About this Abstract |
| Meeting |
MS&T25: 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, Xin Chen, Luke Wadle, Bai Cui, Yongfeng Yu, Lingfeng He |
| On-Site Speaker (Planned) |
Zilong Hua |
| Abstract Scope |
In this talk, we will present the experimental investigation of thermal conductivity of high entropy carbides (HEC) and borides (HEB) with different compositions. Thermal conductivity determines the capability of a material to transport thermal energy and is considered as one critical physical property, especially in the energy industry. Due to the presences of disordered cation sublattice, it is expected that thermal conductivity of high entropy ceramics is lower than the counterparts with simpler compositions, but the experimental studies are relatively few. Using laser-based spatial-domain and frequency-domain thermoreflectance technique, we measured thermal conductivity of HECs and HEBs in a temperature range from 77K to 773K. The high spatial resolution enables measurements on ion-irradiated HECs with the damage layer of 1µm. These investigations can provide valuable information to predict the performances of HECs and HEBs with different compositions and from different manufacturing processes, and in the extreme environments such as nuclear reactors. |