| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Electron and Phonon Thermal Conductivity in High Entropy Carbides with Variable Carbon Content |
| Author(s) |
Patrick E. Hopkins, Christina Rost, Trent Borman, Mohammad Delower Hossain, Mina Lim, Kathleen F. Quiambao-Tomko, John A. Tomko, Donald W. Brenner, Jon-Paul Maria |
| On-Site Speaker (Planned) |
Patrick E. Hopkins |
| Abstract Scope |
The extreme level of chemical tunability make high entropy carbides (HECs) a significant materials platform for a variety of fundamental studies and functional applications. We investigate the thermal conductivity of high entropy carbide thin films as carbon stoichiometry is varied. The thermal conductivity of the HEC decreases with an increase in carbon stoichiometry, while the respective phonon contribution scales with elastic modulus changes as the excess carbon content increases. Based on the carbon content, the HECs transition from an electrically conducting metal-like material with primarily metallic bonding to a primarily covalently bonded crystal with thermal conductivities largely dominated by the phononic sub-system. Our results demonstrate the ability to tune the thermal functionality of high entropy materials through stoichiometries that dictate the type of bonding environment. |
| Proceedings Inclusion? |
Planned: |