Compositions for erosion and molten dust resistant environmental barrier coatings
AssigneeGeneral Electric Company
InventorGlen Harold Kirby
Life of this patent
Estimating the term…
Abstract
Coating systems are provided for positioning on a surface of a substrate, along with the resulting coated components and methods of their formation. The coating system may include a layer having a compound of the formula: A1−bBbZ1−dDdMO6 where: A is Al, Ga, In, Sc, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Fe, Cr, Co, Mn, Bi, or a mixture thereof; b is 0 to about 0.5; Z is Hf, Ti, or a mixture thereof; D is Zr, Ce, Ge, Si, or a mixture thereof; d is 0 to about 0.5; and M is Ta, Nb, or a mixture thereof.
Claims20
A coating system on a surface of a substrate, the coating system comprising:
- a layer of a compound having the formula:
- A1−bBbZ1−dDdMO6
- where:
- A is Al, Ga, In, Sc, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Fe, Cr, Co, Mn, Bi, or a mixture thereof;
- b is 0 to 0.5;
- Z is Hf, Ti, or a mixture thereof;
- D is Zr, Ce, Ge, Si, or a mixture thereof;
- d is 0 to 0.5;
- and
- M is Ta, Nb, or a mixture thereof;
- wherein the substrate is a ceramic matrix composite.
A coated component, comprising:
- a ceramic substrate having a surface;
- and
- a coating system on the surface of the ceramic substrate, wherein the coating system comprises a layer of a compound having the formula:
- A1−bBbZ1−dDdMO6
- where:
- A is Al, Ga, In, Sc, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Fe, Cr, Co, Mn, Bi, or a mixture thereof;
- b is 0 to 0.5;
- Z is Hf, Ti, or a mixture thereof;
- D is Zr, Ce, Ge, Si, or a mixture thereof;
- d is 0 to 0.5;
- and
- M is Ta, Nb, or a mixture thereof;
- wherein the ceramic substrate is a ceramic matrix composite.
Dependencies are inferred from the claim text.