Aluminum nitride articles by carbothermal nitridation
US4857246A · kind A · utility
11Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1988 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Jan 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/581
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Aluminum nitride fibers or films are made by carbothermal nitridation of precursor fibers or films which contain a source of alumina and a source of carbon. Improved articles are obtained by providing a stoichiometric excess of carbon, by stabilizing the precursor prior to carbonization and nitridation, by removing excess carbon after nitridation and introducing a sintering aid to promote densification of the final structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.