TEXTILE PREFORMS SHEATHED IN A BORON NITRIDE COATING, COMPOSITES INCORPORATING THEM AND THEIR PREPARATION

摘要

the present invention aims: fibrous preform.a surface coated cubic boron nitride, and the coating was generated on the fibrous preform structure with a pre formed original granular microporous; wthermostructuraux composite rates.the texture of the fibrous reinforcement is formed by their respective preforms, preforms and preparations of thermostructuraux fibrous composites.the invention has the composite fibrous preform, fiber (f), followed the original interphase (ibn) embedded in the matrix (m) of densification.