Method for manufacturing a part made from CMC

A process for manufacturing a part made of a composite material with a matrix at least predominantly made of ceramic, the process comprising:

• producing a fibrous structure by three-dimensional or multilayer weaving;
• shaping the fibrous structure to form a fibrous preform core;
• depositing an interphase on the fibers of the preform core;
• consolidating the preform core by partial densification of said core comprising the formation of a matrix phase by chemical vapor infiltration or by a liquid process;
• depositing a powder of ceramic particles in a porosity of the preform core;
• wherein, said process comprises, after the steps of producing, shaping, depositing, consolidating and depositing, the following steps:
• draping one or more layers of pre-impregnated non-woven fibers over all or part of the outer surface of the preform core;
• performing a heat treatment of the preform core and of the pre-impregnated layer(s) to form a hybrid fibrous preform;
• further densifying by infiltration of the hybrid fibrous preform with an infiltration composition containing at least silicon in order to obtain a ceramic matrix composite part.