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Simulation numérique de la montée capillaire en espace confiné, en vue de l’application à des procédés d’élaboration de matériaux composites par imprégnation non-réactive ou réactive

Abstract : The development of ceramic matrix composites (CMCs) to replace certain metal components ininternal hot parts of aircraft engines is an active research field for the aeronautical industry. Theseadvanced components may be manufactured with a fluid processing called ReactiveMelt Infiltration(RMI). The densification step is the capillary rise of a molten metal such as silicon within a wovenpreform. The molten metal can react with the previously introduced ceramic powder and lead to arefractory matrix. The competition between capillary rise and the reaction between molten siliconand introduced carbon powder has to be managed. The ambition is to prevent choking off effectsand closed pores created by preferential paths. Simulations of two-phase flows at macroscopic scaleare undertaken with a homemade code developed in SAFRAN whereas simulations of two-phaseflows atmicroscopic scale were undertaken with CFD code Thétis (developed at I2M, Bordeaux). Anexperimental methodology for analysis of reactive or not reactive capillary impregnation in granularmedia is described.
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Submitted on : Wednesday, December 13, 2017 - 9:48:40 AM
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  • HAL Id : tel-01661546, version 2

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Audrey Pons. Simulation numérique de la montée capillaire en espace confiné, en vue de l’application à des procédés d’élaboration de matériaux composites par imprégnation non-réactive ou réactive. Mécanique [physics]. Université de Bordeaux, 2017. Français. ⟨NNT : 2017BORD0701⟩. ⟨tel-01661546v2⟩

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