Gamma prime phase-containing nickel aluminide coating

Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...

Reexamination Certificate

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C428S610000, C428S650000, C428S670000, C416S24100B

Reexamination Certificate

active

11162838

ABSTRACT:
An intermetallic composition suitable for use as an environmentally-protective coating on surfaces of components used in hostile thermal environments, including the turbine, combustor and augmentor sections of a gas turbine engine. The coating contains the gamma-prime (Ni3Al) nickel aluminide intermetallic phase and either the beta (NiAl) nickel aluminide intermetallic phase or the gamma solid solution phase. The coating has an average aluminum content of 14 to 30 atomic percent and an average platinum-group metal content of at least 1 to less than 10 atomic percent, the balance of the coating being nickel, incidental impurities, and optionally hafnium.

REFERENCES:
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patent: 5856027 (1999-01-01), Murphy
patent: 5981091 (1999-11-01), Rickerby et al.
patent: 6682827 (2004-01-01), Darolia et al.
patent: 2004/0229075 (2004-11-01), Gleeson et al.
patent: 1 321 541 (2003-06-01), None
U.S. Appl. No. 10/904,844, filed Dec. 1, 2004, Darolia et al.
U.S. Appl. No. 10/904,220, filed Oct. 29, 2004, Darolia et al.
U.S. Appl. No. 10/904,221, filed Oct. 29, 2004, Darolia et al.
U.S. Appl. No. 10/904,222, filed Oct. 29, 2004, Darolia et al.

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