Process for manufacturing a ceramic composite material part by pressurized injection of a loaded slurry into a porous mould

A method of fabricating a composite material part, the method comprising:

• forming a fiber texture from refractory ceramic fibers;
• placing the fiber texture in injection tooling;
• injecting under pressure a slurry containing a powder of refractory ceramic particles into the fiber texture;
• draining liquid of the slurry that has passed through the fiber texture, while retaining the powder of refractory ceramic particles within said texture so as to obtain a fiber preform that is filled with refractory ceramic particles;
• drying the fiber preform;
• unmolding the fiber preform;
• and
• sintering the refractory ceramic particles present in the fiber preform in order to form a refractory matrix in said preform;
• wherein the injection tooling comprises a mold of porous material including an internal housing in which the fiber texture is placed and enclosed, the slurry being injected into the fiber texture via at least one injection port present in the injection tooling passing through the mold of porous material and leading into the internal housing of the porous material mold, the tooling further comprising an enclosure made of rigid material in which the porous material mold is held while injecting the slurry under pressure and while draining the liquid of said slurry, the liquid of the slurry being discharged via at least one vent present in the rigid material enclosure.