Coating processes – Restoring or repairing – Metal article
Reexamination Certificate
2005-04-19
2005-04-19
Barr, Michael (Department: 1762)
Coating processes
Restoring or repairing
Metal article
C427S140000, C427S239000, C427S229000, C427S376600, C427S376800, C427S383100, C427S383700
Reexamination Certificate
active
06881439
ABSTRACT:
An aluminiding process that enables the cooling holes of an air-cooled component, such as a hot gas path component of a gas turbine engine, to be machined and then aluminized after all external surface coatings have been deposited. The aluminide coating is deposited using a slurry process capable of forming the aluminide coating on the component without damaging an existing ceramic coating on the component. The process involves applying an activator-free slurry containing aluminum particles that, when the component is sufficiently heated, melt and diffuse into the component surface to form the diffusion aluminide coating.
REFERENCES:
patent: 5254413 (1993-10-01), Maricocchi
patent: 5795659 (1998-08-01), Meelu et al.
patent: 6326051 (2001-12-01), Nakasogi et al.
patent: 6444054 (2002-09-01), Kircher et al.
patent: 20030152705 (2003-08-01), Pfaendtner et al.
Beck Cyril Gerard
Graham Stephen Daniel
King Warren Tan
Wood John Herbert
Barr Michael
General Electric Company
Genovese William
Hartman Domenica N. S.
Hartman Gary M.
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