Silicon compositions containing boron and methods of forming the same

Patent metadata

Field	Value
Publication number	US-10294112-B2
Application number	US-201615267563-A
Country	US
Kind code	B2
Filing date	Sep 16, 2016
Priority date	Sep 16, 2016
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A compound is provided that has the formula: Ln4-x-zBxDzM2-n-yAnByO9, where Ln comprises La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof; x is 0 to about 2; D is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, where: D is not equal to Ln; if D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, then z is 0 to less than 4; if D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, then z is 0 to about 2; M comprises Ga, Al, or a combination thereof; A comprises Fe, In, or a combination thereof; n is 0 to about 1; y is 0 to about 1; and x+y is greater than 0. In one embodiment, a composition is generally provided that includes a silicon-containing material and such a boron-doped refractory compound.

First claim

What is claimed is:

1. A compound having the formula:
Ln 4-x-z B x D z M 2-n-y A n B y O 9
where
Ln comprises La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof;
x is 0 to about 2;
D is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, where:
D is not equal to Ln;
if D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, then z is 0 to less than 4;
if D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, then z is 0 to about 2;

M comprises Ga, Al, or a combination thereof;
A comprises Fe, In, or a combination thereof;
n is 0 to about 1;
y is 0 to about 1; and
x+y is greater than 0.

2. The Compound as in claim 1 , wherein D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, and wherein z is greater than 0 to about 4.

3. The Compound as in claim 1 , wherein D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, and wherein z is greater than 0 to about 2.

4. The Compound as in claim 1 , wherein D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, and wherein z is greater than 0 to about 2.

5. The Compound as in claim 1 , wherein D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, and wherein z is greater than 0 to about 1.

6. The Compound as in claim 1 , wherein x is about 0.01 to about 0.5.

7. The Compound as in claim 1 , wherein x is 0 such that the compound has the formula:
Ln 4-z D z M 2-n-y A n B y O 9
where
Ln comprises La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof;
D is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, where:
D is not equal to Ln;
if D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, then z is 0 to less than 4;
if D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, then z is 0 to about 2;
M comprises Ga, Al, or a combination thereof;
A comprises Fe, In, or a combination thereof;
n is 0 to about 1; and
y is greater than 0 to about 1.

8. The Compound as in claim 7 , wherein D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, and wherein z is greater than 0 to about 4.

9. The Compound as in claim 7 , wherein D is La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof, and wherein z is greater than 0 to about 2.

10. The Compound as in claim 7 , wherein D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, and wherein z is greater than 0 to about 2.

11. The Compound as in claim 7 , wherein D is Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof, and wherein z is greater than 0 to about 1.

12. The Compound as in claim 7 , wherein x and z are 0 such that the compound has the formula:
Ln 4 M 2-n-y A n B y O 9
where
Ln comprises La, Ce, Pr, Nd, Pm, Sm, or a mixture thereof;
M comprises Ga, Al, or a combination thereof;
A comprises Fe, In, or a combination thereof;
n is 0 to about 1; and
y is greater than 0 to about 1.

13. The compound as in claim 1 , wherein Ln comprises La.

14. The compound as in claim 1 , wherein n is 0.

15. The compound as in claim 1 , wherein n is greater than 0 to about 1, and wherein A comprises In.

16. The compound as in claim 1 , wherein n is greater than 0 to about 1, and wherein A comprises Fe.

17. A composition, comprising: silicon metal and the compound of claim 1 .

18. A coated component, comprising:
a ceramic component comprising a plurality of CMC plies and defining a surface; and
a bond coating directly on the surface of the ceramic component, wherein the bond coating comprises the composition of claim 17 .

19. A composition, comprising: a silicide and the compound of claim 1 .

20. The composition as in claim 19 , wherein the silicide comprises a rare earth silicide, a molybdenum silicide, a rhenium silicide, or mixtures thereof.

Assignees

• Gen Electric

Inventors

• Kirby Glen Harold
• Wan Julin

Classifications

• Y02T50/672

  Cross-Sectional Technologies · mapped topic

• C04B41/5071

  Silicides · CPC title

• C04B35/18

  rich in aluminium oxide · CPC title

• F05D2300/123

  Boron · CPC title

• F01D5/288

  Protective coatings for blades · CPC title