Method of fabricating a ceramic material by infiltrating a porous preform

摘要

A method for fabricating a ceramic material (30) includes impregnating a porous structure (32) with a mixture that includes a preceramic polymer and a filler. The filler includes at least one free metal (50). The preceramic polymer material is then rigidized to form a green body. The green body is then thermally treated to convert the rigidized preceramic polymer material into a ceramic matrix (34) located within pores (36) of the porous structure (32). The same thermal treatment or a second, further thermal treatment is used to cause the at least one free metal (50) to move to internal porosity (38) defined by the ceramic matrix (34) or pores (36) of the porous structure (32).