Method for manufacturing a refractory part made of composite material

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

• forming a fiber texture from refractory fibers;
• placing the fiber texture in a mold having an impregnation chamber including in its bottom portion a part made of porous material on which a first face of said texture rests, the impregnation chamber being closed in its top portion by a deformable impermeable diaphragm placed facing a second face of the fiber texture, said diaphragm separating the impregnation chamber from a compacting chamber;
• injecting a slip containing a powder of refractory particles into the impregnation chamber between the second face of the fiber texture and the diaphragm;
• injecting a compression fluid into the compacting chamber, the fluid exerting pressure on the diaphragm to force the slip to pass through the fiber texture;
• draining, via the porous material part, the liquid of the slip that has passed through the fiber texture while retaining the powder of refractory particles inside said texture by means of said part of porous material so as to obtain a fiber preform filled with refractory particles;
• drying the fiber preform;
• unmolding the fiber preform;
• and
• sintering the refractory particles present in the fiber preform in order to form a refractory matrix in said preform.