Method of siliciding thermostructural composite materials, and parts obtained by the method
US8261891B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2009 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Jun 3, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/259
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Within the pores of a porous thermostructural composite material, there is form an aerogel or xerogel made up of a precursor for a refractory material, the precursor is transformed by pyrolysis to obtain an aerogel or xerogel of refractory material, and then it is silicided by being impregnated with a molten silicon type phase. The aerogel or xerogel is formed by impregnating the composite material with a composition containing at least one organic, organometalloid, or organometallic compound in solution, followed by in situ gelling. The method is applicable to improving the tribological properties or the thermal conductivity of C/C or C/SiC composite material parts, or to making such parts leakproof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.