About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIV
|
| Presentation Title |
Phase Diagrams Evaluation to Consider Partitioning and Site-Preference of Alloying and Doping Elements in Thermoelectric Intermetallic Compounds |
| Author(s) |
Yoshisato Kimura, Yixun Wang, Yonghoon Lee |
| On-Site Speaker (Planned) |
Yoshisato Kimura |
| Abstract Scope |
Multi-component phase diagrams should be established as a basis of thermoelectric material design in order to consider partitioning behavior and site-preference of additional alloying and doping elements. In the case of half-Heusler, such as ZrNiSn and TiNiSn having vacancy-site, not only substitution for three constitutional elements but also substitution for vacancy site is important. The latter is closely related to two-phase separation between half-Heusler and Heusler driven by the ordering of vacancy involving Ni and fourth element. In the case of β-FeSi2 which is formed by phase transition, i.e., peritectoid reaction from ε-FeSi and α-Fe2Si5 into β, and eutectoid decomposition of α into β and Si, partitioning of doping elements such as n-type Co and p-type Mn in each phase through phase transition is quite important. Since addition of alloying/doping element beyond solubility limit leads to coexistence of impurity phases, careful composition control is necessary for high thermoelectric performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Electronic Materials, Other, |