Environmental barrier coating

Patent metadata

Field	Value
Publication number	US-2017190920-A1
Application number	US-201715469034-A
Country	US
Kind code	A1
Filing date	Mar 24, 2017
Priority date	Mar 2, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

A coating used in a vapor-oxidative atmosphere has a first layer including SIALON and a second layer covering the first layer and being exposed to the atmosphere, the second layer including mullite, wherein the first layer and the second layer get in contact with each other.

First claim

What is claimed is:

1 . A coating used in a vapor-oxidative atmosphere and covering a ceramic matrix composite material, comprising:
a first layer including SiAlON; and a second layer covering the first layer and being exposed to the atmosphere, the second layer including mullite, wherein the first layer and the second layer get in contact with each other.

2 . The coating of claim 1 , wherein the SIALON is a beta-prime form.

3 . The coating of claim 1 , wherein the second layer is 5-300 micrometers in thickness.

4 . The coating of claim 1 , wherein the first layer is 5-300 micrometers in thickness and is bonded with and covers a base body.

Assignees

• Ihi Corp
• Japan Fine Ceramics Ct

Inventors

• Nakamura Takeshi
• Tamura Takashi
• Kitaoka Satoshi
• Kawashima Naoki

Classifications

• F05D2300/2261

  of silicon · CPC title

• C04B2237/40

  Metallic · CPC title

• C04B41/89 Primary

  for obtaining at least two superposed coatings having different compositions · CPC title

• C04B2237/341

  Silica or silicates · CPC title

• C04B2237/368

  Silicon nitride · CPC title