Diffuser for diffusing a gas flow within a stack of blanks and associated assemblies

A diffuser for diffusing a gas flow within a stack of blanks of parts based on carbon/carbon composite impregnated with a sol-gel type solution, the sol-gel type solution comprising a solvent and one or more compounds, the gas flow enabling the solvent to be evaporated by heat transfer, each blank having a central through hole, the central holes passing through blanks of the stack of blanks forming a central well of the stack of blanks, the diffuser comprising a plurality of diffusion vanes each comprising a central end and a peripheral end, the diffusion vanes extending from a central cavity of the diffuser to a periphery of the diffuser,

• each diffusion vane having a central through opening, the central through openings of the diffusion vanes forming the open central cavity of the diffuser, in order to form a gas inlet open upwardly when the diffuser is installed so as to be associated with the stack of blanks, a section of the central cavity decreasing from the gas inlet,
• said diffusion vanes being adapted to extend at least partially into the central well when the diffuser is installed so as to be associated with the stack of blanks, the diffusion vanes being adapted to diffuse and homogenize over an entire height of the stack of blanks the gas flow flowing from the central well through the stack of blanks.