Investigation of atom-attaching process of three-dimensional body-center-cubic dendritic growth by phase-field crystal model

Can Guo, Jin Cheng Wang, Zhi Jun Wang, Jun Jie Li, Yao Lin Guo, Sai Tang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

On the basis of the Gaussian kernel phase field crystal model (PFC), we propose a modified PFC model. The atomattaching process of three-dimensional body-center-cubic (BCC) dendritic growth is examined by using the modified PFC model. Our simulations indicate that in the process of the morphology evolution from regular dodecahedron to dendrite shape, the nucleation position of new layer is transferred from the center of {110} planes into the region of {110} plane near the <100> tips, and then the BCC dendritic morphology is obtained. In the process of dendritic growth, first, new solid atom absorption takes place near dendrite tips, then liquid atoms start to grow up on the existing solid phase rapidly. After the dendrite tips are completely occupied by new atoms, new nuclei begin to form again. Increasing the initial atom density n will increase the velocity coefficient C and the anisotropy of C.

Original languageEnglish
Article number028102
JournalWuli Xuebao/Acta Physica Sinica
Volume64
Issue number2
DOIs
StatePublished - 20 Jan 2015

Keywords

  • Crystal growth
  • Dendritic morphology
  • Interface anisotropy
  • Phase-field crystal model

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