|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accident Tolerant Fuels for Light Water Reactor
||Crystallographic and Chemical Instabilities of MAX Phases during Proton Irradiation
||Joseph Henry Ward, Michael Preuss, Philipp Frankel, Phillip Withers, Simon Middleburgh, Michel Barsoum, Maxwell Rigby
|On-Site Speaker (Planned)
MAX phases have been suggested as candidate materials for ATFs and future reactor designs. The response of MAX phases to irradiating environments has been studied extensively, utilising a range of irradiating species, all leading to anisotropic crystallographic instabilities. Ti3SiC2 has been proton irradiated to 0.1 dpa to induce lattice strains for investigation into the fundamental mechanism causing the anisotropic response. X-ray diffraction has been correlated with density functional theory modelling to propose a point defect accumulation mechanism, which has further been investigated utilising advanced scanning transmission electron microscopy techniques. Identification of what defects remain in the MAX phase structure after irradiation are explored by electron energy loss spectroscopy, probing the change in ionisation energies of the elements caused by the defects predicted by modelling work. A systematic variable temperature irradiation study has also been conducted to understand at what temperatures MAX phases will be suitable to operate in irradiating environments.
||Planned: Supplemental Proceedings volume