| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Mechanistic Understanding of 3D Morphological Evolution of Metals in Molten Salts
by In Situ X-ray Nano-tomography |
| Author(s) |
Xiaoyang Liu, Arthur Ronne, Lin-Chieh Yu, Mingyuan Ge, Lingfeng He, Phillip Halstenberg, Cheng-Hung Lin, Bobby Layne, Sheng Dai, Wah-Keat Lee, Shannon M. Mahurin, James F. Wishart, Xianghui Xiao, Yu-chen Karen Chen-Wiegart |
| On-Site Speaker (Planned) |
Yu-chen Karen Chen-Wiegart |
| Abstract Scope |
The work discusses underlying morphological evolution mechanisms of corrosion in molten salts. We investigated the 3D morphological evolution of Ni-Cr alloy in molten KCl-MgCl2 at 500-800 °C. The corrosion of the alloys was visualized and quantified via in situ X-ray nano-tomography at the National Synchrotron Light Source II. At lower temperatures, the progression of corrosion is consistent with intergranular attack; at higher temperatures, corrosion forms a characteristic bicontinuous structure, similar to those formed by dealloying for functional applications. Electron microscopy offers further insight into the chemistry and detailed microstructure. The results indicate a mechanistic transition from intergranular corrosion to percolation dealloying as the temperature increases, shedding light on the competing mechanisms responsible for morphological evolution in molten salt corrosion. This work was supported as part of the Molten Salts in Extreme Environments (MSEE) Energy Frontier Research Center, funded by the U.S. Department of Energy Office of Science. |
| Proceedings Inclusion? |
Planned: |