About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Special Topics in Nuclear Materials: Reproducibility and Uncertainty; Hydrogen Effects; Space and Microreactor Systems
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| Presentation Title |
Phase Stability and Hydrogen Diffusion in Irradiated Yttrium Hydride |
| Author(s) |
Ryan Pena, Eric Lang, Caitlin Kohnert, Darrell Shien-Lee Cheu, Khalid Hattar, Henry Osborne |
| On-Site Speaker (Planned) |
Ryan Pena |
| Abstract Scope |
Yttrium hydride is a potentially useful material as a microreactor moderator due to its high hydrogen concentration and desirable thermal properties. Despite these attributes, both radiation effects and hydrogen diffusion may pose challenges in reactor systems. This presentation will outline effects of ion irradiation, specifically Au3+ at elevated temperatures with a fluence of 2.33*10^15 , in YH1.6, YH1.8, and YH2 samples. For each sample, phase stability tests were used to determine how each sample was affected: XRD shows how much hydrogen is in the sample through the amount of YHx peaks and Y metal peaks, Raman spectroscopy shows YHx peaks shift from phase transformation from metal to hydride, and Vickers hardness tests show how different hydrogen contents directly relate to material properties. From these tests, non-destructive evaluation of hydrogen content directly correlating with irradiation fluence will be shown. Results will be compared to ongoing neutron irradiation studies of yttrium hydride. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Phase Transformations |