NOVEL THERMOPROTECTIONS OBTAINED BY A FILAMENT WINDING PROCESS AND USE THEREOF

摘要

The invention consists of a novel composite material obtained by winding a reinforcing yarn (21), made of refractory fibres, around a form, a mandrel (47), the wound yarn being impregnated, as it is wound, with a "slurry" constituted of a liquid resin mixed with fillers constituted of particles of refractory material. The reinforcing yarn (21) is constituted of linear fibres and fibres that form protruding loops which give the wound reinforcement a three-dimensional texture. The yarn preform constituted by the reinforcing yarn impregnated with "slurry" (41) is crosslinked according to a defined heating cycle comprising several temperature ramps of different durations. The crosslinked yarn preform is then machined so as to fashion the element of composite material thus produced in the desired form. The element of composite material thus formed may optionally be reinforced by overwinding on its outer face a reinforcing yarn previously impregnated with a resin that is chemically compatible with the resin constituting the material.