Aerospatiale Societe Nationale Industrielle

Snecma Propulsion Solide

Alain Guette

Pierre Lespade

Erik Menessier

Pierre Olry

Rene Pailler

Sylvie Loison

René Pailler

Roger Naslain

Christophe Soumailles

Rene Paillier

Roman Konig

A method of obtaining fiber textures of carbon from a cellulose precursor includes the steps of: spinning cellulose filaments () from a viscose solution or a cellulose solution; subjecting the cellulose filaments to washing in water (); impregnating the washed and non-dried cellulose filaments with an aqueous emulsion () of at least one organosilicon additive; drying the impregnated cellulose filaments; and obtaining a fiber texture made up of impregnated and dried cellulose filaments prior to carbonization.

Obtaining fiber textures of carbon by carbonizing a cellulose precursor

The invention is related to a heat treatment method for silicon and carbon-containing ceramic fibers as well as fibers of the same nature with a laminated structure and having an external carbon layer. The processing method for the invention comprises a heat treatment in vacuum, during at least three hours and at a temperature of about 1000.degree. C. This treatment yields fibers surrounded with a layer of endogenic SiO.sub.2, that is itself coated with a layer of endogenic carbon. Said fibers can be used to make composite materials with fiber reinforcement.

Heat treatment method for silicon and carbon-containing ceramic fibers

A method of manufacturing a composite material formed of a fibrous reinforcement and a silica based ceramic or vitro-ceramic matrix. The method includes impregnating the fibrous reinforcement by means of a sol-gel process wherein premature crystallization of the matrix obtained from the sol is hindered by addition to the sol of a crystallization retarding agent, and hot pressing the resulting material. The composite material formed has a residual porosity without the addition of nucleating agents of about less than 10%.

Method of manufacturing a composite material with vitroceramic or

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Le Bouscat, France

Alain Guette