| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Complex Structure of Molten NaCl-CrCl2 and NaCl-CrCl3: Cr-Cl Octahedra Network and Intermediate-range Order |
| Author(s) |
Boris Khaykovich, Qing-Jie Li, David Sprouster, Guiqiu (Tony) Zheng, Joerg Neuefeind, Alex Braatz, Joanna McFarlane, Stephen Tsz Tang Lam, Daniel Olds, Matthew Marshall, Ju Li |
| On-Site Speaker (Planned) |
Boris Khaykovich |
| Abstract Scope |
As molten-salt nuclear reactors operate, chemical compositions and physical properties of salts change because of fission and corrosion. Since Cr is the most important corrosion product, we present detailed studies of the molten NaCl:CrCl3 and NaCl:CrCl2 by neutron and X-ray diffraction and spectroscopy. Although the corrosion results in small amounts of Cr in the melt, we used high Cr concentration to measure the structure around Cr ions with high fidelity. We found networks of Cr-Cl octahedra and an intermediate-range order with non-monotonic temperature behavior, and remarkable agreement between experiments and ab initio simulations. The availability of Cr isotopes with very different neutron-scattering properties makes them ideal ions to model local structures in molten salts containing multi-valent cations. Also, I will present the progress towards simultaneous electrochemical and X-ray absorption spectroscopies. These results will influence every molten-salt application where corrosion-born Cr impurities appear, including nuclear and solar energy. |
| Proceedings Inclusion? |
Planned: |