CPC C23C 16/045 (2013.01) [B01D 53/24 (2013.01); C04B 35/62873 (2013.01); C04B 35/62884 (2013.01); C04B 35/83 (2013.01); C23C 16/26 (2013.01); C23C 16/4412 (2013.01); C23C 16/45593 (2013.01); F16D 69/023 (2013.01); C04B 2235/422 (2013.01); C04B 2235/5248 (2013.01); C04B 2235/5252 (2013.01); C04B 2235/614 (2013.01); F16D 2200/0052 (2013.01); F16D 2200/0065 (2013.01)] | 7 Claims |
1. A method for densifying one or more porous substrates with pyrolytic carbon by chemical vapour infiltration, comprising:
admitting, at an inlet of a densification furnace, a reactive gaseous phase comprising at least one pyrolytic carbon precursor;
reacting at least a fraction of the reactive gaseous phase with the one or more porous substrates;
extracting, at an outlet of the densification furnace, gaseous effluents originating from the reactive gaseous phase;
reintroducing, with the reactive gaseous phase admitted at the inlet of the densification furnace, at least a fraction of the gaseous effluents extracted at the outlet of the furnace;
wherein the fraction of the gaseous effluents introduced with the reactive gaseous phase comprises at least one polyaromatic hydrocarbon compound.
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