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US 10,513,942 B2Granted
Fusible bond for gas turbine engine coating system
AssigneeUnited Technologies Corporation
InventorsChristopher W. Strock, Enzo DiBenedetto
Life of this patent
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Abstract
A seal comprises a housing. A coating has at least two layers with a bond layer to be positioned between a housing and a second hard layer. The second hard layer is formed to be harder than the bond layer. The bond layer has a bond strength greater than or equal to 200 psi and less than or equal to 2000 psi. A gas turbine engine, and a method of forming a coating layer are also disclosed.
Claims17
A seal comprising:
- a housing;
- a coating having at least two layers with a bond layer to be positioned between a housing and a second erosion resistant layer, said second erosion resistant layer having a hardness greater than a hardness of said bond layer, and said bond layer having a bond strength greater than or equal to 200 psi and less than or equal to 2000 psi;
- wherein said bond strength is a cohesive bond strength;
- wherein said erosion resistant layer is formed of a ceramic;
- and
- wherein said bond layer is formed of a ceramic.
3 more elements
A gas turbine engine comprising:
- a rotating blade having a radially outer tip;
- a housing positioned radially outwardly of said blade, a coating provided on said housing outwardly of said blade, said coating having at least two layers with a bond layer positioned between said housing and a second erosion resistant layer, said second erosion resistant layer having a hardness greater than a hardness of said bond layer, and said bond layer having a bond strength greater than or equal to 200 psi and less than or equal to 2000 psi;
- wherein said bond strength is a cohesive bond strength;
- wherein said erosion resistant layer is formed of a ceramic;
- and
- wherein said bond layer is formed of a ceramic.
3 more elements
A method of forming a coating layer in a gas turbine engine comprising the steps of:
- depositing a first bond layer onto a housing, and depositing a second erosion resistant layer on said bond layer with there being a bond strength between said bond layer and said erosion resistant layer, and said bond strength being greater than or equal to 200 psi and less than or equal to 2000 psi;
- and
- wherein plasma spray deposit is utilized and said bond layer is deposited with a lower velocity and at a lower temperature than is utilized to deposit said erosion resistant layer.
Dependencies are inferred from the claim text.