中国物理B ›› 2007, Vol. 16 ›› Issue (3): 805-811.doi: 10.1088/1009-1963/16/3/041

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Investigation on stability of directionally solidified CBr4--C2Cl6 lamellar eutectic by using multiphase field simulation

朱耀产, 王锦程, 杨根仓, 赵达文   

  1. State Key Laboratory of Solidification Processing,Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2006-01-06 修回日期:2006-12-19 出版日期:2007-03-20 发布日期:2007-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No~50271057).

Investigation on stability of directionally solidified CBr4--C2Cl6 lamellar eutectic by using multiphase field simulation

Zhu Yao-Chan(朱耀产)† , Wang Jin-Cheng(王锦程), Yang Gen-Cang(杨根仓), and Zhao Da-Wen(赵达文)   

  1. State Key Laboratory of Solidification Processing,Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2006-01-06 Revised:2006-12-19 Online:2007-03-20 Published:2007-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No~50271057).

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摘要： With the multiphase field method, the stability of lamellar basic state is investigated during the directional solidification of eutectic alloy CBr4--C2Cl6. A great number of lamellar patterns observed in experiments are simulated, and a stability diagram for lamellar pattern selections is presented. The simulated growth behaviours of these patterns are found to be qualitatively consistent with Karma \textit{et al}'s numerical calculations and experimental results. The formation of the primary instability is attributed to the destabilization of solute boundary layer.

关键词: multiphase field, directional solidification, morphological instability, stability diagram

Abstract: With the multiphase field method, the stability of lamellar basic state is investigated during the directional solidification of eutectic alloy CBr4--C2Cl6. A great number of lamellar patterns observed in experiments are simulated, and a stability diagram for lamellar pattern selections is presented. The simulated growth behaviours of these patterns are found to be qualitatively consistent with Karma et al's numerical calculations and experimental results. The formation of the primary instability is attributed to the destabilization of solute boundary layer.

Key words: multiphase field, directional solidification, morphological instability, stability diagram

中图分类号:  (Solid-liquid transitions)

  • 64.70.D-
81.30.Bx (Phase diagrams of metals, alloys, and oxides) 81.30.Fb (Solidification)