中国物理B ›› 2014, Vol. 23 ›› Issue (3): 38104-038104.doi: 10.1088/1674-1056/23/3/038104

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

Dendrite to symmetry-broken dendrite transition in directional solidification of non-axially oriented crystals

邢辉a b, 王建元a b, 陈长乐a b, 金克新a b, 杜立飞b   

  1. a Shaanxi Key Laboratory for Condensed Matter Structure and Properties, Northwestern Polytechnical University, Xi’an 710129, China;
    b The Key Laboratory of Space Applied Physics and Chemistry, Northwestern Polytechnical University, Xi’an 710072, China
  • 收稿日期:2013-04-01 修回日期:2013-09-02 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61078057 and 51172183), the National Natural Science Foundation of Shaanxi Province, China (Grant No. 2012JQ8013), the Aviation Foundation of China (Grant No. 2011ZF53065), and the NPU Foundation for Fundamental Research, China (Grant Nos. NPU-FFR-JC20110273 and JC201155).

Dendrite to symmetry-broken dendrite transition in directional solidification of non-axially oriented crystals

Xing Hui (邢辉)a b, Wang Jian-Yuan (王建元)a b, Chen Chang-Le (陈长乐)a b, Jin Ke-Xin (金克新)a b, Du Li-Fei (杜立飞)b   

  1. a Shaanxi Key Laboratory for Condensed Matter Structure and Properties, Northwestern Polytechnical University, Xi’an 710129, China;
    b The Key Laboratory of Space Applied Physics and Chemistry, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2013-04-01 Revised:2013-09-02 Online:2014-03-15 Published:2014-03-15
  • Contact: Chen Chang-Le E-mail:chenchl@nwpu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61078057 and 51172183), the National Natural Science Foundation of Shaanxi Province, China (Grant No. 2012JQ8013), the Aviation Foundation of China (Grant No. 2011ZF53065), and the NPU Foundation for Fundamental Research, China (Grant Nos. NPU-FFR-JC20110273 and JC201155).

摘要: In this paper, the morphological transition from dendrite to symmetry-broken dendrite is investigated in the directional solidification of non-axially-oriented crystals using a quantitative phase-field model. The effects of pulling velocity and crystal orientation on the morphological transition are investigated. The results indicate the orientation dependence of the symmetry-broken double dendrites. A dendrite to symmetry-broken dendrite transition is found by varying the pulling velocity at different crystal orientations and the symmetry-broken multiple dendrites emerge as a transition state for the symmetry-broken double dendrites. The state region during the transition can be well characterized through the variations of the characteristic angle and the average primary dendritic spacing.

关键词: directional solidification, phase-field simulations, symmetry broken

Abstract: In this paper, the morphological transition from dendrite to symmetry-broken dendrite is investigated in the directional solidification of non-axially-oriented crystals using a quantitative phase-field model. The effects of pulling velocity and crystal orientation on the morphological transition are investigated. The results indicate the orientation dependence of the symmetry-broken double dendrites. A dendrite to symmetry-broken dendrite transition is found by varying the pulling velocity at different crystal orientations and the symmetry-broken multiple dendrites emerge as a transition state for the symmetry-broken double dendrites. The state region during the transition can be well characterized through the variations of the characteristic angle and the average primary dendritic spacing.

Key words: directional solidification, phase-field simulations, symmetry broken

中图分类号:  (Solidification)

  • 81.30.Fb
68.70.+w (Whiskers and dendrites (growth, structure, and nonelectronic properties))