Process for uniformly integrating a solid charge within a porous substrate

摘要

The process is particularly well suited to the manufacture of composite materials, where a fibrous reinforcement texture is to be impregnated by a densifying matrix, and comprises the steps of: preparing a slurry containing a solid charge in the form of finely divided particles dispersed in a carrier liquid, which preferably contains an organic compound, placing a substrate inside an enclosure, creating a vacuum inside the enclosure, and causing the slurry to pass through the substrate by means of a pressure difference. Uniformity of charge integration is ensured by forcing the slurry to pass through the substrate several times, in successively opposite directions. The concentration of solid charge in the slurry can be determined as a function of an intended charge percentage by volume in said substrate.