| 相场模型模拟强界面能各向异性作用下晶体生长 |
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| 引用本文： | 赵达文,李秋书,郝维新.相场模型模拟强界面能各向异性作用下晶体生长[J].铸造技术,2011,32(3). |
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| 作者姓名： | 赵达文 李秋书 郝维新 |
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| 作者单位： | 太原科技大学材料学院,山西,太原,030024 |
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| 基金项目： | 太原科技大学博士科研启动基金资助项目 |
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| 摘 要： | 用Eggleston等提出的方案对界面能各向异性函数进行重整化处理,并使用相场模型对强各向异性情形下的晶体生长进行了模拟.在晶体平衡形态模拟中再现了晶向缺失现象,并与理论预测结果相一致.在自由枝晶生长过程中,当各向异性低于临界值时.枝晶生长速度随着各向异性系数增大而增大;在临界值附近生长速度突然降低5%;当高于临界值时生长速度又开始增加直到在0.20处达到最大值,其后基本不变.
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| 关 键 词： | 各向异性 晶体生长 相场模型 |
Phase-field Method Simulation of the Crystal Growth with Strongly Surface Tension Anisotropy |
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| ZHAO Da-wen,LI Qiu-shu,HAO Wei-xin.Phase-field Method Simulation of the Crystal Growth with Strongly Surface Tension Anisotropy[J].Foundry Technology,2011,32(3). |
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| Authors: | ZHAO Da-wen LI Qiu-shu HAO Wei-xin |
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| Affiliation: | ZHAO Da-wen,LI Qiu-shu,HAO Wei-xin(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China) |
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| Abstract: | The crystal growth morphology and behavior in strongly surface-tension anisotropy circumstance is investigated numerically using the phase-field method in two dimensions.In order to describe the strongly surface tension anisotropy in solid-liquid interface,the anisotropy function is regularized with Eggleston et al.proposed formula.In the equilibrium crystal shape simulation the phenomena of orientation missing have been quantitatively reproduced.During the free dendrite growth procedure,as the anisotropy b... |
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| Keywords: | Anisotropy Crystal growth Phase-field model |
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