Mitigating pyrophoric deposits during SiC CVI/CVD processes by introducing a mitigation agent into an exhaust conduit downstream of a reaction chamber
US11713281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2021 |
| Grant date | Aug 1, 2023 |
| Priority date | — |
| Expiry date | Dec 21, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/614
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Systems for and methods of manufacturing a ceramic matrix composite include introducing a gaseous precursor into an inlet portion of a reaction furnace having a chamber comprising the inlet portion and an outlet portion that is downstream of the inlet portion, and delivering a mitigation agent, such as water vapor or ammonia, into an exhaust conduit in fluid communication with and downstream of the outlet portion of the reaction chamber so as to control chemical reactions occurring with the exhaust chamber. Introducing the gaseous precursor densifies a porous preform, and introducing the mitigation agent shifts the reaction equilibrium to disfavor the formation of harmful and/or pyrophoric byproduct deposits within the exhaust conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.