Patent ID: 7238247

Claim:
A method of making a multi-perforated part out of ceramic matrix composite material, the method comprising the steps of: preparing a fiber preform having fibers and pores for constituting a fiber reinforcement of the composite material; consolidating the preform by partial densification by forming within the preform a solid matrix phase having a thickness sufficient for binding the fibers of the fiber preform to one another, but without densifying the preform completely, a volume ratio of the pores in the preform being reduced by no more than 40%; putting a plurality of pins of rigid material into place through the consolidated preform without the consolidated preform being deformed; continuing densification of the consolidated preform provided with the pins by depositing a ceramic material forming at least one ceramic matrix phase; and eliminating at least a portion of each pin so as to leave a calibrated perforation passing through the part, the pins being made at least in part out of a material that can be eliminated by applying a treatment that does not affect the deposited ceramic material.