Methods and compositions for formation of ceramic articles

Abstract

Compositions and methods useful for forming ceramic articles, such as, for instance, cores and shells for investment casting, are provided. The composition comprises a liquid that comprises a siloxane species; a plurality of particles, comprising a ceramic material, disposed within the liquid; a catalyst material disposed within the liquid; and a pore-forming agent disposed within the liquid. The pore-forming agent comprises a silicon-bearing agent that is substantially inert with respect to the liquid, and has an average molecular weight less than about 1300 grams per mole. The method comprises disposing any of the compositions described above in a desired shape; curing the siloxane species, and volatilizing the pore-forming agent to form a porous green body.

Dependencies are inferred from the claim text.