Method for depositing composite coatings

Details Method for depositing composite coatings Method for depositing composite coatings

C - Chemistry, Metallurgy

23

C

117/128, 117/85

C23C 16/30 (2006.01) C23C 16/02 (2006.01) C23C 16/40 (2006.01) C23C 28/00 (2006.01)

Patent

CA 1329067

A METHOD FOR DEPOSITING COMPOSITE COATINGS 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 cemented carbide or hard ceramic substrate at 900°-1250°C for the cemented carbide substrate or about 900°-1500°C for the hard ceramic substrate, and 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.

556545

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