| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
H-20: Multimodal Characterization of the Morphological and Chemical Evolution of Ni and Ni-20Cr Microwires in Purified Molten KCl:MgCl2 |
| Author(s) |
Arthur H. Ronne, Yi Xie, Phillip Halstenberg, Mingyuan Ge, Xianghui Xiao, Yachun Wang, Wah-Keat Lee, Lingfeng He, Shannon Mark Mahurin, Yu-Chen Karen Chen-Wiegart |
| On-Site Speaker (Planned) |
Arthur H. Ronne |
| Abstract Scope |
Molten salt reactors aim to provide more efficient, safer energy with less radiological waste. However, corrosion is a key challenge and the precise governing mechanism and kinetics are not fully understood. This study analyzes the fundamental mechanisms of corrosion for Ni and Ni-Cr alloys in purified KCl:MgCl2, focusing on the metal-salt interface. The multimodal approach of utilizing both X-ray nano-tomography and scanning transmission electron microscopy with energy dispersive X-ray spectroscopy in a complimentary fashion allows three-dimensional morphology and chemical composition to be thoroughly interrogated. The corroded Ni microwire forms bamboo-like structures, likely from corrosion along interfaces and grain boundaries. The Ni-Cr microwires show accelerated corrosion analogous to a dealloying mechanism. These results help to further knowledge of molten salt and alloy interactions.
This work was supported as part of the Molten Salts in Extreme Environments Energy Frontier Research Center, funded by the U.S. Department of Energy Office of Science. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |