About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXV
|
| Presentation Title |
Mesoscale Insights into Crack and Phase Transformation Coupling in Cubic Li7La3Zr2O12 |
| Author(s) |
Longsheng Feng, Bo Wang, Suyue Yuan, Kwangnam Kim, Liwen F. Wan, Brandon C. Wood, Tae Wook Heo |
| On-Site Speaker (Planned) |
Longsheng Feng |
| Abstract Scope |
Phase transformations in brittle oxides play a critical role in accommodating deformation and controlling failure, yet their interactions with cracks remain poorly understood beyond a few canonical systems such as ZrO₂. Several oxides, including Li₇La₃Zr₂O₁₂ (LLZO), have emerged as promising components in solid-state batteries; however, their degradation poses significant challenges to the development and deployment of advanced energy storage systems. In this study, we investigate the coupled behavior between cubic-to-tetragonal phase transformation and static cracks in LLZO using phase-field simulations. Our results reveal a pronounced asymmetry in the interaction between phase transformation and cracks under hydrostatic tension versus compression. Notably, in contrast to the classical transformation toughening observed in ZrO₂, we observe transformation softening in LLZO. Furthermore, the formation of the tetragonal phase is found to reduce ionic conductivity, underscoring important functional consequences. These findings could provide new insights for the design of crack-tolerant functional oxides for energy applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Modeling and Simulation, Phase Transformations |