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Articles for high temperature service and methods for their manufacture

United States Patent

June 14, 2016
View the Complete Patent at the US Patent & Trademark Office
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.
Sarrafi-Nour; Reza (Clifton Park, NY), Meschter; Peter Joel (Niskayuna, NY), Johnson; Curtis Alan (Niskayuna, NY), Luthra; Krishan Lal (Niskayuna, NY), Rosenzweig; Larry Steven (Clifton Park, NY)
General Electric Company (Niskayuna, NY)
11/ 941,415
November 16, 2007
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT This invention was made with U.S. Government support under contract number DE-FC26-05NT42643 awarded by the Department of Energy. The Government has certain rights in the invention.