|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Ceramic Materials for Nuclear Energy Research and Applications
|Comprehensive Characterization of Damage in Ion Irradiated Ceramics for Validation of Atomistic Models
|Marat Khafizov, Joshua Ferrigno, Erika Nosal, Saqeeb Adnan, Kaustubh K. Bawane, Amey Khanolkar, Miaomiao Jin, Linu Malakkal, Chao Jiang, Lingfeng He, David Hurley
|On-Site Speaker (Planned)
Validation of first principles models for microstructure evolution under irradiation has been hindered by availability of table-top experimental methods suitable for defect characterization at the atomic level. We discuss extensive characterization of defects in ion irradiated fluorite oxides including urania, thoria and ceria. Irradiations over a range of temperatures to a few dpa dose provide optimal conditions for producing both point and extended defects. Electron microscopy is used to characterize extended defects, while optical and Raman spectroscopies are used to characterize point defects. Quantitative analysis of dislocation loops evolution using rate theory model provides means for measuring mobility of defects. Raman and optical spectroscopies probe vibrational and electronic properties of defects all tightly coupled to atomic structure of the defect. Finally, thermal conductivity measurements are used as ultimate test. Presented methods offer an attractive solution for validation of atomistic models critical for development of material performance codes with predictive capability.
|Nuclear Materials, Ceramics, Characterization