Process for producing highly tough ceramics
US5106788A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1991 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Aug 6, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/111
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Highly tough ceramics are produced by: PA1 providing a formulation comprised of 20 to 50% by weight of titanium carbide expressed in terms of the general formula TiCx wherein x is 0.65 to 0.93, 0.1 to 2% by weight of one or more sintering aids, and 48-79.9% by weight of Al.sub.2 O.sub.3, and PA1 sintering said formulation by the press-sintering process. Alternatively highly tough ceramics are produced by: PA1 providing a formulation comprised of 20 to 50% by weight of titanium carbide expressed in terms of the general formula TiCx wherein x is 0.65 to 0.93, 0.05 to 3.0% by weight of one or more rare earth oxides, and 47 tto 79.95% by weight of Al.sub.2 O.sub.3 ; PA1 subjecting the formulation to primary sintering in an inert gas until relative theoretical density of 95-99% is achieved, and PA1 sintering the resultant mass by the hot isostatic pressing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.