Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Reexamination Certificate
2005-12-13
2005-12-13
Koehler, Robert R. (Department: 1775)
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
C428S652000, C428S670000, C428S680000, C428S686000
Reexamination Certificate
active
06974637
ABSTRACT:
An article and TBC coating system thereon that in combination exhibit significantly improved spallation resistance. The article comprises a substrate formed of a metal alloy containing ruthenium and one or more refractory elements (e.g., tantalum, tungsten, molybdenum, rhenium, hafnium, etc.). The substrate is protected by a coating system comprising an aluminum-containing bond coat on the surface of the substrate and a ceramic coating bonded to the substrate by the bond coat. The bond coat, preferably an aluminide, is deposited so as to be substantially free of ruthenium, though ruthenium is present in the bond coat as a result of diffusion from the substrate into the bond coat.
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“The effect of grit blasting on the oxidation behavior of a platinum-modified nickel-aluminide coating”; Metallurgical and Materials Transactions a (Physical Metallurgy and Materials Science) Minerals, Metals & Mater. Soc. & ASM Int USA, vol. 32A, No. 6, Jun. 1, 2001, pp. 1467-1478, XP008036870; ISSN: 1073-5623.
Darolia Ramgopal
Pfaendtner Jeffrey Allan
Rigney Joseph David
Schorr Deborah A.
Spitsberg Irene
General Electric Company
Hartman Domenica N. S.
Hartman Gary M.
Koehler Robert R.
Narciso David L.
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