Damage and Lifetime of Ceramic Matrix Composites

Dear Colleagues,

This Special Issue is dedicated to the latest research and developments in ceramic matrix composites, mainly in the field of damage and lifetime: Oxidation behavior and mechanical behavior.

Ceramic matrix composites (CMCs) are interesting materials for aeronautic applications owing to their good mechanical properties at high temperatures, even under air and their lightness. These composites have a non-brittle mechanical behavior, are tolerant to damage and exhibit better mechanical properties at high temperatures compared to metallic alloys.

CMCs are composite materials with long ceramic fibers clothes embedded in a ceramic matrix. Damage to these CMCs is a key point for the control of their durability. It is important to characterize this damage and to identify the responsible mechanisms, such as matrix multicracking, fibre/matrix debonding, fiber pull-out, fiber breakages using several techniques, such as acoustic emission, tomography, resistivity, ultrasonics, etc. In order to specify the lifetime of structures in service, suitable indicators must be defined. The role of the interactions between fibers and matrix acting at the interface level is very important. The oxidation behavior of CMCs must be taken into account, particularly its effect on the mechanical behavior. The behavior of CMCs and the lifetime under cyclic loading will be examined.  

Topics of interest (among others) include:

• Mechanical behavior at room and elevated temperatures,
• Detection and identification of several damage mechanisms,
• Environmental effects on durability,
• Oxidation mechanisms,
• Foreign object damage,
• Structural health monitoring
• Fatigue
• Lifetime evaluation

Prof. Gilbert Fantozzi
Dr. Nathalie Godin
Dr. Pascal Reynaud
Guest Editors

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