Method of fabricating a composite material part by injecting a filled slurry into a fiber texture

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

• forming a fiber texture from refractory ceramic fibers;
• placing the fiber texture in a mold including in its bottom portion a part made of porous material on which a first face of said texture rests;
• closing the mold with a mold cover or lid placed facing a second face of the fiber texture;
• injecting a liquid under pressure into the fiber texture, the liquid containing a powder of refractory ceramic particles or of refractory ceramic precursor particles;
• draining via the porous material part the liquid that has passed through the fiber texture, while said porous material part retains the powder of refractory ceramic particles or of refractory ceramic precursor particles within said texture so as to obtain a fiber preform filled with refractory ceramic particles or with refractory ceramic precursor particles, the liquid being discharged via at least one vent present in the bottom of the mold;
• drying the fiber preform;
• unmolding the fiber preform;
• and
• subjecting the refractory ceramic particles or the refractory ceramic precursor particles present in the fiber preform to heat treatment so as to form a refractory ceramic matrix in said preform;
• a perforated rigid element being interposed between the bottom of the mold and the porous material part, said perforated rigid element comprising walls delimiting separate perforations that extend through an entire thickness of the perforated rigid element;
• wherein the lower edge of said walls in contact with the inside surface of the bottom of the mold includes notches or cutouts to (a) allow said liquid to flow along said inside surface and along a first direction from a first of the perforations to a second of the perforations adjacent the first of the perforations via a first of said notches or cutouts and (b) allow said liquid to flow along said inside surface and along a second direction from said first or second of the perforations to a third of the perforations adjacent the first or second of the perforation via a second of said notches or cutouts, said first direction and said second direction being two different non-parallel directions.