| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Dealloying of Post-Irradiated Model Ni20Cr (wt.%) alloy in Molten FLiNaK Salts |
| Author(s) |
Ho Lun Chan, Sean H. Mills, Matthew Chancey, Benjamin Derby, Harjot Singh, Elena Romanovskaia, Valentin Romanovski, Nathan Bieberdorf, Yongqiang Wang, Mark Asta, Andrew M. Minor, Peter Hosemann, John Scully |
| On-Site Speaker (Planned) |
Ho Lun Chan |
| Abstract Scope |
Alloys in contact with molten fluorides can corrode via a dealloying process. The less noble elements (LN) in the alloy are selectively dissolved as the salt infiltrates the alloy coupled with the more noble element (MN) undergoing surface diffusion to generate a porous structure. The conditions for dealloying are set by the salt chemistry, the corrosion potential controlled by a potentiostat or an oxidizer, and the alloy microstructure. However, a fundamental understanding of how these factors synergistically control corrosion remains incomplete. In this work, model Ni-Cr alloys between 5 and 20 wt% are subjected to heavy Ni ion radiations up to a peak damage of 2.2 μm and 60 dpa. Select alloys were then potentiostatically dealloyed in molten LiF-NaF-KF at 600oC at a potential in which only Cr dissolves. Insights on the radiation effect on the rate and parting limit of dealloying will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Nuclear Materials, High-Temperature Materials |