|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Ceramic Materials for Nuclear Energy Research and Applications
||Radiation Tolerance of Nanoporous Gadolinium Titanate
||Nathan Madden, Matthew Janish, James Valdez, Blas Uberuaga, Jessica Krogstad
|On-Site Speaker (Planned)
Defect sinks are critical for improving a material’s radiation tolerance, needed to meet the demands of future nuclear applications. However, it has been demonstrated previously that not all defect sinks are equally effective. To determine the effectiveness of different defect sinks, grain boundaries and pores (i.e. free surfaces) are tested directly. A gadolinium titanate sample was created with three distinct regions in the same TEM lamella, each containing only one of the primary sinks of interest. The TEM lamella was irradiated using 1 MeV Kr in-situ irradiation within the TEM. Nanobeam electron diffraction was used after specific intervals of fluence to assess the crystallinity of each region. The results at room temperature and 600 C show that a free surface defect sink is more effective than grain boundaries at capturing radiation-induced defects. These results allow for a more informed microstructural design to meet the needs of future nuclear applications.
||Characterization, Ceramics, Nuclear Materials