中国物理B ›› 2015, Vol. 24 ›› Issue (7): 78108-078108.doi: 10.1088/1674-1056/24/7/078108

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Effects of physical parameters on the cell-to-dendrite transition in directional solidification

魏雷, 林鑫, 王猛, 黄卫东   

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2014-10-31 修回日期:2015-01-27 出版日期:2015-07-05 发布日期:2015-07-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51271213 and 51323008), the National Basic Research Program of China (Grant No. 2011CB610402), the National High Technology Research and Development Program of China (Grant No. 2013AA031103), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20116102110016), and the China Postdoctoral Science Foundation (Grant No. 2013M540771).

Effects of physical parameters on the cell-to-dendrite transition in directional solidification

Wei Lei (魏雷), Lin Xin (林鑫), Wang Meng (王猛), Huang Wei-Dong (黄卫东)   

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2014-10-31 Revised:2015-01-27 Online:2015-07-05 Published:2015-07-05
  • Contact: Lin Xin E-mail:xlin@nwpu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51271213 and 51323008), the National Basic Research Program of China (Grant No. 2011CB610402), the National High Technology Research and Development Program of China (Grant No. 2013AA031103), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20116102110016), and the China Postdoctoral Science Foundation (Grant No. 2013M540771).

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摘要： A quantitative cellular automaton model is used to study the cell-to-dendrite transition (CDT) in directional solidification. We give a detailed description of the CDT by carefully examining the influence of the physical parameters, including: the Gibbs–Thomson coefficient Γ, the solute diffusivity Dl, the solute partition coefficient k0, and the liquidus slope ml. It is found that most of the parameters agree with the Kurz and Fisher (KF) criterion, except for k0. The intrinsic relations among the critical velocity Vcd, the cellular primary spacing λc, max, and the critical spacing λcd are investigated.

关键词: directional solidification, cell-to-dendrite transition, dendrite growth, cellular automaton

Abstract: A quantitative cellular automaton model is used to study the cell-to-dendrite transition (CDT) in directional solidification. We give a detailed description of the CDT by carefully examining the influence of the physical parameters, including: the Gibbs–Thomson coefficient Γ, the solute diffusivity Dl, the solute partition coefficient k0, and the liquidus slope ml. It is found that most of the parameters agree with the Kurz and Fisher (KF) criterion, except for k0. The intrinsic relations among the critical velocity Vcd, the cellular primary spacing λc, max, and the critical spacing λcd are investigated.

Key words: directional solidification, cell-to-dendrite transition, dendrite growth, cellular automaton

中图分类号:  (Phase diagrams and microstructures developed by solidification and solid-solid phase transformations)

  • 81.30.-t
68.70.+w (Whiskers and dendrites (growth, structure, and nonelectronic properties)) 81.30.Fb (Solidification) 81.10.Aj (Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)