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Title: Articles for high temperature service and methods for their manufacture

Patent ·
OSTI ID:1257248
; ; ; ;

An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer comprising an alkaline-earth aluminosilicate disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing alkaline-earth aluminosilicate layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.

Research Organization:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42643
Assignee:
General Electric Company (Niskayuna, NY)
Patent Number(s):
9,365,725
Application Number:
11/941,415
OSTI ID:
1257248
Resource Relation:
Patent File Date: 2007 Nov 16
Country of Publication:
United States
Language:
English

References (6)

Coating for carbon-carbon composites and method for producing same patent March 1999
Thermal/environmental barrier coating system for silicon-based materials patent November 1999
Silicon based substrate with yttrium silicate environmental/thermal barrier layer patent October 2001
Silicon based substrate with environmental/ thermal barrier layer patent June 2002
Multilayer article characterized by low coefficient of thermal expansion outer layer patent July 2004
Protective coatings patent-application May 2006

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