Sintered silicon carbide and silicon nitride base composite
US5122485A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1991 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Jan 23, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/5935
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing a sintered silicon carbide and silicon nitride base composite which is suitable for a material for automotive engine parts. The method is comprised of compacting a mixture including, as major components, powder of .beta.-type silicon carbide and powder of .alpha.-type silicon nitride to form a compact. The compact is first sintered at ordinary pressure, and then resintered at a pressure of nitrogen gas ranging from 10 to 2000 atmosphere and at a temperature higher 100.degree. to 200.degree. C. than that in the ordinary pressure sintering, thereby obtaining the sintered composite high in strength and toughness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.