Growth of different faces in a body centered cubic lattice: A case of the phase-field-crystal modeling

Abstract

Interface energy and kinetic coefficient of crystal growth strongly depend on the face of the crystalline lattice. To investigate the kinetic anisotropy and velocity of different crystallographic faces we use the hyperbolic (modified) phase field crystal model which takes into account relaxation of atomic density (as a slow thermodynamic variable) and atomic flux (as a fast thermodynamic variable). Such model covers slow and rapid regimes of interfaces propagation at small and large driving forces during solidification. In example of BCC crystal lattice invading the homogeneous liquid, dynamical regimes of crystalline front propagating along the selected crystallographic directions are studied. The obtained velocity and the velocity sequences for different faces are compared with known results. © 2020 Elsevier B.V.