Ebc layer containing boron
AssigneeROLLS-ROYCE plc
InventorsRobert Alexander Sean Golden, Adam Lee Chamberlain, Gregory John Kenneth Harrington
Life of this patent
Estimating the term…
Abstract
The disclosure describes articles having coating systems configured to inhibit or prevent crystallization of TGO at the operating temperature of the article. An article includes a substrate defining a surface; a bond coat on the surface of the substrate; a coating layer that includes a boron dopant configured to inhibit crystallization of amorphous silicon dioxide thermally grown oxide on the bond coat at an operating temperature of the article. By inhibiting or preventing TGO crystallization, the described coating systems may increase a useable life of the component.
Claims20
An article comprising:
- a substrate defining a surface;
- a bond coat on the surface of the substrate;
- and
- a coating layer on the bond coat, wherein the coating layer comprises a boron dopant configured to inhibit crystallization of amorphous silicon dioxide thermally grown oxide on the bond coat at an operating temperature of the article.
A gas turbine engine component comprising:
- a ceramic matrix composite (CMC) substrate defining the gas turbine engine component, wherein the CMC substrate comprises a silicon-containing material;
- and
- a coating layer on a surface of the CMC, wherein the coating layer comprises a boron dopant, wherein the boron dopant is configured to inhibit crystallization of amorphous silicon dioxide thermally grown oxide on the surface of the CMC substrate at an operating temperature of the gas turbine engine component.
A method comprising:
- depositing a bond coat on a surface of a substrate defining an article;
- depositing a coating layer on the bond coat, wherein the coating layer comprises a boron dopant, wherein the boron dopant is configured to inhibit crystallization of amorphous silicon dioxide thermally grown oxide on the bond coat at an operating temperature of the article.
Dependencies are inferred from the claim text.