| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Modeling Nucleation in the Phase-field and Phase-field Crystal Models |
| Author(s) |
Tamás Pusztai, Frigyes Podmaniczky, Gyula Tóth, László Gránásy |
| On-Site Speaker (Planned) |
Tamás Pusztai |
| Abstract Scope |
Solidification of an undercooled melt starts with the appearance of small solid particles that can grow further, a process called nucleation. Nucleation is initiated by the thermal fluctuations present in the melt. Modeling nucleation is a challenging task, because of its stochastic nature, the extremely small time and length scales involved, and its sensitivity on the process and model parameters, to name a few difficulties. Using the traditional phase-field and atomistic phase-field crystal models I introduce the techniques to describe nucleation by these methods and I show examples of simple and complex nucleation mechanisms, such as homogeneous, heterogeneous and athermal nucleation, phase selection via competing nucleation, amorphous precursor assisted nucleation of the crystalline phase, and the formation of orientational defects in the growing crystal via growth front nucleation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |