Silicon nitride base sintered body
US5411923A · kind A · utility
9Cited by
2References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 15, 1991 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | May 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/597
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A silicon nitride body having a surface portion comprising .alpha. sialon, or .alpha. sialon and .beta. sialon wherein the ratio of .alpha. sialon relative to the sum of .alpha. sialon and .beta. sialon is at least 0.6; and an inner portion comprising .beta. sialon, or .alpha. sialon and .beta. sialon, wherein the ratio of .beta. sialon relative to the sum of .alpha. sialon and .beta. sialon is at least 0.6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.