| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Elucidating Microstructural Evolution Under Extreme Environments
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| Presentation Title |
In-Situ TEM Study of Microstructural Evolution in Proton Irradiated Single Crystal UO<sub>2</sub> Under High-Temperature Annealing |
| Author(s) |
Kaustubh K. Bawane, Anshul Kamboj, Miaomiao Jin, Md Minaruzzaman, Mutaz Alshannaq, Karl Rickert, J. Matthew Mann, Fei Teng, Mason Childs, Lin Shao, David H Hurley, Yongfeng Zhang, Marat Khafizov, Boopathy Kombaiah |
| On-Site Speaker (Planned) |
Kaustubh K. Bawane |
| Abstract Scope |
Understanding microstructural changes in nuclear fuels under different irradiation conditions is important as it directly affects thermal, oxidation and mechanical properties and thereby reactor safety and longevity. This work focuses on the effect of temperature on the evolution of extended defects in uranium dioxide. In-situ transmission electron microscopy (TEM) annealing of proton irradiated UO<sub>2</sub> was performed at different temperatures: 900 °C, 1100 °C and 1300 °C, 1 hour for each temperature. Detailed characterization using TEM was performed to identify faulted loops, perfect dislocation loops, and voids. Dislocation loops showed migration, disappearance, coalescence and loop-line interactions which significantly contributed to the recovery process during annealing at temperatures of 1100 °C and 1300 °C. Small voids were observed at 900 °C and grew rapidly during 1300 °C annealing. The dislocation loop and voids behavior during in-situ TEM annealing were compared with rate theory and cluster dynamics prediction. |
| Proceedings Inclusion? |
Planned: |