Composite coatings on ceramic substrates
US4702970A · kind A · utility
36Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1987 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Jan 20, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C30/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.