Silicon nitride sintered body
US4978645A · kind A · utility
10Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Apr 7, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/5935
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A silicon nitride sintered body composed of .alpha.'-silicon nitride and .beta.'-silicon nitride, which are present in the ratio of 0.05-0.50 to 0.50-0.95 in terms of the peak strength ratio of X-ray diffraction, and have very small crystal grain size and specific compositions. The sintered body has high strength and high toughness and is superior in oxidation resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.