About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Self-organizing Nano-architectured Materials
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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, |