Snecma Propulsion Solide

Herakles

Rémi Bouvier

Eric Bouillon

Dominique Coupe

Caroline Louchet-Pouillerie

François Charleux

Eric Philippe

Henri Tawil

Gérard Gueldry

An environmental barrier is formed on a substrate () of ceramic matrix composite material and comprises an outer anticorrosion protection layer () containing a compound of the type comprising an aluminosilicate of an alkali, or an alkaline-earth, or a rare-earth element. A bond sub-layer () is formed between the substrate () and the protection layer (), the composition of the bond sub-layer varying from substantially pure silicon to substantially pure mullite between an inner face beside the substrate and an outer face, with the silicon content decreasing and the mullite content increasing.

Composite material component with silicon-containing ceramic matrix, protected against corrosion

A fiber reinforcing texture woven as a single part for fabricating a composite material part having an inner portion, or core, made by three-dimensional weaving with yarns made up from discontinuous fibers, and a portion adjacent to an outside surface, or skin, made by weaving with yarns made up from continuous filaments.

Fiber reinforcing texture for making a composite material part

A fiber reinforcing texture () woven as a single part for fabricating a composite material part having an inner portion (), or core, made by three-dimensional weaving with yarns made up from discontinuous fibers, and a portion () adjacent to an outside surface, or skin, made by weaving with yarns made up from continuous filaments.

A fiber preform for constituting the fiber reinforcement of composite material is prepared and then consolidated by depositing sufficient matrix phase therein to bond the fibers together while not completely densifying the preform. Pins of rigid material are put into place through the consolidated preform and densification of the consolidated preform containing the pins is continued by depositing at least a ceramic matrix phase. Thereafter, at least a portion of each pin is eliminated so as to leave a calibrated perforation passing through the resulting part, the pins being made at least in part out of a material that can be eliminated by applying treatment that does not affect the ceramic material of the matrix.

Method of making a multi-perforated part out of ceramic matrix composite material

A porous fiber structure is consolidated by forming within a deposit of a refractory material by partially densifying the fiber structure in such a manner as to bond together the fibers of the fiber structure so as to enable the fiber structure to be handled without being deformed, while leaving empty the major fraction of the initial pore volume of the fiber structure, and rigid pins are implanted through the consolidated porous structure. A blank is obtained by reinforcing a fiber structure by implanting pins or by bonding together consolidated fiber structures, the bonding being performed by implanting pins. A composite material part is obtained by densifying the blank.

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Merignac, France

Rémi Bouvier