| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ceramic Materials for Nuclear Energy Research and Applications
|
| Presentation Title |
Comprehensive Treatment of Thermal Transport Under Irradiation in ThO2 |
| Author(s) |
David H. Hurley, Marat Khafizov, Cody Dennett, Amey Khanolkar, Zilong Hua, Lingfeng He, Jian Gan, Anter ElAzab, Maneieha Salaken, Chao Jiang, Miaomiao Jin, Ryan Deskins, Bawane Kausubh, Chris Marianettii, Matthew Mann |
| On-Site Speaker (Planned) |
David H. Hurley |
| Abstract Scope |
We report on a thermal transport study of thorium dioxide exposed to proton irradiation. This comprehensive treatment includes molecular dynamic modeling coupled with cluster dynamics to understand defect evolution. Models of defect evolution are compared/validated by transmission electron microscopy, Raman spectroscopy, ellipsometry, and x-ray diffraction measurements. Thermal transport properties of the thin damage layer are measured using modulated thermal reflectance and compared directly to a Boltzmann transport model of phonon mediated thermal transport in the presence of defects. The Boltzmann transport as well as the molecular dynamic and cluster dynamic models are informed from first principles models of defect formation and migration energies, phonon scattering cross-sections and phonon dispersion and lifetime in perfect, defect free materials. This comprehensive treatment of thermal transport demonstrates the level of detail made possible by combining elements of condensed matter physics, irradiation materials science, and mesoscale thermal transport studies. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Computational Materials Science & Engineering, |