Ultrathin laminated oxide coatings and methods
US4749629A · kind A · utility
29Cited by
25References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1987 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Jan 20, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C16/405
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.