Coating processes – Coating by vapor – gas – or smoke – Base includes an inorganic compound containing silicon or...
Patent
1987-01-20
1988-06-14
Childs, Sadie L.
Coating processes
Coating by vapor, gas, or smoke
Base includes an inorganic compound containing silicon or...
427249, 4272552, 4272553, 4272557, 4274192, 4274197, C23C 1632, C23C 1640
Patent
active
047511095
ABSTRACT:
A process for producing a wear resistant article, such as a cutting tool. Gaseous halides of two or more of aluminum, zirconium, and yttrium with other reactants are passed over a hard ceramic substrate at 900.degree.-1500.degree. C., and at 1 torr to about ambient pressure to form a composite ceramic coating on the substrate. The coating is a continuous first-phase metal oxide matrix having particles of at least one different metal oxide dispersed therein. In a preferred process, one or more of the metal halides is pulsed into the gaseous mixture containing a different metal halide, to control the deposition of the particles.
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Gindraux Gilbert
Hintermann Hans E.
Sarin Vinod K.
Childs Sadie L.
Craig Frances P.
GTE Laboratories Incorporated
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