| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Reversible Disorder Transformation of Fe3O4 under Ion Irradiation Evidence by In-situ TEM |
| Author(s) |
Angelica Lopez Morales, Djamel Kaoumi |
| On-Site Speaker (Planned) |
Djamel Kaoumi |
| Abstract Scope |
This work reports the ion-irradiation effects in Fe3O4 irradiated in-situ in a TEM with 1 MeV Kr ions at 50 K up to a maximum dose of 38 dpa. Evidence of the Verwey transition during the cooling process in some of the magnetite grains is presented. In addition, extinction of first-order reflection was observed at doses as low as 1 dpa. Upon natural warm-up of the sample from 50 K to room temperature, total recovery of the Fe3O4 structure was evidenced. The formation of a metastable crystalline phase related to the disordering and displacement of the cation lattice during ion irradiation of Fe3O4 at the cryogenic temperature is proposed to explain the results. The Order-Disorder-Order and self-annealing processes involved will be discussed and compared with the literature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Nuclear Materials, Ceramics |