Patent ID: 11897816
Assignee: SAFRAN
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  F | IPC C  F

Claim 5:
6. A process for manufacturing a multilayer structure comprising:
manufacturing a part made of ceramic matrix composite material coated with a bonding layer comprising silicon by implementing a process comprising:
coating an outer surface of a porous preform with a layer of a fugitive material in order to form a model of the coated part to be obtained having dimensions of the coated part,
coating the model formed with a ceramic powder composition,
heat treating the coated model to remove the fugitive material and form a ceramic shell mold by sintering of the ceramic powder composition,
introducing a molten composition comprising silicon into the shell mold to obtain the coated part in the shell mold, the molten composition infiltrating the porosity of the porous preform to form the ceramic matrix and covering the outer surface to form the bonding layer, ceramic and/or carbon particles being present in the porosity of the porous preform, and
separating the shell mold from the coated part obtained, and

forming a protective coating on the bonding layer.