Process for producing ceramic matrix composites by liquid infiltration of ceramic polymeric precursors

A process for making ceramic composite material comprising the steps of:

• step I:
• impregnating the single cloths of ceramic fibers with a solution of a polymer which is a ceramic precursor;
• step II:
• hardening the cloths provided by step I;
• step III;
• pyrolysis of the hardened cloths to form a pyrolysed material;
• step IV;
• repeatedly thickening the pyrolyzed material by a thickening process comprising infiltrating polymer which is a ceramic precursor into the pyrolyzed material and pyrolyzing the material after infiltration;
• wherein the precursor solution of said step I comprises filling powder with a nanometric granulometry, wherein the particle sizes of respective particles of the filling powder are lower than a mean distance between the fibers and wherein the filling powder is produced by a laser pyrolysis process in which a laser heats a molecular beam of gas precursors, causing the decomposition thereof and the formation of SiC particles with a size controlled by the reaction temperature and the dwell time of the gas precursors in the radiation area.