About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications X
|
Presentation Title |
Advancing the Thermoelectric Performance
of Full Heusler Alloys |
Author(s) |
Ernst Bauer, Fabian Garmroudi, Matthias Knopf, Alexander Riss, Michael Parzer, Takao Mori |
On-Site Speaker (Planned) |
Ernst Bauer |
Abstract Scope |
XYZ (half-Heusler) and X2YZ (full-Heusler) ternaries form extended families of materials, with a large variety of ground states, hence, with numerous prospects for technical applications. Here, X and Y are transition metal elements and Z is a main group element. Both of these families crystallise in a cubic structure with the prototypic LiAlSi-structure (C1b-type) for the former and the Cu2MnAl-strucutre (L21-type) for the latter.
The present work aims to demonstrate how appropriate co-substitutions in the full-Heusler system Fe2VAl dramatically enhances the thermoelectric performance, arriving at thermoelectric power factors (PF > 10 mW/m·K2 [1]), exceeding best performing Bi2Te3-based systems by a factor of 2 to 3 around room temperature. Here, experimental data will be analysed by DFT results, and by appropriate phenomenological models in order to trace the evolution of physical features.
[1] F. Garmroudi et al., PRB, 103, 085202 (2021)
Research supported by JST, project MIRAI. |
Proceedings Inclusion? |
Planned: |
Keywords |
Electronic Materials, Modeling and Simulation, Energy Conversion and Storage |