PROCEDE DE CREATION D'INTERFACE CARBONE SUR DES FIBRES DE CARBURE DE SILICIUM EN CONDITIONS HYDROTHERMALES

摘要

The present invention relates to a method of treating silicon carbide fibres comprising the step of chemically treating the fibres with water under homogeneous subcritical conditions or in the vicinity of the critical point at a pressure between the saturation vapour pressure and 30 MPa and at a temperature less than or equal to 400°C in order to selectively eliminate the silicon present at the surface of the fibres and to form a microporous carbon layer. It also relates to a method of fabricating a fibrous preform comprising the formation of a fibrous structure based on treated silicon carbide fibres and the use of this preform for fabricating a composite material part.