›› 2014, Vol. 23 ›› Issue (11): 110204-110204.doi: 10.1088/1674-1056/23/11/110204

• GENERAL • 上一篇    下一篇

Dynamic investigation of the finite dissolution of silicon particles in aluminum melt with a lower dissolution limit

董曦曦a b, 何良菊a c, 弭光宝a, 李培杰a b d   

  1. a National Center of Novel Materials for International Research, Tsinghua University, Beijing 100084, China;
    b Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
    c School of Aerospace, Tsinghua University, Beijing 100084, China;
    d State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
  • 收稿日期:2014-03-18 修回日期:2014-06-05 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB632203).

Dynamic investigation of the finite dissolution of silicon particles in aluminum melt with a lower dissolution limit

Dong Xi-Xi (董曦曦)a b, He Liang-Ju (何良菊)a c, Mi Guang-Bao (弭光宝)a, Li Pei-Jie (李培杰)a b d   

  1. a National Center of Novel Materials for International Research, Tsinghua University, Beijing 100084, China;
    b Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
    c School of Aerospace, Tsinghua University, Beijing 100084, China;
    d State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
  • Received:2014-03-18 Revised:2014-06-05 Online:2014-11-15 Published:2014-11-15
  • Contact: Dong Xi-Xi E-mail:dongxx09@mails.tsinghua.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB632203).

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摘要： The finite dissolution model of silicon particles in the aluminum melt is built and calculated by the finite difference method, and the lower dissolution limit of silicon particles in the aluminum melt is proposed and verified by experiments, which could be the origin of microinhomogeneity in aluminum-silicon melts. When the effects of curvature and interface reaction on dissolution are not considered; the dissolution rate first decreases and later increases with time. When the effects of curvature and interface reaction on dissolution are considered, the dissolution rate first decreases and later increases when the interface reaction coefficient (k) is larger than 10-1, and the dissolution rate first decreases and later tends to be constant when k is smaller than 10-3. The dissolution is controlled by both diffusion and interface reaction when k is larger than 10-3, while the dissolution is controlled only by the interface reaction when k is smaller than 10-4.

关键词: silicon particle, aluminum melt, lower dissolution limit, finite dissolution model

Abstract: The finite dissolution model of silicon particles in the aluminum melt is built and calculated by the finite difference method, and the lower dissolution limit of silicon particles in the aluminum melt is proposed and verified by experiments, which could be the origin of microinhomogeneity in aluminum-silicon melts. When the effects of curvature and interface reaction on dissolution are not considered; the dissolution rate first decreases and later increases with time. When the effects of curvature and interface reaction on dissolution are considered, the dissolution rate first decreases and later increases when the interface reaction coefficient (k) is larger than 10-1, and the dissolution rate first decreases and later tends to be constant when k is smaller than 10-3. The dissolution is controlled by both diffusion and interface reaction when k is larger than 10-3, while the dissolution is controlled only by the interface reaction when k is smaller than 10-4.

Key words: silicon particle, aluminum melt, lower dissolution limit, finite dissolution model

中图分类号:  (Partial differential equations)

  • 02.30.Jr
02.70.Bf (Finite-difference methods) 03.65.Vf (Phases: geometric; dynamic or topological) 61.25.Mv (Liquid metals and alloys)