About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Kinetics and Mechanisms Under External Forcing-Driven Conditions
|
| Presentation Title |
Irradiation-driven high pressure-like defect structure evolution in ceramics. |
| Author(s) |
Arya Chatterjee, Janelle P Wharry |
| On-Site Speaker (Planned) |
Arya Chatterjee |
| Abstract Scope |
This study presents potential mechanisms for unusual ion irradiation-induced microstructures and defects in oxide ceramics, which can be likened to pressure-induced phase changes. Both irradiation and high pressure are extreme stimuli known to generate a wide range of unique defects in materials, but parallels between these stimuli have not yet been drawn. For this investigation, single crystal anatase TiO2 and BaZrO3 were subjected to Kr+ ion irradiation at room temperature. Irradiation transforms all specimens into multi-layered structures comprised of crystalline and amorphous domains with varying thickness depending on irradiation dose rate. Crystalline domains exhibit two key defect structures similar to features observed in similar materials under high pressure. First, anti-phase boundaries (APB) nucleate at the interface between amorphous and crystalline layers. Second, modulated microstructures form in crystalline islands surrounded by amorphous domains. These results will be discussed in the context of kinetic driving forces between irradiation and high pressure extremes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Phase Transformations, Nuclear Materials |