Societe Europeenne De Propulsion

Snecma Propulsion Solide

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

Centre National De La Recherche Scientifique

Herakles

Christian Robin-Brosse

Jacques Thebault

Jean-Luc Domblides

Bruno C Bernard

Bernard Delperier

Gilles Bondieu

Pierre Olry

Sébastien Bertrand

René Pailler

Lionel Vandenbulcke

Jacques Rey

Eric Sion

Nathalie Nicolaus

Yves D Patrigeon

Aline Balhadere

St&eacute;phane Goujard

Jacky Minet

Jean-Luc Charvet

Isabelle Mouricou

Jacques A Moreau

Yves Madec

Sylvie Bonnamy

Yannick Claude Breton

Aurélie Quet

Bruno Bernard

Sebastien Bertrand

The invention relates to a method of making a refractory carbide layer on the accessible surface of a C/C composite material, the method including a step consisting in placing the composite material in contact with a reactive composition in solid form that contains an atomic proportion greater than or equal to one-third and less than or equal to 95% of a metal that is a precursor of a determined carbide having a melting temperature greater than 2000&#xb0; C., and an atomic proportion of silicon that is greater than or equal to 5% and less than or equal to two-thirds. The method further includes a step consisting in impregnating the accessible surface of the C/C composite material with the reactive composition melted at a temperature that is greater than or equal to the melting temperature of the metal that is a precursor of a determined carbide.

Method for making a refractory carbide layer on a part made of C/C composite material

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

Carbon nanotubes are incorporated in the fiber structure by growing them on the refractory fibers of the substrate so as to obtain a three-dimensional substrate made of refractory fibers and enriched in carbon nanotubes. The substrate is densified with a matrix to form a part of composite material such as a friction part of C/C composite material.

Method of making a three-dimensional fiber structure of refractory fibers

The invention concerns (1) thermochemically treating by pack-cementation a carbon-containing material, which may have an open porosity, to generate a refractory carbide coating on its surface and, if the material is porous, within the material; and (2) the use of specific alloys as a pack for thermochemically treating carbon-containing materials, optionally with an open porosity, in a halogenated atmosphere. Pack-cementation is carried out under reduced pressure using an element E (to be transported and to be reacted with the carbon in the material to generate the expected carbide) alloyed to an element M, and using a halide (chloride or fluoride, preferably a fluoride) of the same element M, of low volatility, present in the solid form.

Thermochemical treatment, in halogenated atmosphere, of a carbon-containing material

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

Method of densifying porous substrates by chemical vapor infiltration of

Vapor phase chemical infiltration process of a material into a porous

A fiber preform is initially consolidated by being impregnated with a thermosetting impregnation composition that contains a ceramic precursor, and by heat treatment at the end of which the precursor has been transformed into ceramic, without passing through a meltable phase. The consolidated preform is then densified. The impregnation composition is constituted by a mixture of a thermosetting monomer and a ceramic precursor polymer, and the monomer is cross-linked during the heat treatment so as to achieve 'in situ' cross-linking of the polymer mixture prior to transforming the precursor into ceramic.

Method of manufacturing parts made of ceramic matric composite material

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Le Haillan, France

Christian Robin-Brosse