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Process of producing a ceramic matrix composite article and article formed thereby

United States Patent

October 25, 2011
View the Complete Patent at the US Patent & Trademark Office
A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix material. A fraction of the reinforcement material is present and possibly exposed at a surface of the body. The body surface is then provided with a surface layer formed of a slurry containing a particulate material but lacking the reinforcement material of the body. The body and surface layer are heated to form the article by converting the precursor within the body to form the ceramic matrix material in which the reinforcement material is contained, and by converting the surface layer to form the protective layer that covers any fraction of the reinforcement material exposed at the body surface.
Corman; Gregory Scot (Ballston Lake, NY), McGuigan; Henry Charles (Duanesburg, NY), Brun; Milivoj Konstantin (Ballston Lake, NY)
General Electric Company (Niskayuna, NY)
12/ 420,686
April 8, 2009
This invention was made with Government support under Agreement No. DE-FC02-92CE41000 awarded by the Department of Energy. The Government has certain rights in the invention.