|About this Abstract
||MS&T21: Materials Science & Technology
||Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
||Characterizing the Spatial and Temporal Evolution of Iron Thin Films during Coupled Irradiation and Corrosion
||Benjamin Kyle Derby, Trevor Clark, Junsoo Han, Khalid Hattar, John Scully, Matthew Janish, Cortney Kreller, Nan Li
|On-Site Speaker (Planned)
||Benjamin Kyle Derby
This work describes a novel technique for the in situ characterization of an Fe sample exposed to ion irradiation in a corrosive salt medium. A thick, epitaxial Fe sample grown by physical vapor deposition was exposed to a 0.0001 M HCl + 0.1 M NaCl + H2O (pH = 4.0) salt solution for 90 minutes while simultaneously being irradiated by a 6 MeV Al3+ ion beam. The ion beam damage profile was centered at the liquid-solid interface. SEM images of the sample surface at 300 second intervals reveal the coupling nature of the irradiation and corrosion process. Intergranular voids from Fe leaching into the salt were enhanced by the heavy-ion irradiation. As such, a coupling effect was observed and the corrosion process was accelerated. Post-mortem TEM characterization and ex-situ EIS of the sample allow us to reason these observations with a physical model.