Refractory metal borides and composites containing them
US4595545A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1982 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Dec 30, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Refractory metal borides, carbides, nitrides and mixtures thereof of the Group IVb, Vb and VIb metals are produced from a glass or microcrystalline gel formed from organo-metallic precursors. Typically TiO.sub.2.B.sub.2 O.sub.3 glass is produced by hydrolysis of titanium butoxide and trimethyl borate, followed by gelling/drying. The glass may have carbon inclusions or may be mixed with carbon or aluminum powder or a mixture thereof, and reacted. In the case of aluminothermic and carboaluminothermic reduction, there is a residual aluminum-containing phase in the product. Composites can also be produced by including inert materials in the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.