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US 8,777,562 B2Granted
Blade air seal with integral barrier
AssigneeUnited Techologies Corporation
InventorsChristopher W. Strock, Melvin Freling
Life of this patent
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Abstract
An air seal for use with rotating parts includes a thermal barrier coating layer adhered to a substrate. An abradable layer is adhered to the thermal barrier coating layer. The abradable layer comprises a matrix of agglomerated hexagonal boron nitride and a metallic alloy. Another hexagonal boron nitride is interspersed with the matrix.
Claims14
An air seal for use with rotating structure in a gas turbine engine comprising:
- a substrate;
- a thermal barrier coating layer adhered to the substrate;
- and
- an abradable layer adhered to the thermal barrier coating layer, the abradable layer comprising:
- a matrix of agglomerated hexagonal boron nitride and a metallic alloy, and
- an hexagonal boron nitride, wherein the hexagonal boron nitride is interspersed with the matrix.
3 more elements
A gas turbine engine comprising:
- a first structure;
- a second structure rotating relative to the first structure, wherein one of the first and second structures provides a substrate;
- a thermal barrier coating layer adhered to the substrate;
- and
- an abradable layer adhered to the thermal barrier coating layer, the abradable layer comprising:
- a matrix of agglomerated hexagonal boron nitride and a metallic alloy, and
- an hexagonal boron nitride, wherein the hexagonal boron nitride is interspersed with the matrix.
4 more elements
A method of manufacturing a gas turbine engine air seal comprising:
- depositing a thermal barrier coating onto a substrate;
- and
- depositing an abradable coating onto the thermal barrier coating, including
- agglomerating a matrix of hexagonal boron nitride powder and a fine metallic alloy powder, and
- mixing with the matrix a hexagonal boron nitride powder.
2 more elements
Dependencies are inferred from the claim text.