Co-deposited coating of aluminum oxide and titanium oxide and method of making same
AssigneeMaterials Technology Corporation
InventorFrank Fonzi
Life of this patent
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Abstract
Disclosed is a method of forming dense protective coatings of co-deposited aluminum oxide and titanium oxide on wear surfaces. The coating is formed by simultaneously reacting an aluminum halide gas and a titanium halide gas with water vapor on a surface maintained at a temperature of about 900.degree. C to about 1250.degree. C. Reaction conditions are maintained to assure mixing of the titanium halide gas with the other reactants only in the reaction zone and compositions of the reactant gases are limited to produce a coating comprising alpha alumina (Al.sub.2 O.sub.3) with about 2% to about 10% hexagonal alpha titanium oxide (Ti.sub.2 O.sub.3) dispersed in the alumina matrix.
Claims6
An article of manufacture comprising:
- a. a substrate having a wear surface, and
- b. a dense continuous composite coating of aluminum oxide and titanium oxide adherently bonded to and covering at least a portion of said wear surface.
A cemented carbide work tool having a coating of alpha alumina containing from about 2% to about 10% hexagonal alpha titanium oxide dispersed therein adherently bonded to the wear surface of said work tool.
Dependencies are inferred from the claim text.