Methods of making composite ceramic articles having embedded filler
US5654246A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | May 26, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B41/87
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of making self-supporting ceramic composite structures having filler embedded therein includes infiltrating a permeable mass of filler with polycrystalline material comprising an oxidation reaction product obtained by oxidation of a parent metal such as aluminum. The self-supporting ceramic composite structure optionally contains therein non-oxidized constituents of the parent metal. The structure is formed by placing a parent metal adjacent to a permeable filler and heating the assembly to melt the parent metal and provide a molten body of parent metal which is contacted with a suitable oxidant. Within a certain temperature region and optionally, aided by one or more dopants in or on the parent metal, molten parent metal will migrate through previously formed oxidation reaction product into contact with the oxidant, causing the oxidation reaction product to grow so as to embed the adjacent filler and provide the composite structure. The parent metal may be provided as a body of metal placed in contact with an exterior surface of the permeable mass. Alternatively, the parent metal may be placed adjacent to the filler material by admixing a plurality of discrete bodies of p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.