Silicon compositions containing boron and methods of forming the same

Patent metadata

Field	Value
Publication number	US-2018079649-A1
Application number	US-201615267563-A
Country	US
Kind code	A1
Filing date	Sep 16, 2016
Priority date	Sep 16, 2016
Publication date	Mar 22, 2018
Grant date	—

Abstract

A compound is provided that has 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. 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 composition 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 composition 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 composition 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 composition 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 composition as in claim 1 , wherein x is about 0.01 to about 0.5.

7 . The composition 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 composition 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 composition 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 composition 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 composition 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 composition 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 Y, La, Yb, or a mixture thereof.

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 Al.

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

• C04B41/5096

  Silicon (C04B35/573 takes precedence) · CPC title

• C04B2235/3891

  Silicides, e.g. molybdenum disilicide, iron silicide · CPC title

• C04B2235/3409

  Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax · CPC title

• C04B2235/428

  Silicon · CPC title

• C04B35/50

  based on rare-earth compounds {(non-oxide rare earth compounds C04B35/5156)} · CPC title