Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Snecma Moteurs

Societe Europeenne De Propulsion

Snecma Propulsion Solide

Societe Nationale D'etude Et De Construction De Moteurs D'aviation-Snecma

Societe Europeene De Propulsion

Herakles

Jean-Luc Domblides

Bernard Delperier

Jacques Thebault

Christian Robin-Brosse

Gilles Bondieu

Sébastien Bertrand

Bruno C Bernard

Jean-Luc Leluan

Yves D Patrigeon

Jean-Philippe Richard

Pierre Delaurens

Jean-Marie Toussaint

Bruno Bernard

Sebastien Bertrand

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.

Method for chemical infiltration in the gas phase for the densification of porous substrates with pyrolytic carbon

A porous substrate having a concave inside face and an outside face is disposed in an enclosure, and reactive gas is introduced into the enclosure to densify the substrate. At least a portion of the gas is divided into two non-zero fractions. The first fraction of the gas is fed to the inside face of the substrate. The second fraction of the gas is fed to only the outside face of the substrate. Alternatively, the first fraction of the gas is fed via a tooling extending into an inside volume defined by the concave inside face of the substrate.

Densifying hollow porous substrates by chemical vapor infiltration

The present invention provides a method of densifying porous structures by chemical vapor infiltration. In characteristic manner, said densification method is implemented using toluene as a precursor for carbon. Said toluene is generally used mixed with at least one carrier gas.

CVI (chemical vapor infiltration) densification of porous structures

Chemical vapor infiltration method with variable infiltration parameters

Chemical vapor infiltration process of a pyrocarbon matrix within a

Vapor phase chemical infiltration process of a material into a porous

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Bruges, France

Jean-Luc Domblides