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 |
Relating Complexion Transitions to Abnormal Grain Growth Kinetics of Eu-doped MgAl2O4 |
| Author(s) |
Alicia Koenig, Thomas Koenig, Rashed Mia, Fahima Shaon, Martin Harmer, Christopher J. Marvel |
| On-Site Speaker (Planned) |
Christopher J. Marvel |
| Abstract Scope |
Grain boundary complexion transitions are proposed to cause abnormal grain growth in ceramics, and Eu-doped MgAl2O4 is a model system to investigate complexion-induced abnormal grain growth. This talk will review the effects of various post-sintering heat treatment complexion-related effects on the kinetics of abnormal grain growth, namely heating rates and annealing temperatures. A common theme will be charting the kinetics of abnormal grain growth using time-temperature-transformation (TTT) diagrams using both traditional experiments and Monte Carlo grain growth simulations. Atomic-resolution characterization methods are used to determine the atomic structure and composition of various complexion types, while Monte Carlo grain growth simulations are utilized to determine effects of complexion mobility differences, nucleation, and percolation. Upon the adoption of so-called complexion TTT diagrams, microstructure evolution can be mechanistically controlled whereby large grain microstructures, small grain microstructures, or microstructures with bi-modal grain size distributions can be tailored for specific applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Characterization, Modeling and Simulation |