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| 凝固速率对Si-Ta合金固液界面稳定性的影响 | |
| 引用本文： | 崔春娟,张军,吴昆,邹德宁,刘林,傅恒志.凝固速率对Si-Ta合金固液界面稳定性的影响[J].材料工程,2012(8):60-64. |
| 作者姓名： | 崔春娟 张军 吴昆 邹德宁 刘林 傅恒志 |
| 作者单位： | 1. 西安建筑科技大学冶金工程学院,西安710055;西北工业大学凝固技术国家重点实验室,西安710072 2. 西北工业大学凝固技术国家重点实验室,西安,710072 3. 西安建筑科技大学冶金工程学院,西安,710055 |
| 基金项目： | 国家自然科学基金资助项目，高等学校博士学科点专项科研基金新教师基金资助，陕西省自然科学专项研究基金资助，陕西省教育厅专项科研基金，西安建筑科技大学科技计划资助项目(人才科技基金RC0907) |
| 摘 要： | 以Si-Ta合金为研究对象,采用零功率法研究凝固速率对定向凝固固液界面稳定性的影响。结果表明:当凝固速率在0.3～9.0mm/min范围内,随着凝固速率的增大,固液界面经历了平界面→浅胞状界面→锯齿状界面→浅胞状界面→平界面的演化规律。在较低的凝固速率范围之内,实验结果与理论计算基本吻合。然而,在较高凝固速率时,实验结果与理论计算出现偏差,这是由于热力学和动力学均发生变化,使得在凝固速率V=5.0mm/min时固液界面就已经达到了稳定的平界面。 |
| 关 键 词： | 定向凝固 电子束悬浮区熔 凝固速率 固液界面 |
Influence of Solidification Rate on Solid-liquid Interface of Si-Ta Alloy |
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| CUI Chun-juan , ZHANG Jun , WU Kun , ZOU De-ning , LIU Lin , FU Heng-zhi.Influence of Solidification Rate on Solid-liquid Interface of Si-Ta Alloy[J].Journal of Materials Engineering,2012(8):60-64. | |
| Authors: | CUI Chun-juan ZHANG Jun WU Kun ZOU De-ning LIU Lin FU Heng-zhi |
| Affiliation: | 1 School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;2 State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China) |
| Abstract: | The influence of solidification rate on the solid-liquid interface of Si-Ta alloy was studied by the zero power method.The results show that the solid-liquid interface morphology has the following evolution processing: planar interface→shallow cell interface→cell interface→shallow cell interface→planar interface when the solidification rate varies from 0.3mm/min to 9.0mm/min.At the lower solidification rates,the experiment results can be consistent with Jackson-Hunt theory well.However,there is a deviation between the theory calculation and the experiment at the higher solidification rates.This is caused by the change of the thermodynamics and kinetics,and the solid-liquid interface can get to planar interface at the solidification rate V=5.0mm/min. |
| Keywords: | directional solidification electron beam floating zone melting solidification rate solid-liquid interface |
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