Sintered silicon nitride
US6977233B2 · kind B2 · utility
3Cited by
33References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2003 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Sep 22, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2300/2283
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Sintered silicon nitride products comprising predominantly β-silicon nitride grains in combination with from about 0.1 to 30 mole % silicon carbide, and grain boundary secondary phases of scandium oxide and scandium disilicate. Such products have high fracture toughness, resistance to recession, and resistance to oxidation at temperatures of at least 1500° C. Methods for preparing sintered silicon nitride products are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.