| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermal Property Characterization, Modeling, and Theory in Extreme Environments
|
| Presentation Title |
Thermal Conductivity Degradation from Irradiation-induced Microstructural Defects in Single Crystal Thorium Dioxide |
| Author(s) |
Amey Rajendra Khanolkar, Zilong Hua, Cody Andrew Dennett, Marat Khafizov, Tiankai Yao, Kaustubh Bawane, Lingfeng He, J. Matthew Mann, Anter El-Azab, Jian Gan, David Hurley |
| On-Site Speaker (Planned) |
Amey Rajendra Khanolkar |
| Abstract Scope |
A fundamental understanding of radiation effects on thermal transport is critical for the development of advanced nuclear fuels. In this talk, ion irradiation is used to seed atomic-to-nanoscale defects of controllable size and density in single crystal thorium dioxide (ThO2). The influence of these microstructural defects on the thermal properties of ThO2 is explored. Lattice defects are characterized using optical spectroscopy and transmission electron microscopy. Mesoscale measurements of thermal transport properties within the damaged region are performed using a laser-based modulated thermoreflectance technique. Measurements as a function of dose and temperature are analyzed using the classical Klemens-Callaway approach, to determine the impact of point and extended defect types on the thermal properties of ThO2. These results will provide further insight into the role of irradiation-induced defects in limiting phonon-mediated thermal transport in ceramics, and enable validation of model predictions based on the Boltzmann transport formalism |
| Proceedings Inclusion? |
Planned: |