Bond coat with low deposited aluminum level and method...

Details Bond coat with low deposited aluminum level and method... Bond coat with low deposited aluminum level and method...

2005-12-05

2008-08-19

La Villa, Michael (Department: 1794)

Coating processes

With post-treatment of coating or coating material

Heating or drying

C427S532000, C427S455000, C427S456000, C427S405000, C416S24100B

Reexamination Certificate

active

07413778

ABSTRACT:
A method for applying a NiAl based bond coat and a diffusion aluminide coating to a metal substrate comprises, in part, coating a portion of the external surface of the superalloy substrate, by physical vapor deposition with a layer of a NiAl based metal alloy, wherein the deposited NiAl based metal alloy includes a controlled amount of about 6 to 25 weight percent aluminum, wherein the deposited aluminum level of the NiAl based metal alloy is controlled to be about 50-100% of its final level after aluminizing to form a coated external portion; and subsequently, simultaneously aluminizing the coated external portion and a different surface of the superalloy substrate.

REFERENCES:
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patent: 5236745 (1993-08-01), Gupta et al.
patent: 6283714 (2001-09-01), Rigney et al.
patent: 6291084 (2001-09-01), Darolia et al.
patent: 6896488 (2005-05-01), Bruce et al.
patent: 2004/0180232 (2004-09-01), Das er al.

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