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US 2010/0247323 A1Published application
Erosion barrier for thermal barrier coatings
AssigneeUnited Technologies Corporation
InventorsJoshua Persky, David A. Litton, David L. Lambert
Life of this patent
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Abstract
A workpiece, such as a turbine engine component, comprises a substrate, a thermal barrier coating on the substrate, and a hard erosion barrier deposited over the thermal barrier coating. The erosion barrier preferably has a Vickers hardness in the range of from 1300 to 2750 kg/mm2. The erosion barrier may be formed from aluminum oxide, silicon carbide, silicon nitride, or molybdenum disilicide. The erosion barrier may be formed using either an electrophoretic deposition process or a slurry process.
Claims21
1-25. (canceled)
A workpiece comprising:
- a substrate formed from a nickel base superalloy;
- a thermal barrier coating deposited on and in direct contact with said substrate;
- said thermal barrier coating being formed from a zirconia based material;
- and
- a hard erosion barrier deposited over said thermal barrier coating, said hard erosion barrier having a Vickers hardness in the range of from 1300 to 2750 kg/mm2 and being formed from a different material than said zirconia based material.
2 more elements
(canceled)
Dependencies are inferred from the claim text.