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US 4,880,614 AGranted
Ceramic thermal barrier coating with alumina interlayer
AssigneeAllied-Signal Inc.
InventorsThomas E. Strangman, Patricia A. Solfest
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Abstract
A ceramic thermal barrier coating system for superalloy components subjected to high operating temperatures, such as gas turbine engine airfoils, is disclosed which includes a high purity alumina interfacial layer between the metallic substrate and the ceramic overcoat in order to better resist failure by spalling.
Claims9
An article of manufacture suitable for use in a gas turbine engine comprising:
- a superalloy substrate,
- a metallic bond coating on the substrate,
- an insulative ceramic coating on the metallic bond coating, and
- an interlayer between the bond coating and the ceramic coating which consists essentially of high purity alpha alumina.
1 more element
Dependencies are inferred from the claim text.