About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Self-organizing Nano-architectured Materials
|
| Presentation Title |
Persistence of Crystal Orientations across Sub-micron-scale “Super-grains” in Self-organized Cu-W Nanocomposites |
| Author(s) |
Kelvin Yu Xuan Xie, Digvijay Yadav, Dexin Zhao, Arun Devaraj, Michael Demkowicz |
| On-Site Speaker (Planned) |
Digvijay Yadav |
| Abstract Scope |
We use precession electron diffraction to investigate the crystallographic character of copper (Cu)-tungsten (W) nanocomposites fabricated via physical vapor co-deposition at 400 °C. We observe sub-micron-scale regions, where apparently disconnected Cu and W grains have near-identical crystallographic orientations. This persistence of grain orientations suggests Cu and W grains within these regions are interconnected in 3-D when they first form and may be considered as intercalated, sub-micron-scale “super-grains”. Indeed, atom probe tomography provides direct evidence of 3-D interconnectivity of W domains. Our findings shed light on the structure and self-organization mechanisms of nanocomposites formed by spontaneous phase separation of co-deposited metals. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Characterization, Thin Films and Interfaces, |