  In this work, phase diagrams of a modified two-mode phase-field crystal (PFC)
that show two-dimensional (2D) and three-dimensional (3D) crystallographic
structures were determined by utilizing a free energy minimization method. In
this study the modified two-mode PFC model (presented by E. Asadi and M. Asle
Zaeem, Comput. Mater. Sci. 2015) was used, in which the free energy can be
exactly minimized in each stable crystal structure allowing calculation of
accurate phase diagrams for two-mode PFC models. Different crystal structures,
such as square, triangle, body-centered cubic (bcc), face-centered cubic (fcc),
and stripe lattice structures as well as their coexistence regions were
considered in the calculations. The model parameters were discussed to
calculate phase diagrams that can be used as a guideline by other researchers
for studying solidification and solid state phase transformation using two-mode
PFC model.

Materials Science