| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Temperature Dependent Thermal-Mechanical Properties of Plasma-Facing Materials - W, SiC, and Fe-Cr Alloy |
| Author(s) |
Jie Peng, David Cerecedar |
| On-Site Speaker (Planned) |
Jie Peng |
| Abstract Scope |
In fusion energy reactors, the plasma-facing material (PFM) is the first line of defense protecting the divertor against extreme conditions such as heat flux, neutron irradiation, thermal gradients, and tritium retention. Thermal conductivity, elastic constants, and thermal expansion coefficients (TECs) are essential properties of these PFMs and can be significantly affected by temperature. In this study, we investigate temperature-dependent thermal-mechanical properties of PFMs including W, different sublattice of SiC, and different compositions of Fe-Cr. The quasi-harmonic approximation is combined with DFT calculations to determine the lattice structure of PFMs at different temperatures. The phonon spectrum and electronic band structure are analyzed to reveal the effect of temperature on thermal and electrical properties. The temperature-dependent TECs, elastic constants, and elastic modulus are calculated. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Nuclear Materials |