Dual-walled ceramic matrix composite (cmc) component with integral cooling and method of making a cmc component with integral cooling

A method of forming a CMC component with integral cooling, the method comprising:

• positioning a preform comprising a rigidized framework of ceramic fibers within a mold having an inner surface comprising a plurality of protrusions, the preform having a hollow shape enclosing at least one interior channel;
• introducing into the mold a slurry comprising particulate solids in a flowable carrier, the slurry (a) infiltrating the rigidized framework of ceramic fibers and (b) flowing over an outer surface of the preform and around the plurality of protrusions;
• removing or immobilizing the flowable carrier, the particulate solids (a) remaining in the rigidized framework of ceramic fibers and (b) being deposited on the outer surface of the preform between the protrusions, thereby forming a slurry-cast architecture on the outer surface of the preform;
• removing the mold;
• forming a plurality of through-thickness cooling holes in the preform, the cooling holes forming a cooling fluid path from the at least one interior channel through the slurry-cast architecture and out of the preform.