| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
|
| Presentation Title |
Influence of Connectivities and Length Scales of Eutectic Alloys on Thermoelectric Properties |
| Author(s) |
Panithi Sireesha, Shriparna Mukherjee, Shanmukha Kiran Aramanda, Kamanio Chattopadhyay |
| On-Site Speaker (Planned) |
Shanmukha Kiran Aramanda |
| Abstract Scope |
Thermoelectric materials are usually designed by varying compositions. However, microstructural control provides an opportunity to fine-tune the properties. Eutectic solidification generates self-organized structures with different microstructural scales and can be used for producing complex thermoelectrics. In a comparative study, we have investigated two extreme cases of eutectic solidification: directional solidification and rapid quenching. For the directional solidification, we utilized Cu2Te-Sb2Te3 as a model system, while for the quenching technique, we used SnTe-Te. In the Cu2Te-Sb2Te3 system, lower growth condition led to a uniform microstructure (segregation-free), which exhibited a maximum PF (∼1.4 mW/m-K^2) and a higher zT of 0.29, while the higher growth conditions showed deteriorated properties due to cellular segregation. In the SnTe-Te system, higher growth conditions imparted through a higher cooling rate led to the formation of nano-lamellae features that improved PF (∼1.1 mW/m-K^2) and a higher zT of 0.45. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Composites, Energy Conversion and Storage |