Process for making a silicon carbide whisker reinforced alumina ceramic composite precursor
US5032332A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1988 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Oct 6, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for preparing a ceramic composite material containing alpha silicon carbide whiskers is disclosed. In the process, a slurry containing non-aqueous liquid and aluminum material, amorphous carbon, and silica is provided. This slurry is thereafter pelletized, the pellets are dried, the dried pellets are preheated, and the preheated pellets are then ignited. The ignited pellets undergo an exothermic reaction, forming the composite containing alpha silicon carbide whiskers. The composite material is heat-treated by first heating it to a temperature of 900-1100 degrees centigrade at a rate of 8-15 degrees per minute, and then heating it to a temperature of 1,250-1,350 degrees centigrade at a rate of 2-5 degrees per minute.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.