Open AccessKinetics of rapid crystal growth: phase field theory versus atomistic simulations
Author(s) -
Peter Galenko,
A. Salhoumi,
Vladimir Ankudinov
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/529/1/012035
Subject(s) - supercooling , kinetics , crystal (programming language) , crystal growth , materials science , molecular dynamics , phase (matter) , growth velocity , thermodynamics , field (mathematics) , alloy , dynamics (music) , chemical physics , crystallography , condensed matter physics , chemistry , physics , classical mechanics , metallurgy , computational chemistry , mathematics , computer science , medicine , organic chemistry , pure mathematics , programming language , endocrinology , acoustics
Kinetics of crystal growth in undercooled melts is analyzed by methods of theoretical modeling. Special attention is paid to rapid growth regimes occurring at deep undercoolings at which non-linearity in crystal velocity appears. A traveling wave solution of the phase field model (PFM) derived from the fast transitions theory is used for a quantitative description of the crystal growth kinetics. The “velocity – undercooling” relationship predicted by the traveling wave solution is compared with the data of molecular dynamics simulation (MDS) which were obtained for the crystal-liquid interfaces growing in the 〈 100〉-direction in the Ni 50 Al 50 alloy melt.