| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Powder and Ceramic Materials Science
|
| Presentation Title |
New Insights into Sintering Processing for Solid State Electrolytes – A Phase-Field Simulation Study
|
| Author(s) |
Rongpei Shi, Marissa Wood, Jose Ali Espitia, Xiaosi Gao, Joshua Hammons, LiWen Wan, Shin Young Kang, Dive Mukund, Kwangnam Kim, Tae Wook Heo, Brandon Wood, Jianchao Ye |
| On-Site Speaker (Planned) |
Rongpei Shi |
| Abstract Scope |
For all-solid-state batteries, the key properties of solid electrolytes (e.g., ionic conductivity, mechanical properties, and critical current density) are governed by microstructural features, such as internal porosity, grain size and orientation, formed during sintering processing. By using 3D phase-field simulation, we investigated multiple concurrent microstructural processes and their interplay during sintering, including surface coarsening, grain growth, and pore shrinkage. We analyzed quantitatively the individual and coupled effect of various mass transport mechanisms on microstructural evolution and kinetics as a function of interfacial (i.e., free surfaces and grain boundaries) properties and powder particle size and distribution. Dominant mechanisms are found to vary over the course of the process. The predicted dependence between densification kinetics and particle size agrees well with experimental observations. The proposed modeling approach allows for rapid discovery of optimum processing conditions, leading to desired microstructures of solid electrolytes with improved kinetics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Modeling and Simulation, ICME |