Method for chemical infiltration in the gas phase for the densification of porous substrates with pyrolytic carbon
US8084079B2 · kind B2 · utility
5Cited by
9References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 23, 2006 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Sep 17, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S427/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of densifying a porous substrate with pyrolytic carbon includes loading the substrate into an oven, admitting a reaction gas mixture to the oven, extracting an effluent gas from the oven, and recycling components of the effluent gas into the reaction gas mixture. The reaction gas mixture contains a pyrolytic carbon precursor gas together with a vector gas. The effluent gas contains residual components of the reaction gas mixture together with reaction products, including hydrogen. The recycling is performed after eliminating heavy hydrocarbons contained in the effluent gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.