Patent ID: 8529995

Claim:
A method of fabricating a thermostructural composite material part, the method comprising: providing a fiber texture formed of yarns or tows, impregnating the yarns or tows with a consolidating composition in liquid form containing a carbon- or ceramic-precursor and refractory solid fillers in the form of a powder of mean grain size less than 200 nanometers, forming a fiber preform with said impregnated fiber texture and holding the fiber preform in a desired shape, pyrolyzing the carbon- or ceramic-precursor to obtain a fiber preform consolidated by a consolidating solid phase comprising the carbon or ceramic derived from the precursor and the refractory solid fillers, the impregnating being carried out such that the carbon or ceramic derived from the precursor occupies a volume representing 3% to 10% of the apparent volume of the preform and the refractory solid fillers occupy a volume representing 0.5% to 5% of the apparent volume of the preform, and densifying the consolidated fiber preform with a matrix by chemical vapor infiltration.