Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1996-01-02
1997-11-04
Turner, Archene
Stock material or miscellaneous articles
Composite
Of inorganic material
428697, 428701, 428702, 428472, 4272481, 427249, 501103, 501152, B32B 1504
Patent
active
056838255
ABSTRACT:
A thermal barrier coating adapted to be formed on an article subjected to a hostile thermal environment while subjected to erosion by particles and debris, as is the case with turbine, combustor and augmentor components of a gas turbine engine. The thermal barrier coating is composed of a metallic bond layer deposited on the surface of the article, a ceramic layer overlaying the bond layer, and an erosion-resistant composition dispersed within or overlaying the ceramic layer. The bond layer serves to tenaciously adhere the thermal insulating ceramic layer to the article, while the erosion-resistant composition renders the ceramic layer more resistant to erosion. The erosion-resistant composition is either alumina (Al.sub.2 O.sub.3) or silicon carbide (SiC), while a preferred ceramic layer is yttria-stabilized zirconia (YSZ) deposited by a physical vapor deposition technique to have a columnar grain structure.
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Bruce Robert W.
Maricocchi Antonio F.
Nagaraj Bangalore A.
Rigney David V.
Rosenzweig Mark A.
General Electric Company
Hess Andrew C.
Narciso David L.
Turner Archene
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