| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Transport Properties of Binary and Entropy-stabilized Diborides |
| Author(s) |
Alin B. Niraula, Bikash Timalsina, Gregory E Hilmas, William G Fahrenholtz, Ridwan Sakidja |
| On-Site Speaker (Planned) |
Alin B. Niraula |
| Abstract Scope |
Structural diborides like ZrB2 and HfB2 and their entropy-stabilized variants MB2 (M= transition metals) are of great interest for high temperature structural applications due to their high melting point, excellent mechanical strength, high electrical and thermal conductivity and chemical inertness. In this study, we utilized the Density functional theory (DFT) calculation to predict the electron-phonon interactions which include relaxation times, electrical conductivity, and transport properties of binary and entropy-stabilized diborides. Both low temperature behavior of the thermal conductivity mainly due to the phonons and high temperature ones dominated by the electron contributions can be observed. In addition, we systematically evaluated the effect of additives such as Ta and Cr on the thermal properties of the diborides and compared them with the experimental results. The support from the Advanced Manufacturing program from the CMMI Division of NSF (Award No. 1902069) is gratefully acknowledged. We also thank NERSC for the supercomputer support. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, High-Entropy Alloys, Other |