Abstract: A diffuser for diffusing a gas flow within a stack of blanks that are impregnated with a sol-gel solution, the gas flow evaporating a solvent, each blank having a central through-opening, the openings forming a central well, includes diffusion fins extending from a central cavity toward the periphery of the diffuser, each fin having a central through-opening, the openings forming the open central cavity of the diffuser so as to form an upwardly open gas inlet, the cross section of the central cavity decreasing from the gas inlet, the fins extending into the central well, the fins diffusing and homogenizing the gas flow flowing from the central well through the stack.

Abstract: A method for drying a blank of a part made of a carbon/carbon composite material impregnated with a sol-gel solution, the solution including a solvent and one or more compounds, in a system forming an oven includes gelling the solution so as to form a gel within the blank disposed in the chamber by heating a chamber, where a gas circulator and a desaturation component are deactivated, so as to restrict circulation and desaturation of the gas in a solvent, and drying the gel within the blank by heating, where the gas circulator and the desaturation component are activated, so as to enable circulation and desaturation of the gas in a solvent.