Safran Ceramics

Stéphane Roger André Goujard

Arnaud Delehouze

Thierry Guy Xavier Tesson

Jean-François Daniel René Potin

Eric Bouillon

Sébastien Bertrand

Adrien Delcamp

Franck Lamouroux

Cédric Descamps

Christophe Paul Aupetit

Rémy Dupont

Charles Leleu

Emilie Lesizza

Matthieu Champagne

Jeff Roustand

Marc Montaudon

Benjamin Cossou

Guillaume Jean-Nicolas Laduye

Olivier Clausse

Lucas Mathoux-Heuls

Jean-Michel Garcia

A method for manufacturing a part of SiC/SiC composite material includes the production of a fibrous preform from silicon carbide fibers; the deposition of an interphase on the fibers of the fibrous preform; a first densification including the formation of a first matrix phase by chemical vapor infiltration with a first matrix precursor including methyltrichlorosilane (MTS); a second densification including the formation of a second matrix phase by chemical vapor infiltration with a second SiC precursor different from the first precursor, the second precursor forming an SiC deposit comprising residual hydrogen and free silicon; and a third densification including the impregnation of the fibrous preform with an impregnation composition containing at least silicon so as to obtain a part made of SiC/SiC composite material.

Method for manufacturing a part of SiC/SiC composite material

A method for manufacturing a structure by an additive manufacturing technique implementing a chemical vapor deposition assisted by focused energy radiation, includes the formation of a reinforcement which comprises a plurality of interconnected reinforcing elements made of ceramic or carbon, which define therebetween an interstitial volume having a tortuous shape along the deposition axis.

Additive manufacturing process for producing a structure

An installation for sintering a preform includes a sintering furnace in which a load is disposed, wherein the load includes a revolution preform disposed around at least one holding tool, the at least one holding tool including a disk and a crown present on the periphery of the disk, the crown being made of compressible material capable of being eliminated by thermal oxidation, a portion of the preform being in contact with the crown before sintering.

Holding tools for preform sintering

A method of consolidation includes placing a fibrous preform in the shaping recess of a shaping tool, and supplying the shaping tool with a gas phase to obtain a deposit in the fibrous preform, the shaping tool for the vapor phase chemical infiltration including first and second portions, having respectively first and second shaping zones surrounded by a first and second edge zones, the first and the second shaping zone defining a shaping recess to receive the fibrous preform. A gas injection port is present at least partially in the first or second edge zone and a gas outlet port is present at least partially in the first or second edge zone, the gas injection port and the gas outlet port placing the shaping recess in fluid communication with the outside of the shaping tool. Outer faces of the first and second portion are impermeable to gas.

Consolidation method using gas phase infiltration

A method for treating an aromatic mineral oil or a mixture of aromatic mineral oil and naphthenic mineral oil, the oil or the mixture of oils being loaded with polycyclic aromatic hydrocarbons, the method including a&#x2014;optional removal of polycyclic aromatic hydrocarbon s having a molecular weight greater than or equal to 200 from the aromatic mineral oil or the mixture of aromatic mineral oil and naphthenic mineral oil loaded with polycyclic aromatic hydrocarbons; b&#x2014;extraction, at a pressure lower than atmospheric pressure, of polycyclic aromatic hydrocarbons having a molecular weight lower than 200 solubilised in the oil or the mixture of oils obtained in step (a); and c&#x2014;recovery of the oil or the mixture of oils depleted in polycyclic aromatic hydrocarbons.

Method for treating an oil loaded with PAH

A method for densifying one or more porous substrates with pyrolytic carbon by chemical vapour infiltration, includes admitting, at the inlet of the densification furnace, a reactive gaseous phase including at least one pyrolytic carbon precursor; reacting at least a fraction of the reactive gaseous phase with the porous substrate or substrates; extracting, at the 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 includes at least one polyaromatic hydrocarbon compound.

Method for densifying composite matertals

A method for densifying porous annular substrates by chemical vapor infiltration, includes providing a plurality of unit modules including a support tray on which substrates are stacked, the support tray including a gas intake opening extended by an injection tube disposed in an internal volume formed by the central passages of the stacked substrates, the injection tube including gas injection orifices opening into the internal volume, forming stacks of unit modules in the enclosure of a densification furnace and injecting, into the stacks of unit modules, a gas phase including a gas precursor of a matrix material to be deposited within the porosity of the substrates.

Method for densifying porous annular substrates by chemical vapour infiltration

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Moissy-Cramayel, France

Stéphane Roger André Goujard