A process for depositing a composite ceramic coating on a hard ceramic substrate
US4751109A · kind A · utility
25Cited by
28References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 20, 1987 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Jan 20, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2993
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.