Method for preparing a cermet-coated article

Details Method for preparing a cermet-coated article Method for preparing a cermet-coated article

1993-05-06

1996-01-23

Utech, Benjamin

Coating processes

With post-treatment of coating or coating material

Heating or drying

427427, B05D 302

Patent

active

054863821

ABSTRACT:
An article (22) is coated with a cermet coating (20) by first roughening and oxidizing the surface to be coated. A mixture is formed of a metallic powder having a mean particle size of less than about 5 micrometers, and a ceramic powder having at least some of the particle of a size less than the mean particle size of the metallic powder. The mixture of the metallic powder and the ceramic powder desirably has a coating coefficient of thermal expansion of about that of the article coefficient of thermal expansion after firing. The mixture of metallic and ceramic powders is slurried and applied to the prepared surface (24) of the article (22), preferably by spraying. The coated article is heated to an intermediate temperature to vaporize the carrier liquid, and thereafter to high temperature to sinter the coating.

REFERENCES:
patent: 3784407 (1971-03-01), Shiio et al.
patent: 4567059 (1986-01-01), Yamaoka et al.
patent: 4818626 (1989-04-01), Werdecker et al.
patent: 4822645 (1989-04-01), Odo et al.
patent: 5211991 (1993-05-01), Bullock
patent: 5320879 (1994-06-01), Bullock

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