Method for manufacturing a part made of ceramic matrix composite material

Abstract

Method for manufacturing a part made of a ceramic matrix composite material. Method for manufacturing a part made of a ceramic matrix composite material having an improved surface finish, comprising: - the deposition, on a surface (S) of a fibrous preform (201a) of the part to be obtained, of a strip (201b) comprising (i) a fugitive organic binder, (ii) a powder of ceramic and / or carbon particles (20) present in a volume content in the strip (201b) of between 30% and 60%, and (iii) a polyoxyethylene aryl ether plasticizer, the total volume content of the binder and plasticizer in the strip (201b) being between 40% and 70%, and a volume ratio R [volume of binder in the strip] / [volume of plasticizer in the strip] being between 0.4 and 0.8, and - the formation of the ceramic matrix by infiltration of a porosity of the fibrous preform (201a) and ceramic and / or carbon particle powder (20) by molten silicon or a molten silicon alloy,The fugitive organic binder is eliminated during this step. Figure for the abbreviation: Fig. 5.