Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Coating – specific composition or characteristic
Patent
1997-03-31
1999-11-02
Turner, Archene
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Coating, specific composition or characteristic
415200R, 416241B, 428141, 428156, 428472, 428701, 428702, 428615, 428623, 428632, 428650, 428552, 428669, 428680, 428652, 428668, 427348, 427402, 4274191, 4274192, B32B 1504
Patent
active
059758520
ABSTRACT:
A thermal barrier coating and a method for forming the coating on an article designed for use in a hostile thermal environment, such as turbine, combustor and augmentor components of a gas turbine engine. The method is particularly directed to increasing the spallation resistance of a thermal barrier coating system that includes a thermal insulating ceramic layer. The coating system of this invention generally includes a nickel aluminide alloy on which an aluminum oxide layer is formed, over which a ceramic layer is deposited so as to overlie and contact the aluminum oxide layer. The coating system does not include a bond coat, such as a diffusion aluminide or MCrAlY coating known in the prior art. The nickel aluminide alloy may be a binary NiAl alloy consisting essentially of nickel and aluminum in stoichiometric amounts, or may contain one or more oxygen-active elements. The NiAl alloy may be provided as a monolithic layer on a superalloy, or may be the base material for the article on which the thermal barrier coating is formed.
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Nagaraj Banalore A.
Rosenzweig Mark A.
Schaeffer Jon C.
General Electric Company
Hess Andrew C.
Narciso David L.
Turner Archene
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