Silicide composite with niobium-based metallic phase and silicon-modified Laves-type phase
US5942055A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1998 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Aug 10, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C27/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A silicide-based composite toughened with a niobium-based metallic phase and further containing a silicon-modified chromium-based Laves-type phase to promote oxidation resistance. The silicide-based composite generally contains one or more silicide intermetallic phases, each of which is an M.sub.5 Si.sub.3 -type or an M.sub.3 Si-type phase where M is at least Nb+Ti+Hf. The niobium-based metallic phase contains at least niobium, titanium, hafnium, chromium, aluminum and silicon. The silicon-modified Laves-type phase is of the Cr.sub.2 M type where M is Nb+Ti+Hf. The silicide-based composite is formulated to contain greater than 25 volume percent of the niobium-based metallic phase, the balance being the silicide intermetallic phases and the silicon-modified Laves-type phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.