Patent ID: 11891342
Assignee: SAFRAN AIRCRAFT ENGINES
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. Manufacturing method for a fibrous preform of a composite material part, the preform being obtained by:
forming a fibrous texture from refractory ceramic fibres,
shaping the fibrous texture in a mould cavity present in an injection tool,
injecting a slurry containing a refractory ceramic particle powder into the fibrous texture present in the mould cavity,
draining the liquid from the slurry that passed through the fibrous texture and retaining the refractory ceramic particle powder inside said texture so as to obtain a fibrous preform loaded with refractory ceramic particles,
first demoulding of the fibrous preform,
wherein the method also comprises, after the first demoulding of the fibrous preform, the following steps:
immersing the demoulded fibrous preform in a bath of a liquid suitable for decompacting the refractory ceramic particles present in the fibrous preform,
shaping the wet fibrous preform in a mould cavity present in an injection tool,
eliminating the liquid present in the fibrous preform,
additionally injecting a slurry containing a refractory ceramic particle powder into the fibrous preform present in the mould cavity,
draining the liquid from the slurry that passed through the fibrous preform and retaining the refractory ceramic particle powder inside said texture so as to obtain a fibrous preform loaded with refractory ceramic particles,
second demoulding of the fibrous preform.