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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Imaging
Presentation Title In-situ Synchrotron 3D X-ray Imaging of Damage Initiation in CMC's Due to Oxidation Corrosion at High Temperature
Author(s) Hrishi Bale, Aly Badran, David B. Marshall, Robert O. Ritchie
On-Site Speaker (Planned) Hrishi Bale
Abstract Scope Ceramic-matrix-composites (CMC’s) are being developed for service conditions of high temperatures and loads, well beyond the realm of current structural materials. Using various strategies and coatings with integral 3-D architectural designs, woven-CMCs make development of such ultrahigh-temperature structures feasible. Fracture assessment and lifetime prediction presents a formidable challenge, as reliable mechanical data and damage characterization must be achieved in 3-D at high temperatures. Using synchrotron X-ray micro-tomography to perform such characterization under load, oxidative environment and temperatures approaching 2000°C, we report here the contrasting damage modes in a woven SiC-fiber/SiC-matrix composite at high temperature. We observe for the first time in 3D, the degradation of BN interface and formation of damage initiation sites along the fiber-matrix interface layers. This ability to image complex 3-D materials undergoing failure at extreme temperatures opens new possibilities for evaluating CMC’s in real-time including the study of creep, load cycling and oxidation on the performance.
Proceedings Inclusion? Planned:

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