Surface coated Sialon-base ceramic materials for tools
US4539251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1984 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Jun 19, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24975
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A surface coated Sialon-base ceramic material for tools has its surface coated with a hard layer, and exhibits very excellent wear resistance when used in cutting tools and other wear resisting tools. The surface coated Sialon-base ceramic material comprises: a Sialon-base ceramic matrix and at least one hard coating layer formed over the surface of the above matrix, which consists essentially of at least one selected from the group consisting of carbide of Ti, Zr, or Hf, nitride thereof, carbo-nitride thereof, carbo-oxide thereof, and carbo-nitro-oxide thereof, preferably having a mean thickness within a range from 0.5 to 10 .mu.m. The above surface coated Sialon-base ceramic material for tools may further include at least one second hard coating layer formed on a surface of the above first-mentioned hard coating layer, which consists essentially of at least one selected from the group consisting of oxide of Al and nitro-oxide thereof, wherein the first-mentioned hard coating layer exists as an intermediate layer whereas the second hard coating layer exists as a surface layer. Preferably, the second hard coating layer has a mean thickness within a range from 0.5 to 5 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.