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. © 2015 Chinese Physical Society
| Translated title of the contribution | Investigation of atom-attaching process of three-dimensional body-center-cubic dendritic growth by phase-field crystal model |
|---|---|
| Original language | Chinese (Simplified) |
| Article number | 028102 |
| Journal | 物理学报 |
| Volume | 64 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 20 Jan 2015 |
| Externally published | Yes |
Research Keywords
- 晶体相场模型
- 枝晶形貌
- 晶体生长
- 界面各向异性
- Phase-field crystal model
- Dendritic morphology
- Crystal growth
- Interface anisotropy
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