|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Frontiers in Solidification Science and Engineering
||Nucleation Modes in a Hydrodynamic Phase-field Crystal Model of Solidification
||Laszlo Granasy, Podmaniczky Frigyes, Gyula I. Tóth
|On-Site Speaker (Planned)
Nucleation of solid phases is investigated in undercooled/compressed liquids using a hydrodynamic phase-field theory of freezing working on the molecular scale [1,2]. We address structural aspects of homogeneous and heterogeneous nucleation, including the role of amorphous precursor states, and growth front nucleation mechanisms that lead to the formation of new (differently oriented grains) at the solid-liquid front in highly undercooled/compressed systems close to the stability limit of the liquid. The predictions imply that even in simple liquids, amorphous precursor structures may assist crystal nucleation. It will be shown furthermore that two mechanisms (i) misfit dislocations due to stress in the crystal that grows far from equilibrium and (ii) the interference of density waves ahead of the crystallization front are responsible for the formation new orientations.
 G.I. Tóth et al. J. Phys.: Condens. Matter. 26, 055001 (2014).
 F. Podmaniczky et al. Phys. Rev. E. 95, 052801 (2017).
||Planned: Supplemental Proceedings volume