About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
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| Presentation Title |
A First-Principles Kinetics Model for Directional Growth and Stability of High-Entropy Oxide Nanoribbons |
| Author(s) |
Sara Kadkhodaei, Hessam Shahbazi, Pardis Seraji, Husam Farraj, Taimin Yang, Allen Kim, Seyyedfaridoddin Fattahpour, Ilias Papailias, Matthew Diamond, Shahriar Namvar, Alireza Ahmadiparidari, Shuxi Wang, Zhenxian Liu, Shihui Feng, Khagesh Kumar, Muhtar Ahart, Jordi Cabana, Sara Kadkhodaei, Junlan Wang, Zhehao Huang, Russell J. Hemley, Amin Salehi-Khojin |
| On-Site Speaker (Planned) |
Sara Kadkhodaei |
| Abstract Scope |
High-entropy oxides (HEOs), composed of multiple cations in near-equiatomic ratios, have emerged as promising materials due to their configurational entropy, driven phase stability and tunable properties. In a collaborative study, we report the synthesis and characterization of one-dimensional HEO nanoribbons (1D-HEO) synthesized via a template-assisted route using layered metal sulfide flakes, enabling controlled growth for the formation of uniform nanoribbons. These 1D-HEO structures exhibit resilience even in the harshest environments: temperatures up to 1,000°C, pressures up to 12 GPa, and prolonged exposure to strong acids and bases for up to 7 days.
To understand the mechanism underlying the 1D growth, I present a first-principles kinetics-driven Wulff construction model, which incorporates surface energy (SE) and attachment energy (AE) as descriptors for facet stability and growth dynamics, to predict crystallite morphology and anisotropic growth behavior. Predictions are corroborated by experimental characterization confirming the directional growth and uniformity of the 1D-HEO nanoribbons. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Phase Transformations |