Platinum, rhodium, or palladium protective coatings in thermal b

Details Platinum, rhodium, or palladium protective coatings in thermal b Platinum, rhodium, or palladium protective coatings in thermal b

1994-03-28

1995-06-27

Lewis, Michael

Stock material or miscellaneous articles

All metal or with adjacent metals

Having composition, density, or hardness gradient

428670, 428678, 428629, 428633, 416241R, 416241B, B32B 1504, B63H 126

Patent

active

054278660

ABSTRACT:
A coated article comprises a base article having a substrate made of a material selected from the group consisting of a nickel-base alloy and a cobalt-base alloy, an intermediate metallic coating structure, and a thermal barrier coating. The intermediate metallic coating structure may be a protective layer of platinum, rhodium, or palladium on the base article, with no bond coat. The intermediate metallic coating may also be a bond coat, either oxidized or unoxidized, with a protective layer of platinum, rhodium, or palladium thereon. The protective layer typically partially interdiffuses with the underlying metallic structure.

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Birks et al, "Introduction to High Temperature Oxidation of Metals" 1983 (no month), p. 128.
"Field Evaluation of Gas Turbine Protective Coatings" --A. McMinn, Transactions of the ASME, p. 142/vol. 110, Jan. 1988.

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