C - Chemistry, Metallurgy

23

C

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C23C 28/00 (2006.01) C23C 4/02 (2006.01) C23C 4/10 (2006.01) C23C 4/12 (2006.01) F01D 11/12 (2006.01) F02C 7/30 (2006.01)

Patent

CA 1214080

Prestressed Ceramic Coatings Abstract Structure coated with graded ceramic material and methods of coating application are disclosed. Techniques for maintaining low stress to strength ratios across the depth of the coating are discussed. In one particular structure the coating is applied to a metal substrate (12) and comprises a metallic bond coat (14), a first interlayer (16) of metal/ceramic material, a second interlayer (18) of metal/ceramic material having an increased proportion of ceramic and an all ceramic layer. Modulation of the metal substrate temperature during the coating process establishes a desired residual stress pattern in the part.

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