| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Investigation of the Mechanism Behind Proton Irradiation Decelerated Corrosion in Molten Fluorides |
| Author(s) |
Weiyue Zhou, Yang Yang, Lingfeng He, Andrew Minor, Michael Short |
| On-Site Speaker (Planned) |
Weiyue Zhou |
| Abstract Scope |
Corrosion in molten fluoride salts proceeds mainly via selective dealloying of Cr from the alloys into the salts. For MSR application, it is important to understand how radiation damage influences this process. To accomplish this, a simultaneous proton irradiation/corrosion facility is constructed at MIT. By firing a high energy proton beam at the center of the sample, direct comparisons between corrosion with and without radiation can be made on one sample, with the proton irradiation as the only difference. Results of Ni-20Cr model alloys in molten fluorides show a deceleration of intergranular corrosion under the proton irradiation. Quantitative representation of the SEM cross-section results are performed to support the qualitative-evident conclusion and provides a deceleration factor related to the dose rate. The possible mechanism behind the observed phenomenon will be illustrated, focusing on the altered diffusion kinetics under the irradiation with TEM results supporting it. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |