Method of fabricating a fiber preform filled with refractory ceramic particles

A method of fabricating a composite material part and including the following step:

• sintering refractory ceramic particles present in a fiber preform, wherein the fiber preform is obtained by performing a process to form a refractory matrix in pores of said fiber preform, the process comprising
• a) placing a fiber texture comprising refractory ceramic fibers in a mold cavity defined by a mold and a countermold;
• b) injecting a slip comprising a powder of the refractory ceramic particles present in a liquid medium, the slip being injected into pores of the fiber texture present in the mold cavity, injection being performed through at least a first face of said fiber texture, wherein during step b), the slip is injected into the mold cavity through one or more injection ports, and prior to step b), the slip presents a volume content of refractory ceramic particles that is less than or equal to 40%;
• and
• c) draining the liquid medium of the slip that has penetrated into the fiber texture through a porous material part having thickness greater than or equal to 0.1 mm, the draining being performed at least through a second face of the fiber texture different from the first face, the first face and the second face both extending from edge to edge, and each edge extending along a thickness of the fiber texture, said porous material part also serving to retain the powder of refractory ceramic particles in the pores of the fiber texture in order to obtain a fiber preform filled with refractory particles, the porous material part being present between the mold and the fiber texture or between the countermold and the fiber texture, and the porous material part being present between at least one outlet vent and the fiber texture, pumping being performed at the outlet vent in order to drain the liquid medium through said outlet vent.