Relationship between solid/liquid interface and crystal orientation for pure magnesium solidified in fashion of cellular crystal

The relationship between the solid/liquid interface and the crystal orientation for pure magnesium, which grows in fashion of cellular crystal in unidirectional solidification, was investigated. The results show that the energy of the solid/liquid interface is the lowest during cellular crystal growth of pure magnesium; and the solid/liquid interface is covered by the basal face {0001} and by the crystal face made up of three atoms located at the orientation {0001}< 0100 > and two atoms located at the inner of magnesium crystal cell. The strongest bond is formed in the direction of 61.9 degrees deviating from the growth direction, and the second strong bond is formed in the directions of 8.5 degrees and 47.7 degrees, respectively, deviating from the growth direction. The angle between the basal face {0001} and the growth direction is 61.9 degrees. The theoretical analysis results are basically consistent with the experimental results from SUSUMU et al.