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Method for improving the performance of oxidizable ceramic materials in oxidizing environmentsImproved adhesion of thermal barrier coatings to nonmetallic substrates using a dense layer of ceramic on an underlying nonmetallic substrate that includes at least one oxidizable component. The improved adhesion occurs because the application of the dense ceramic layer forms a diffusion barrier for oxygen. This diffusion barrier prevents the oxidizable component of the substrate from decomposing. The present invention applies ceramic by a process that deposits a relatively thick and dense ceramic layer on the underlying substrate. The formation of the dense layer of ceramic avoids the problem of void formation associated with ceramic formation by most prior art thermal decomposition processes. The formation of voids has been associated with premature spalling of thermal barrier layers and other protective layers applied to substrates.
Document ID
20080006986
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Nagaraj, Bangalore A.
Date Acquired
August 24, 2013
Publication Date
November 26, 2002
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-6,485,791
Patent Application
US-PATENT-APPL-SN-544041

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