112 - DETERMINATION OF INTERFACIAL PROPERTIES BETWEEN CERAMIC MATRIX COMPOSITE AND ITS ENVIRONMENTAL BARRIER COATING (CompTest 2025)
Ceramic Matrix Composites (CMCs) are considered as a promising alternative to metallic materials for the design of hot section components of aircraft engines [1]. Their high temperature thermomechanical and physical properties as well as their low density allow for high performances in extreme environments. In particular, silicon carbide (SiC) fiber reinforced SiC matrix CMCs are suitable for structures subjected to temperatures up to 1300°C. Yet, this kind of material is very sensitive to water vapor that causes recession [2]. To avoid this degradation mechanism, an Environmental Barrier Coating (EBC) is applied to the CMC surface to protect it and extend the life of CMC structures. The adhesion between the CMC and the EBC must be strong enough to withstand the temperatures and the oxidizing environment experienced by CMC components. To ensure this good adhesion, it is necessary to characterize the stress threshold and the fracture energy of the interface up to high temperatures. The aim of this work is to present several tests carried out at room and high temperatures to characterize these interfacial properties.
Date
21.05.2025.
Keywords
Ceramic Matrix Composites, Environmental Barrier Coating, Delamination, Mechanical properties, Finite elements
