| 定向凝固的界面形态转变SCIEI |
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| 引用本文： | 黄卫东,周尧和. 定向凝固的界面形态转变SCIEI[J]. 金属学报, 1991, 27(2): 8-13 |
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| 作者姓名： | 黄卫东 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，西北工业大学凝固技术国家重点实验室 讲师 西安(710072) |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用透明模型丁二腈—1.1％乙醇合金,从界面形态发展的时间相关性的角度,对平-胞转变和胞-枝转变进行了实验研究。实验结果表明,忽视界面形态发展的时间相关性,会导致过高估计平-胞转变速度和胞-枝转变速度。提出了一种确定平-胞转变条件的渐进线方法。确定了胞-枝转变速度随温度梯度变化的规律。
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| 关 键 词： | 凝固 界面形态 时间相关性 |
| 收稿时间： | 1991-02-18 |
| 修稿时间： | 1991-02-18 |
INTERFACE MORPHOLOGY TRANSITIONS DURING DIRECTIONAL SOLIDIFICATION IN A TRANSPARENT MODEL ALLOY |
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| HUANG Weidong,ZHOU Yaohe National Solidification Processing Laboratory,Northwestern Polytechnical University,Xi''''an. INTERFACE MORPHOLOGY TRANSITIONS DURING DIRECTIONAL SOLIDIFICATION IN A TRANSPARENT MODEL ALLOY[J]. Acta Metallurgica Sinica, 1991, 27(2): 8-13 |
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| Authors: | HUANG Weidong ZHOU Yaohe National Solidification Processing Laboratory Northwestern Polytechnical University Xi''''an |
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| Abstract: | Directional solidification experiments have been carried out on thestudies of transitions either from planar to cellular interface or from cellular todendritic one in a transparent model alloy, succinonitrile-1.1% ethanol, with theemphasis on the time-dependent development of interface morphology. The resultsshow that paying no enough attention to the time-dependent development of inter-face morphology will lead to evident overestimate of the solidification velocities atwhich the transitions of the planar-cellular and cellular-dendritic occur. A methodof finding the critical condition of interface instability by the asymptotic line ofV vs t_c curve is given from the experimental results. The effect of temperaturegradient on the cellular-dendritic transition rate has been determined. |
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| Keywords: | solidification interface morphology succinonitrile-ethanol model alloy |
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