Herakles

Universitë De Bordeaux

Arianegroup Sas

Safran Ceramics

Université Bordeaux 1

Emilie Courcot

Eric Bouillon

Eric Philippe

Jacques Thebault

Francis Rebillat

Arnaud Delehouze

Henri Tawil

Caroline Louchet-Pouillerie

Sébastien Jimenez

Anne Sauveroche

Caroline Louchet

A method of fabricating a composite material part, the method including making a consolidated fiber preform, the fibers of the preform being carbon or ceramic fibers and being coated with an interphase; obtaining a consolidated and partially densified fiber preform, the partial densification comprising using chemical vapor infiltration to form a first matrix phase on the interphase; and continuing densification of the fiber preform by infiltrating an infiltration composition containing at least silicon and at least one other element suitable for lowering the melting temperature of the infiltration composition to a temperature less than or equal to 1150&#xb0; C.

Process for fabricating composite parts by low melting point impregnation

A part including a substrate in which at least a portion adjacent to a surface of the substrate is made of a refractory material containing silicon, is protected by an environmental barrier formed on the surface of the substrate and having at least a self-healing layer containing a rare earth silicate. The self-healing layer is formed: for at least 90 mol %, by a system constituted by 30 mol % to at most 80 mol % of at least one rare earth silicate RESiO, RE being a rare earth, and at least 20 mol % to 70 mol % of manganese oxide MnO; and for at most 10 mol %, by one or more oxides other than MnO, having a eutectic point with SiO2 less than or equal to 1595&#xb0; C.; the self-healing layer presenting a liquid phase having a self-healing function at least throughout the temperature range 1200&#xb0; C. to 1400&#xb0; C., while conserving a majority solid phase.

Environmental barrier for a refractory substrate containing silicon

In order to protect a substrate having at least a portion adjacent to a surface that is made of a refractory material containing silicon, while the substrate is in use at high temperature in a medium that is oxidizing and wet, there is formed on the surface of the substrate an environmental barrier that contains no boron and that has at least one layer that is essentially constituted by a system of oxides formed by at least one rare earth oxide, silica, and alumina, and that is capable of self-healing by maintaining the presence of at least one solid phase in a temperature range extending up to at least 1400&#xb0; C. approximately.

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Le Taillan Medoc, France

Emilie Courcot