We are looking for PhD candidates to study interfaces in SiC/SiC fiber composites. The project is in collaboration with CEA and Centre des Matériaux, MINES ParisTech under the supervision of Marie-Hélène Berger (MINES ParisTech), Cédric Sauder (DMN/SRMA/LTMEX) and Sylvie Poissonnet (DMN/SRMP).
Title : "Influence of Carbone interphases in SiC/SiC composites based on Hi-Nicalon S and Tyranno SA3 fibers"
Abstract
A new concept of SiC/SiC pin cladding patented by the CEA (“sandwich” concept) allows making this material a reference for GFR (Gas Fast Reactor). Optimization of mechanical behaviour of such composite is still a major concern from room temperature up to very high temperature. More, comprehension of phenomena governing fiber/matrix bonding is needed in SiC/SiC composite with Pyrocarbon interphase. A recent study demonstrated influences of fiber surface properties on composite mechanical behaviour. The aim of this work is to pursue this study with the objective of a better understanding of observed phenomena. Even if influence of fiber rugosities have been demonstrated, composition and microstructure influence of carbon phases present in this material is still a major concern. This work will be dedicated to a fine analysis of carbon interfaces to reach their origins and interactions. The final goal is to establish the mechanisms that control mechanical behaviour of SiC/SiC composites and thus to define the optimized materials for nuclear applications.
Please find some additional details in the attached file. Sorry it's in French : )
Contact : Marie-Hélène Berger (MINES ParisTech) marie-helene.berger [at] mines-paristech.fr> or Cédric Sauder (DMN/SRMA/LTMEX) cedric.sauder [at] cea.fr>
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| PhD_nterphase_SiCSiC.pdf | 56.65 KB |