Silicon oxycarbide environmental barrier coating

Patent metadata

Field	Value
Publication number	US-11802093-B2
Application number	US-201916550839-A
Country	US
Kind code	B2
Filing date	Aug 26, 2019
Priority date	Jan 14, 2014
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

An article includes a ceramic-based substrate and a barrier layer on the ceramic-based substrate. The barrier layer includes a matrix of barium-magnesium alumino-silicate or SiO 2 , a dispersion of silicon oxycarbide particles in the matrix, and a dispersion of particles, of the other of barium-magnesium alumino-silicate or SiO 2 , in the matrix.

First claim

The invention claimed is:

1. A composite material comprising:
a matrix of barium-magnesium alumino-silicate or SiO 2 ;
a dispersion of silicon oxycarbide particles in the matrix, the silicon oxycarbide particles having Si, O, and C in a covalently bonded network; and
a dispersion of particles, of the other of barium-magnesium alumino-silicate or SiO 2 , in the matrix, wherein the composite material forms a layer having a first side and a second side, and wherein barium-magnesium alumino-silicate particles are concentrated near the first side, thereby forming a sealing layer.

2. The composite material as recited in claim 1 , including, by volume, 1-30% of the barium-magnesium alumino-silicate particles, 5-40% of the matrix of SiO 2 , and a balance of the silicon oxycarbide particles.

3. The composite material as recited in claim 2 , including, by volume, 1-5% of the barium-magnesium alumino-silicate particles.

4. The composite material as recited in claim 1 , wherein the matrix of SiO 2 is continuous.

5. The composite material as recited in claim 1 , including, by volume, 30-94% of the silicon oxycarbide particles, 5-40% of the matrix of SiO 2 , and 1-5% of the barium-magnesium alumino-silicate particles.

6. The material of claim 1 , wherein the silicon oxycarbide particles have a composition SiO x M z C y , where M is at least one metal, x<2, y>0, z<1, and x and z are non-zero.

7. The material of claim 1 , wherein the second side of the layer is adjacent a substrate.

8. The material of claim 1 , wherein a cationic metal species from the barium-magnesium alumino-silicate particles is diffused into the silicon oxycarbide particles.

9. The material of claim 1 , wherein an average maximum dimension of the silicon oxycarbide particles is between 1 and 75 micrometers.

10. The material of claim 9 , wherein an average maximum dimension of the silicon oxycarbide particles is between 44 and 75 micrometers.

11. A composite material comprising:
a matrix of barium-magnesium alumino-silicate or SiO 2 ;
a dispersion of silicon oxycarbide particles in the matrix, the silicon oxycarbide particles having Si, O, and C in a covalently bonded network; and
a dispersion of particles, of the other of barium-magnesium alumino-silicate or SiO 2 , in the matrix, wherein the composite material includes, by volume, 30-94% of the silicon oxycarbide particles, 5-40% of the matrix of SiO 2 , and 1-5% of the barium-magnesium alumino-silicate particles.

Assignees

• Raytheon Tech Corp
• Rtx Corp

Inventors

• Tang Xia
• Sheedy Paul
• Kashyap Tania Bhatia
• Schmidt Wayde R
• Goberman Daniel G

Classifications

• C04B41/87 Primary

  Ceramics · CPC title

• B32B9/005 Primary

  comprising one layer of ceramic material, e.g. porcelain, ceramic tile (layered products with at least two ceramic layers composed mainly of ceramic B32B18/00) · CPC title

• C04B35/14

  based on silica · CPC title

• C04B35/195

  Alkaline earth aluminosilicates, e.g. cordierite {or anorthite} · CPC title

• C04B35/5603

  with a well-defined oxygen content, e.g. oxycarbides · CPC title