Ultrathin laminated oxide coatings and methods
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United States of America Patent
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Jun 7, 1988
Grant Date -
N/A
app pub date -
Jan 20, 1987
filing date -
Jan 20, 1987
priority date (Note) -
Expired
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Abstract
A wear resistant article, such as a cutting tool. A hard ceramic or cemented carbide substrate is coated with a laminated oxide coating about 0.3-20 microns thick, having at least three ultrathin layers. Each layer is an oxide layer about 0.1-3 microns thick, predominantly of a different material than adjacent layers. The oxide or oxides of adjacent layers may be dispersed as discrete particles within one or more of the layers. A process for producing the article is also disclosed.
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