About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Advances in Refractory High Entropy Alloys and Ceramics
|
| Presentation Title |
Thermal conductivity of high entropy ceramics before and after irradiation |
| Author(s) |
Zilong Hua, Kaustubh Bawane, Linu Malakkal, Lanh Trinh, Janak Tiwari, Xin Chen, Luke Wadle, Bai Cui, Yongfeng Lu, Yanwen Zhang |
| On-Site Speaker (Planned) |
Zilong Hua |
| Abstract Scope |
This talk presents an experimental investigation into the thermal conductivity of high entropy carbides (HEC) and borides (HEB) across a range of compositions. Thermal conductivity demonstrates a material's ability to transport thermal energy and is a critical physical property particularly in the energy industry. The disordered cation sublattice inherent to high entropy ceramics is expected to suppress thermal conductivity relative to simpler compositional counterparts, yet experimental data on this phenomenon remain scarce.
Using laser-based spatial- and frequency-domain thermoreflectance techniques, we measured the thermal conductivity of HECs and HEBs over a temperature range of 77-773K before and after irradiation. The high spatial resolution of this approach also enables measurements on ion-irradiated HEC samples with damage layers as thin as 1 µm. Together, these results offer valuable insight into how composition and manufacturing process influence the performance of HECs and HEBs, including their behavior in extreme environments such as nuclear reactors. |