About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Presentation Title |
Defect Kinetics and Radiation Induced Segregation in High-Entropy Carbides |
| Author(s) |
Muhammad Waqas Qureshi, Shuguang Wei, Izabela Szlufarska |
| On-Site Speaker (Planned) |
Muhammad Waqas Qureshi |
| Abstract Scope |
Carbide- and boride-based high-entropy ceramics are promising candidates for nuclear and high-temperature applications. Unlike in high-entropy alloys, the role of defect kinetics in the radiation response of high-entropy carbides (HEC) remains unexplored. Here, we develop machine learning interatomic potentials to investigate how anion and cation properties impact defect recovery. We found that defect recovery is controlled by interstitial diffusion, which strongly depends on the cation size mismatch, with larger atoms displacing the smaller ones from their lattice sites and thereby facilitating defect migration. We also found that the defect kinetics are influenced by the presence of short-range order. Finally, we will show a combination of experimental and simulation results that demonstrate the existence of radiation-induced segregation in HEC and explain how it emerges for defect kinetics. These findings provide fundamental insights into the defect evolution in HEC, offering a pathway for designing radiation-resistance materials. |
| Proceedings Inclusion? |
Undecided |