A method of making a fiber preform for manufacturing parts...

C - Chemistry – Metallurgy – 04 – B

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C04B 41/50 (2006.01) C04B 35/83 (2006.01) F16D 69/02 (2006.01)

Patent

CA 2594535

One or more two-dimensional fiber fabrics of carbon or carbon precursor fibers are impregnated (58, 59) by a solution or a suspension capable of allowing a dispersion of discrete ceramic particles to remain in the fiber fabric, and a fiber preform (51) is made by superposing plies formed of two-dimensional fabric made of carbon or carbon precursor fibers, the plies being bonded to one another, and at least some of the plies being at least partially formed of a previously- impregnated two- dimensional fabric. The field of application is particularly that of friction parts made of C/C composite material with incorporated ceramic particles.

La présente invention se rapporte à un procédé, qui consiste à imprégner (58, 59) un ou plusieurs tissus de fibres bidimensionnels constitués de fibres de carbone ou de fibres de précurseur de carbone, avec une solution ou une suspension permettant à une dispersion de particules céramiques distinctes de rester dans le tissu de fibres, et à produire une préforme de fibres (51) en superposant des couches formées d'un tissu bidimensionnel fait de fibres de carbone ou de fibres de précurseur de carbone, les couches étant liées les unes aux autres, et au moins certaines des couches étant au moins partiellement formées d'un tissu bidimensionnel préalablement imprégné. L'invention peut être appliquée en particulier aux pièces de frottement constituées d'un matériau composite C/C contenant des particules céramiques incorporées.

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