Reactive fiber interface coatings for improved environmental stability

Patent metadata

Field	Value
Publication number	US-2016159694-A1
Application number	US-201314134393-A
Country	US
Kind code	A1
Filing date	Dec 19, 2013
Priority date	Mar 13, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

A multilayer interface coating for composite material fibers includes a first coating layer deposited onto a fiber and a second coating layer deposited onto the first coating layer.

First claim

What is claimed is:

1 . A composite material comprising
a matrix, and a plurality of coated fibers suspended in the matrix, the coated fibers each including a fiber and a multilayer interface coating deposited on the fiber, wherein the multilayer interface coating includes an oxide layer, a silicon containing compound layer, and a silicate formed at the interface of the oxide layer and the silicon containing layer.

2 . The composite material of claim 1 , wherein the silicate is formed as the result of an oxidation reaction between the oxide layer and the silicon containing compound layer when the temperature of the multilayer interface coating is raised above 1000 degrees Celsius.

3 . The composite material of claim 1 , wherein the fibers of the coated fibers include silicon carbide.

4 . The composite material of claim 3 , wherein the silicon containing compound layer includes silicon carbide.

5 . The composite material of claim 3 , wherein the matrix is a ceramic matrix including silicon carbide.

6 . The composite material of claim 3 , wherein the oxide layer is a rare earth oxide.

7 . The composite material of claim 6 , wherein the oxide layer includes at least one of Yttrium(III) oxide, Ytterbium oxide, Erbium(III) oxide, Lutetium(III) oxide, and Dysprosium(III) oxide.

8 . The composite material of claim 3 , wherein the oxide layer is a transition metal.

9 . The composite material of claim 8 , wherein the oxide layer includes at least one of Zirconium dioxide and Hafnium(IV) oxide.

10 . The composite material of claim 1 , wherein each of the oxide layer and the silicon containing layer has a thickness of between about 25 nanometers to about 100 nanometers.

11 . The composite material of claim 1 , wherein at least one of the oxide layer and the silicon containing layer is porous.

12 . A coated fiber for use in a composite material, the coated fiber comprising
a fiber and a multilayer interface coating deposited on the fiber, wherein the multilayer interface coating includes an oxide layer, a silicon containing compound layer, and a silicate formed by the oxide layer and the silicon containing layer.

13 . The composite material of claim 12 , wherein the silicate is formed as the result of an oxidation reaction between the oxide layer and the silicon containing compound layer when the temperature of the multilayer interface coating is raised above 1000 degrees Celsius.

14 . The composite material of claim 12 , wherein the silicon containing compound layer includes silicon carbide.

15 . The composite material of claim 14 , wherein the fibers of the coated fibers include silicon carbide tows.

16 . The composite material of claim 15 , wherein the oxide layer forms a first layer and the silicon containing layer forms a second layer and the second layer is arranged further from the fiber than the first layer.

17 . The composite material of claim 16 , wherein the second layer is porous.

18 . The composite material of claim 14 , wherein the silicon containing layer is porous.

19 . A coated fiber for use in a composite material, the coated fiber comprising
a silicon carbide fiber and a multilayer interface coating that comprises a first layer including an oxide and a second layer including silicon carbide, wherein the second layer is arranged further from the fiber than the first layer and the second layer is porous.

20 . The coated fiber of claim 19 , wherein the multilayer interface coating includes a silicate formed by the oxide layer and the silicon containing layer.

Assignees

• Rolls Royce Corp

Inventors

• Chamberlain Adam L
• Landwehr Sean E

Classifications

• C04B35/62868

  Boron nitride · CPC title

• C04B35/80 Primary

  Fibres, filaments, whiskers, platelets, or the like · CPC title

• C04B35/62847

  with oxide ceramics · CPC title

• C04B2235/5244

  Silicon carbide · CPC title

• C04B35/62897

  Coatings characterised by their thickness · CPC title