| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
|
| Presentation Title |
Helium Implantation Responses of Co-deposited Copper-tungsten Nanocomposites |
| Author(s) |
Kelvin Yu Xuan Xie, Digvijay Yadav, Michael Demkowicz |
| On-Site Speaker (Planned) |
Kelvin Yu Xuan Xie |
| Abstract Scope |
In this study, we investigate microstructure and helium (He) implantation responses in copper (Cu)-tungsten (W) nanocomposites fabricated by co-deposition at 400, 600, and 800 °C. Neutron reflectometry analysis (NRA) reveals that the He retention in the nanocomposites is ~25% lower than those in single-phase pure Cu and W. Despite the microstructural differences, the He retention is similar among all nanocomposites. We employed scanning electron microscopy (SEM), precession electron diffraction (PED), and high-magnification transmission electron microscopy (TEM) to observe and quantify the differences in the number density of grain boundaries and phase boundaries of all three nanocomposites. The microstructural feature is then correlated with the He bubble size and density. Our observations suggest that nano-grain boundaries and phase boundaries may play a similar role in He retention in the co-deposited Cu-W nanocomposites. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Characterization, Nuclear Materials |