About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Ceramic Materials for Nuclear Energy System
|
| Presentation Title |
Swift Heavy Ions to Study Amorphization Behavior of Compositionally Complex Oxides |
| Author(s) |
Kenneth Sanders, George Adamson, Cale Overstreet, Eric O'Quinn, Tao Liang, Haixuan Xu, Pascal Simon, Jesse Smith, Joerg Neuefeind, Joshua Safin, Katharine Page, David Sprouster, Maik Lang |
| On-Site Speaker (Planned) |
Kenneth Sanders |
| Abstract Scope |
Compositionally complex ceramics with multiple cations offer desirable properties for nuclear energy technologies. For instance, recent studies have focused on exploring their performance in harsh environments (e.g., intense irradiation, extreme pressures, high temperatures) for potential applications such as nuclear waste forms. The response of a range of compositionally complex pyrochlore oxides to highly ionizing radiation was assessed using highly energetic heavy ions from the GSI Helmholtz Centre and synchrotron-based X-ray characterization at the Advanced Photon Source and National Synchrotron Light Source-II, neutron total scattering at the Spallation Neutron Source, and Raman spectroscopy. The amorphization behavior of the compositionally complex pyrochlores was comparable to that of conventional endmembers, exhibiting a similar short-range ordering within the non-crystalline phase. Trends in radiation response were linked to cation variance and cation antisite defect energy, yielding insight into the influence of compositional complexity on performance under the extremes expected from operating conditions. |