| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2024 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-79: Temperature Effects on Dealloying Behavior of Binary Ni-20Cr Alloy in Molten FLiNaK |
| Author(s) |
Harjot Singh, Ho Lun Chan, Elena Romanovskaia, Valentin Romanovski, John Scully |
| On-Site Speaker (Planned) |
Harjot Singh |
| Abstract Scope |
In high-temperature Gen IV molten salt reactors (MSRs), the operational integrity heavily relies on structural materials. Understanding of corrosion and irradiation induced corrosion susceptibilities are of great interest. FLiNaK, a eutectic LiF-NaF-KF blend, is a leading coolant choice and any structural materials employed must withstand the MSR cooling loop’s primary operating temperature range of 600–700 °C. Prior studies on Ni-Cr and Fe-Cr in molten chlorides have identified temperature-dependent corrosion phenomena, including uniform corrosion, grain boundary attack, and bicontinuous dealloying. However, these phenomena, although expected, have not been explored in molten fluorides considering homologous temperature effects. This study investigated the corrosion behavior of a model binary Ni-20Cr (wt. %) alloy in unpurified molten FLiNaK salt ranging in temperature between 500 and 700°C under a constant electrochemical potential. Post-test surface and cross-sectional characterization were conducted via scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Nuclear Materials, High-Temperature Materials, Other |