Aerospatiale Societe Nationale Industrielle

Erik Menessier

Pierre Lespade

Alain Guette

Rene Pailler

Roger Naslain

Rene Paillier

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%.

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Talence, France

Erik Menessier