Composite of Si.sub.3 N.sub.4 by infiltration
US4689189A · kind A · utility
1Cited by
7References
9Claims
0Family size
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Key dates
| Filing date | Sep 15, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B41/86
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composite is produced by infiltrating the open pores of a polycrystalline silicon nitride body with a member selected from the group consisting of barium fluoride, calcium fluoride, magnesium fluoride, strontium fluoride, cerium fluoride, dysprosium fluoride, gadolinium fluoride, lanthanum fluoride, samarium fluoride, yttrium fluoride, and a mixture of said fluoride with a metal oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.