| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
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Methods, Techniques, and Materials Discovery of Irradiation Effect Using In-situ Microscopy
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| Presentation Title |
Discovering the Mechanisms of Helium Channel Evolution Via In-situ Annealing and Observation in TEM |
| Author(s) |
Digvijay Yadav, Ryan Schoell, Eric J Lang, Benjamin K Derby, Jon Kevin Baldwin, Nan Li, Khalid Hattar, Michael J Demkowicz, Kelvin Y Xie |
| On-Site Speaker (Planned) |
Digvijay Yadav |
| Abstract Scope |
We investigate the mechanism of helium (He) channel formation and coarsening in a vanadium-copper-vanadium (V-Cu-V) tri-layer under in-situ He implantation in the in-situ ion irradiation TEM (I3TEM) facility at Sandia National Laboratory. The implantation parameters are chosen such that most of the He is trapped in the Cu layer. The nanometer-scale thickness of this layer confines the growth of He bubbles, forcing them to interact and interconnect into high aspect ratio channels. Our study resolves this process as a function of time. Moreover, by performing electron microscopy under in situ annealing, we also investigate the transformation of He-filled channels into coarser, pancake-shaped cavities. The implications of our work for understanding He behavior in nanocomposite metals are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Thin Films and Interfaces, Nuclear Materials |