Method of fabricating an impregnated fiber assembly

A method of fabricating an impregnated fiber assembly, the method comprising:

• introducing a first suspension comprising a first powder of solid particles of ceramic material, of metal material, or of carbon material into an inside volume defined by an inside face of a first fiber texture of hollow shape placed in a mold, an outer face of the first fiber texture being present facing a wall of the mold;
• using the action of centrifugal force to impregnate the first fiber texture with the first suspension by rotating the mold in order to fill the pores of the first fiber texture in part with the first powder;
• after impregnating the first fiber texture with the first suspension stopping the rotation of the mold, and then, removing a first portion of the mold situated in a first region facing the outside face of the first fiber texture;
• positioning a second fiber texture while the rotation of the mold is stopped on the outer face of the first fiber texture in the first region in order to obtain a fiber assembly;
• positioning a second mold portion in the first region, the second mold portion, once in position, being situated facing an outer face of the second fiber texture;
• introducing a second suspension comprising a second powder of solid particles made of ceramic material, of metal material, or of carbon into the inside volume;
• and
• using the action of centrifugal force to impregnate the first and second fiber textures with the second suspension by rotating the mold fitted with the second mold portion in order to obtain the impregnated fiber assembly, the second suspension passing through the first fiber texture in order to reach the second fiber texture during this impregnation step, the impregnation with the first suspension and the impregnation with the second suspension being carried out at different speeds of rotation of the mold.