C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/80 (2006.01) C04B 35/83 (2006.01) C04B 38/06 (2006.01)
Patent
CA 2666134
The invention relates to a process for manufacturing a part made of a composite comprising a fibrous reinforcement densified by a matrix, which process comprises the steps of: production of a fibrous preform consolidated by impregnation (S4) of a fibrous texture comprising yarns by means of a liquid consolidation composition containing a precursor of a consolidating material and transformation (S7) by pyrolysis of the precursor made of consolidating material so as to obtain a consolidated preform of maintained shape; and densification (S8) of the consolidated fibrous preform by chemical vapour infiltration, characterized in that it includes, before the impregnation (S4) of the fibrous texture with the liquid consolidation composition, a step (S2) of filling the porosity of the yarns of said texture by means of a filling composition.
L'invention concerne un procédé de fabrication d'une pièce en matériau composite comprenant un renfort fibreux densifié par une matrice, procédé comportant les étapes de : réalisation d'une préforme fibreuse consolidée par imprégnation (S4) d'une texture fibreuse comprenant des fils au moyen d'une composition liquide de consolidation contenant un précurseur d'une matière consolidante et transformation (S7), par pyrolyse, du précurseur en matière consolidante afin d'obtenir une préforme consolidée maintenue en forme, et; densification (S8) de la préforme fibreuse consolidée par infiltration chimique en phase vapeur, caractérisé en ce qu'il comprend, avant l'imprégnation (S4) de la texture fibreuse avec la composition liquide de consolidation, une étape de comblement (S2) de la porosité des fils de ladite texture au moyen d'une composition de comblement.
Dourges Marie-Anne
Jehl Dominique
Laxague Michel
Philippe Eric
Centre National D'etudes Spatiales
Sim & Mcburney
Snecma Propulsion Solide
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