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Elaboration par CVI/CVD et caractérisation de dépôts dans le système Si-N(-O)

Abstract : Ceramics are usually used at high temperature because of their refractory nature. However, they are too brittle to be submitted to high stresses, such as in the rotating parts of aircraft engines. One way to reduce the brittleness of ceramics is to design them as composites. The fiber/matrix architecture displays a damageable character thanks to a suitable interfacial layer, which is deposited on the fiber cloths before the infiltration with molten silicon. The aim of the thesis is to propose and evaluate a solution to protect the fiber reinforcement during the impregnation step with liquid silicon. This solution involves the deposition of a protective layer made of silicon nitride or oxynitride.
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Submitted on : Tuesday, September 15, 2020 - 1:02:26 AM
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Benjamin Cossou. Elaboration par CVI/CVD et caractérisation de dépôts dans le système Si-N(-O). Matériaux. Université de Bordeaux, 2018. Français. ⟨NNT : 2018BORD0144⟩. ⟨tel-02938556⟩

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