Nickel-base superalloy article substrate having aluminide...

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, C428S679000, C428S332000, C428S336000, C416S24100B, C427S250000, C427S252000, C427S318000, C427S319000, C427S320000, C427S419100

Reexamination Certificate

active

06844086

ABSTRACT:
A coated superalloy article is prepared by furnishing a nickel-base superalloy article substrate having a rhenium content of not less than about 4.0 percent by weight, and thereafter depositing an aluminum-containing coating onto a surface of the article substrate. The aluminum-containing coating includes an additive zone having an average aluminum content of not greater than about 27 percent by weight, and a diffusion zone of interdiffusion with the article substrate. A ratio of a thickness of the additive zone to a thickness of the diffusion zone is not greater than about 3:1, and is preferably about 1:1.

REFERENCES:
patent: 5334263 (1994-08-01), Schaeffer
patent: 5598968 (1997-02-01), Schaeffer et al.
patent: 5935353 (1999-08-01), Murphy et al.
patent: 6045863 (2000-04-01), Olson et al.
patent: 6066405 (2000-05-01), Schaeffer
patent: 6332926 (2001-12-01), Pfaendtner et al.

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