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Protection des composites à matrice céramique (CMC) contre la corrosion à haute température dans les moteurs aéronautiques

Abstract : The ceramic matrix composites can be used in aeronautic engines due to their high temperature stability and their mechanical properties. However, under a corrosive environment, an oxidation and then a recession of the CMC occured because of the volatilization of the silica scale formed at the surface of the composite. Consequently, in order to increase the lifetime of such materials, a external protection against corrosion is required. This is the aim of my Ph-D thesis. The experimental approach is the following : (i) identification of the coating materials ; (ii) validation of the selected materials by studying their structural stability and their chemical and thermomechanical compatibilities with the substrate ; (iii) determination of the thermal stability of the materials under a corrosive environment and (iv) behaviour of the coatings onto the CMC.
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https://hal-cnrs.archives-ouvertes.fr/tel-03607501
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Emilie Courcot. Protection des composites à matrice céramique (CMC) contre la corrosion à haute température dans les moteurs aéronautiques. Physique [physics]. Université Bordeaux 1, 2009. Français. ⟨tel-03607501⟩

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