Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Reexamination Certificate
2006-12-19
2006-12-19
Lavilla, Michael E. (Department: 1775)
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
C428S613000, C428S650000, C428S666000, C428S632000, C428S458000, C428S334000, C428S332000, C427S455000, C427S456000, C427S383100, C427S419100
Reexamination Certificate
active
07150921
ABSTRACT:
A bi-layer bond coating for use on metal alloy components exposed to hostile thermal and chemical environment, such as a gas turbine engine, and the method for applying such coatings. The preferred coatings include a bi-layer bond coat applied to the metal substrate using high velocity oxy-fuel (HVOF) thermal spraying. Bi-layer bond coatings in accordance with the invention consist of a dense first inner layer (such as iron, nickel or cobalt-based alloys) that provides oxidation protection to the metal substrate, and a second outer layer having controlled porosity that tends to promote roughness, mechanical compliance, and promotes adherence of the thermal barrier coating (TBC). Preferably, the outer, less dense layer of the bi-layer bond coat is formed from a mixture of metallic powder and polyester to adjust and control the porosity, but without sacrificing mechanical compliance.
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European Search Report, dated Mar. 30, 2006.
Bucci David Vincent
Debarro Joseph
Mortensen Tyrone Robert
Nelson Warren Arthur
Schaeffer Jon Conrad
General Electric Company
Lavilla Michael E.
Nixon & Vanderhye
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