Method of making shaped ceramic composites
US5024795A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1988 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Dec 6, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/652
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method for producing a self-supporting ceramic composite by the oxidation of a parent metal to form a polycrystalline ceramic material consisting essentially of the oxidation reaction product of the parent metal with an oxidant, including a vapor-phase oxidant, and, optionally, one or more metallic constituents. A permeable filler material, such as a preform, with at least one surface bearing a permeable stratum, is contacted with a body of molten parent metal heated to a temperature above its melting point but below the melting point of the oxidation reaction product. At least a portion of the oxidation reaction product is maintained in contact with and between the molten metal and oxidant to transport the molten metal through the oxidation reaction product toward the permeable stratum and into contact with the oxidant so that the oxidation reaction product continues to form at the interface between the oxidant and previously formed oxidation reaction product that has infiltrated the filler material. The reaction is continued to infiltrate at least a portion of the stratum with the oxidation reaction product and to produce an intermediate ceramic b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.