Pressure self-combustion sintering method
US4999144A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/651
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a pressure self-combustion sintering method for obtaining a ceramic sintered body. Conventionally, in order to sinter ceramics by the pressure self-combustion sintering method, a mixture comprising metallic elements and non-metallic elements has been inserted into an airtight vessel and then a filament formed of W, Mo and the like as a heat source for starting a reaction has been placed within said airtight vessel followed by heating by adding energy to this heat source from outside of the airtight vessel and applying an isostatic pressure to the mixture comprising metallic elements and non-metallic elements to start a synthetic reaction of ceramics from one end of said mixture, thereby carrying out a chain synthetic sintering of ceramics by a reaction heat. However, this method requires drawing a power supply lead wire formed of a filament made of W, Mo and the like out of the airtight vessel for the filament formed of W, Mo and the like placed within the airtight vessel while maintaining a airtightness. It has been said that this is remarkably difficult industrially. Accordingly, the pressure self-combustion sintering method has never been practic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.