Bondcoat including an oxygen getter
AssigneeGeneral Electric Company
InventorJulin Wan
Life of this patent
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Abstract
Coated components, along with their methods of formation, are provided. The coated component includes: a ceramic matrix composite substrate comprising silicon carbide and having a surface; a bondcoat on the surface of the ceramic matrix composite substrate; and an environmental barrier coating on the bondcoat. The bondcoat comprises a matrix phase having a plurality of oxygen getter particulates dispersed within the matrix phase and having a plurality of pores dispersed within the matrix phase such that a majority of the oxygen getter particulates are disposed within a respective pore of the plurality of pores.
Claims20
A coated component, comprising:
- a ceramic matrix composite substrate comprising silicon carbide and having a surface;
- a bondcoat on the surface of the ceramic matrix composite substrate, wherein the bondcoat comprises a matrix phase having a plurality of oxygen getter particulates dispersed within the matrix phase and having a plurality of pores dispersed within the matrix phase such that a majority of the oxygen getter particulates are disposed within a respective pore of the plurality of pores;
- and
- an environmental barrier coating on the bondcoat.
A method of forming a coated component, the method comprising:
- depositing a bondcoat mixture on a surface of a substrate, wherein the bondcoat mixture comprises a plurality of bimodal particles dispersed within a matrix material, wherein the bimodal particles comprise an oxygen getter and a sacrificial material;
- forming an environmental barrier coating on the bondcoat mixture;
- performing a first heat treatment on the bondcoat mixture at a first treatment temperature such that the sacrificial material is sufficiently burned out from the bondcoat mixture;
- and
- thereafter, performing a second heat treatment on the bondcoat mixture at a second treatment temperature such that the matrix material sinters to form a matrix phase with oxygen getter particulates dispersed within a plurality of pores in the matrix phase, wherein the second treatment temperature is greater than the first treatment temperature.
Dependencies are inferred from the claim text.