| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Unraveling Impurity-Dependent Morphological Evolution of Ni−20Cr Alloy in Eutectic LiCl−KCl Molten Salt Using In Situ Transmission X-ray Microscopy |
| Author(s) |
Yuxiang Peng, Xiaoyang Liu, Ellie Kim, Phillip Halstenberg, Ankita Mohanty, Xiaohui Xiao, James F. Wishart, Sheng Dai, Mingyuan Ge, Yu-chen Karen Chen-Wiegart |
| On-Site Speaker (Planned) |
Yuxiang Peng |
| Abstract Scope |
Impurities such as oxygen and water significantly impact corrosion behavior, increasing reaction rates at salt-metal interfaces. We examined the three-dimensional morphological evolution of Ni–20Cr in molten LiCl–KCl eutectic at high temperatures under various atmospheres using in situ synchrotron X-ray nano-tomography. Notably, Ni–20Cr exhibited substantial corrosion when exposed to air containing 4 mol% H2O and 21 mol% O2. Additionally, moderate corrosion was observed under conditions with ~ 1% water content. However, when Ni–20Cr was subjected to vacuum with trace amounts of argon, no detectable morphological evolution was observed. We directly visualized and quantified the 3D morphological changes in these different conditions. We further complemented our findings with spectroscopic imaging to analyze the local chemical states and reaction products resulting from these reactions. This work is part of the Molten Salts in Extreme Environments EFRC, funded by the U.S. Department of Energy, Office of Science. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Nuclear Materials, Energy Conversion and Storage |