| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIII
|
| Presentation Title |
Enhancing Thermoelectric Performance of Ta, Sb Added NbCoSn Half-Heusler with the Atomic-Scale Microstructure Analysis |
| Author(s) |
Donghyeon Chae, Pyuckpa Choi, Hail Park, Chanwon Jung |
| On-Site Speaker (Planned) |
Donghyeon Chae |
| Abstract Scope |
Since thermoelectric materials can convert industrial waste heat into electric power, recent research on various theromelectric materials has been conducted. Half-Heusler thermoelectric material is one of the promising materials due to its high Seebeck coefficient, mechanical robustness, and thermal stability, however, the figure of merit, ZT is low due to its relatively high thermal conductivity. The microstructure of thermoelectric materials has a significant effect on thermoelectric performance thus, microstructure analysis is an important factor to improve thermoelectric performance. We tried to improve the thermoelectric performance by adding Ta and Sb to the NbCoSn-based half-Heusler compound and reducing the grain size through a rapid solidification process. We observed that the lattice thermal conductivity calculated by Debye-Callaway model is different from the measured value. transmission electron microscope and atom probe tomography were conducted and the existence of the secondary phases was observed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, |