Élaboration par caléfaction de revêtements carbone, oxycarbure et carbure pour des composites à matrice céramique à vocation aéronautique et nucléaire

Abstract : The growth of ceramic matrix composite (CMC) in the fields of aeronautic, spatial and nuclear pushes the development of new material and associated processes in order to answer to the tough requirements in this business sectors. Fabrication cost savings, in particular, has helped these improvements. In this aim, the LTCS has contributed to develop an original and alternative device for the synthesis of CMC’s interphases and matrices : the “film boiling densification”.This PhD as for key objective the study of original precursors for PyC and Si-O-C fabrication using this process. This manuscript is divided into two experimental parts dedicated to : i) the fabrication of carbon coatings from alcohols and ii) the fabrication of Si-O-C coatings from silylated precursors.The diverse characterization technics coupled to the numerous experiments permitted to connect the coatings structure and/or the chemical composition to the experimental parameters (precursor, temperature,duration). Optimal conditions were found for the preparation of high quality PyC from alcohols.For Si-O-C system, it is show that structure and chemical composition depends on experimental conditions.
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Amandine Lorriaux. Élaboration par caléfaction de revêtements carbone, oxycarbure et carbure pour des composites à matrice céramique à vocation aéronautique et nucléaire. Chimie-Physique [physics.chem-ph]. Université de Bordeaux, 2018. Français. ⟨NNT : 2018BORD0170⟩. ⟨tel-02145227v2⟩

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