About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Physical Properties of Accumulative Roll Bonded Cu/Nb Nanolamellar Composites |
Author(s) |
Jared Justice, Aidana Bauyrzhan, Marat Khafizov, Nathan Mara, Filip Ronning, Osman Anderoglu |
On-Site Speaker (Planned) |
Jared Justice |
Abstract Scope |
Nanolamellar composites with high interface density have increased strength due to interfaces serving as barriers to dislocation movement and high radiation damage resistance. These interfaces also serve as barriers to electron motion, reducing the electrical resistivity and thermal conductivity. This work seeks to understand the inherent tradeoff between strength and physical properties of nanolamellar composites produced by accumulative roll bonding. Specimens with layer thickness ranging from 25 nm to 193 nm were studied. The electrical resistivity was investigated over temperatures ranging from 0 K to 300 K. The effect of longitudinal rolling and cross rolling was also investigated. Electrical resistivity results were then compared with two models for resistivity of thin-films: the Fuchs-Sondheimer and the Mayadas-Shatzkes models. The thermal conductivity of the specimens was evaluated using modulated thermoreflectance. Findings showed that while resistivity increased with decreasing layer height, thermal conductivity was only weakly dependent on layer height. |
Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Thin Films and Interfaces, |