| Monte Carlo simulation of the dynamic evolution ofbinary lamellar eutectic in directional solidification |
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| 引用本文： | 王伟民,牛玉超,陈俊华,边秀房,刘俊明.Monte Carlo simulation of the dynamic evolution ofbinary lamellar eutectic in directional solidification[J].中国物理 B,2004,13(9):1520-1525. |
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| 作者姓名： | 王伟民 牛玉超 陈俊华 边秀房 刘俊明 |
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| 作者单位： | (1)Key Laboratory of Liquid Structure and Heredity of Materials, Shandong University, Jinan 250061, China; (2)Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant Nos 50231040 and 50301008). |
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| 摘 要： | The dynamic evolution of the lamellar eutectic of binary alloys in directional solidification is studied in detail using the Monte Carlo technique. The simulated results can be summarized into two aspects: ({1}) the lamellar spacing λ is found to be inversely proportional to the chemical potential difference Δμ, predicting a linear relationship between the kinetic supercooling ΔT_k and total supercooling at the solid/liquid (S/L) interface; (2) as the solidifying velocity R is low, the dynamic product λ^{2}R shows a considerable dependence on temperature gradient G_T in the liquid in front of the S/L interface, although this dependence becomes much weaker at a high R.
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| 关 键 词： | 蒙特卡罗模拟 共晶体 凝固作用 二元合金 合金分析 |
| 收稿时间： | 2004-01-31 |
Monte Carlo simulation of the dynamic evolution of binary lamellar eutectic in directional solidification |
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| Wang Wei-Min,Niu Yu-Chao,Chen Jun-Hu,Bian Xiu-Fang and Liu Jun-Ming.Monte Carlo simulation of the dynamic evolution of binary lamellar eutectic in directional solidification[J].Chinese Physics B,2004,13(9):1520-1525. |
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| Authors: | Wang Wei-Min Niu Yu-Chao Chen Jun-Hu Bian Xiu-Fang and Liu Jun-Ming |
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| Institution: | Key Laboratory of Liquid Structure and Heredity of Materials, Shandong University, Jinan 250061, China; Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| Abstract: | The dynamic evolution of the lamellar eutectic of binary alloys in directional solidification is studied in detail using the Monte Carlo technique. The simulated results can be summarized into two aspects: ({1}) the lamellar spacing λ is found to be inversely proportional to the chemical potential difference Δμ, predicting a linear relationship between the kinetic supercooling ΔT_k and total supercooling at the solid/liquid (S/L) interface; (2) as the solidifying velocity R is low, the dynamic product λ^{2}R shows a considerable dependence on temperature gradient G_T in the liquid in front of the S/L interface, although this dependence becomes much weaker at a high R. |
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| Keywords: | eutectic solidification Monte Carlo method |
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