| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
The Driving Force for Grain Boundary Migration in Polycrystals |
| Author(s) |
Gregory S. Rohrer |
| On-Site Speaker (Planned) |
Gregory S. Rohrer |
| Abstract Scope |
Recent studies of grain boundaries in polycrystalline Ni, SrTiO3, and Fe have shown no correlation between curvature and migration velocity, contradicting the observed migration behavior of individual grain boundaries in bicrystals. Here we propose a driving force that arises from grain boundary energy anisotropy and, more specifically, the anisotropy associated with the grain boundary plane inclination. Application of this driving force leads to the prediction that the area expansion of a given grain boundary is correlated to the difference in the energies of the grain boundaries that meet at a triple line. Experimental evidence, derived from the time evolution of three-dimensional polycrystalline microstructures measured by diffraction microscopy, is consistent with this prediction. Furthermore, the data show that grain boundaries migrate in such a way as to replace higher energy grain boundaries with relatively lower energy boundaries.
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| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Characterization, |