Method of manufacturing a piece aerodynamic by overmolding a casing on a preform for a composite ceramic

摘要

Method of manufacturing a part of the aerodynamic including: - the embodiment of a preform (300) of a composite material from a fibrous structure is densified by a matrix, said preform having smaller dimensions than those of the part of the aerodynamic forces to be produced, -, the layout of the preform made of composite material in a mold (400) with dimensions and an internal shape corresponding to those of the part of the aerodynamic forces to be produced, - the interposition of a ceramic powder (50) between the preform made of composite material and the inner surface (402a) of the mould, said ceramic powder having a thermal expansion coefficient which varies by more than 4.10 - 6.k - 1 with respect to the coefficient of thermal expansion of the composite material of the preform, said ceramic powder having a grain size between 0,25 μm and 25 μm, - the stabilization of the said powder so as to form around the preform made of composite material, a ceramic case with the dimensions and the shape of the part to provide aerodynamic.