| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermal Transport in Crystalline and Non-crystalline Solids: Theory and Experiments
|
| Presentation Title |
Thermal Transport in Crystalline Solids with Irradiation-Induced Defects: Computational Modeling and Experiments |
| Author(s) |
Anter A. El-Azab |
| On-Site Speaker (Planned) |
Anter A. El-Azab |
| Abstract Scope |
We present a theory driven program for predicting thermal transport in irradiated crystalline solids, where computational models and experiments are combined to make progress. A Boltzmann Transport Equation (BTE) approach is used to model phonon transport and interactions at the mesoscale, with input consisting of phonon dispersion relations obtained by inelastic neutron scattering measurements and strain-based models for phonon scattering by lattice defects and microstructural features. Within a Monte Carlo solution scheme, point defects are represented as continuous fields that scatter phonons everywhere in the crystal while extended defects such as dislocation loops and voids are expressed as discrete strain sources that scatter phonons in a non-uniform fashion. Monte Carlos simulations of phonon transport in irradiated ThO2 are compared with Modulated Thermoreflectance measurements of conductivity in the same material. This work is performed as part of the EFRC Center for Thermal Energy Transport under Irradiation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |