About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Advancing the Frontier of Powder Materials Processing and Sintering: A MPMD/EPD Symposium in Honor of Eugene Olevsky
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| Presentation Title |
A Grain Growth Study of Flash Sintering of 8mol% Yttria-Stabilized Zirconia at 850oC |
| Author(s) |
Colin Delaney, Sky Soltero, Thomas Grippi, Runjian Jiang, Elisa Torresani, Eugene Olevsky, Wenwu Xu |
| On-Site Speaker (Planned) |
Sky Soltero |
| Abstract Scope |
Flash Sintering (FS), first reported by Cologna et al. in 2010, is an innovative materials processing method offering efficient pathways for synthesizing oxide ceramics, crucial for applications like Solid Oxide Fuel Cells and high-temperature coatings. This study investigates grain growth in 8 mol% Yttria-Stabilized Zirconia samples Flash Sintered at 850°C under varied sintering time up to 600s. Thermoelectric analyses estimate grain boundary temperatures between 1375°C and 1425°C. Grain morphology and orientation, characterized by Scanning Electron Microscopy, informed the development of a grain growth rate model at an isothermal sintering temperature of approximately 1675 K. Observations reveal significant anisotropic grain growth near the anode and heterogeneous grain growth across samples, attributed primarily to thermoelectric and thermochemical effects. Comparing FS experiments in atmosphere and in vacuum, we concluded that oxygen presence critically influences flash initiation, while electrochemical and electrothermal phenomena significantly affect grain growth patterns, enhancing our understanding of FS’s practical application. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, Process Technology, Characterization |