| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
Irradiation Damage Behavior in Novel High-entropy Carbide Ceramics |
| Author(s) |
Fei Wang, Xueliang Yan, Tianyao Wang, Lin Shao, Yaqiao Wu, Michael Nastasi, Bai Cui |
| On-Site Speaker (Planned) |
Bai Cui |
| Abstract Scope |
Novel high-entropy carbide ceramics, e.g., (Zr0.25Ta0.25Nb0.25Ti0.25)C, have been developed as a candidate material for high-temperature and irradiation extreme environments. X-ray diffraction suggests that it has a single-phase rock salt structure, in which the four metal elements likely share the cation position while the C element occupies the anion sublattice. The high-entropy carbide ceramic is thermally stable after annealing to up to 1700 ºC in Ar atmosphere without phase transformation or decomposition. Irradiation damage has been evaluated by conducting heavy ion irradiation experiments. Microstructure changes, including the phase transformation, radiation-induced segregation, irradiation defect clusters, and helium bubbles, have been characterized using transmission electron microscopy as a function of temperature and irradiation dose. (Zr0.25Ta0.25Nb0.25Ti0.25)C shows exceptional structural stability in ion irradiation (at least 20 dpa) environments at 25, 300 and 500 ºC. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |