| 定向凝固过程中的溶质径向分凝 |
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| 引用本文： | 刘晓华,郭喜平,介万奇,周尧和.定向凝固过程中的溶质径向分凝[J].材料研究学报,1998,12(2):123-127. |
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| 作者姓名： | 刘晓华 郭喜平 介万奇 周尧和 |
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| 作者单位： | 西北工业大学凝固技术国家重点实验室 |
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| 基金项目： | 国家自然科学基金!59672004 |
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| 摘 要： | 基于实际定向凝固系统的对称性,采用线性近似方法计算了柱坐标系中,扩散控制条件下二元合金定向凝固时微弯曲固液界面导致的溶质径向不均匀分布.
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| 关 键 词： | 定向凝固 弯曲固液界面 溶质径向分凝 晶体生长 |
| 收稿时间： | 1998-04-25 |
| 修稿时间： | 1998-04-25 |
RADIAL SOLUTE SEGREGATION DURING UNIDIRECTIONAL SOLIDIFICATION |
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| LIU Xiaohua,GUO Xiping,JIE Wanqi,ZHOU Yaohe.RADIAL SOLUTE SEGREGATION DURING UNIDIRECTIONAL SOLIDIFICATION[J].Chinese Journal of Materials Research,1998,12(2):123-127. |
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| Authors: | LIU Xiaohua GUO Xiping JIE Wanqi ZHOU Yaohe |
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| Affiliation: | LIU Xiaohua,GUO Xiping,JIE Wanqi,ZHOU Yaohe(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi 'an,China) |
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| Abstract: | Based on the symmetry of an actual unidirectional solidification system, the slightly curved liquid-solid interface related radial solute distribution inhomogeneity during difFusion-controlled steady-state unidirectional solidification of a binary alloy is calculated by means of linear approximation in a cylindrical coordinate system. The results show that the radial solute segregation is qualitatively proportional to the solute Peclet number. relative interface depth h. R-1 and (1-k). where k is the equilibrium solute partition coefficient. Also, it is slightly quantitatively smaller than Coriell et al's result gotten from the planar rectangular coordinate system. |
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| Keywords: | unidirectional solidification curved liquid-solid interface radial solute segregation |
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