Composite coatings on ceramic substrates

Details Composite coatings on ceramic substrates Composite coatings on ceramic substrates

1987-01-20

1987-10-27

Kittle, John E.

Stock material or miscellaneous articles

Composite

Of inorganic material

428689, 428698, 428701, 4272552, 4272553, 51309, B32B 900

Patent

active

047029706

ABSTRACT:
A wear resistant article, such as a cutting tool. A hard ceramic substrate is coated with a composite ceramic coating having at least two phases. The first phase is a continuous oxide matrix layer 0.1-20 microns thick of oxides of alumina, zirconia, or yttria. At least one discontinuous second or additional phase of oxides of aluminum, zirconium, or yttrium, or solid solutions thereof, is dispersed as discrete particles within the matrix layer. The additional phase material is different from the matrix material.

REFERENCES:
patent: Re32111 (1986-04-01), Lambert et al.
patent: 4441894 (1984-04-01), Sarin et al.
patent: 4578087 (1986-03-01), Tanaka et al.
patent: 4598053 (1986-07-01), Yamakawa et al.
patent: 4619866 (1986-10-01), Smith et al.

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