Manufacture of silicon carbide articles
US5037588A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Aug 6, 1991 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/573
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of making a siliconized silicon carbide article by PA1 (i) injection-molding a mixture which comprises a major proportion of silicon carbide particles and a minor proportion of organic binder material, the mixture being flowable under heat and pressure, PA1 (ii) heating the molded article thus formed so as to remove the organic binder material from it and obtain a porous silicon carbide body containing elemental carbon, and PA1 (iii) impregnating the porous body with molten silicon to convert said carbon to silicon carbide which binds together the original silicon carbide particles, in which step (iii) is carried out by utilizing as a conduit for said molten silicon the sprue that is formed integrally with the injection-molded article in step (i). The method avoids excessive contact between the surface of the porous intermediate shaped body and molten silicon employed for siliconization, and so reduces the possibility of damage to that body while it is in the weakly bonded state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.