Method of manufacturing a sintered material based on silicon nitride, and material obtained by the method
US4410636A · kind A · utility
16Cited by
10References
9Claims
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Key dates
| Filing date | Dec 7, 1982 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Dec 7, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/0682
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A silicon nitride material is obtained by natural sintering in the presence of a small quantity of yttrium oxide. The method comprises the steps of mixing silicon powder with relatively small quantities of aluminum powder and yttrium oxide powder, nitriding the mixture of powders, re-crushing the nitrided mixture of powders, shaping the re-crushed powders, and then sintering the shaped re-crushed powders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.