| Al—Si共晶强制性非稳态生长实验研究 |
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| 引用本文： | 刘俊明,周尧和,商宝禄.Al—Si共晶强制性非稳态生长实验研究[J].金属学报,1989,25(6):102-107. |
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| 作者姓名： | 刘俊明 周尧和 商宝禄 |
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| 作者单位： | 西北工业大学
(刘俊明，周尧和)，西北工业大学(商宝禄) |
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| 摘 要： | 本文在定向凝固系统上用变速抽拉方法试验研究了Al-Si共晶强制非稳态生长过程。在加速生长过程中,共晶相间距对生长速度的响应呈滞后效应,响应机制是共晶Si相成簇分枝和局域“终结”延伸。在减速生长过程中,Si相成簇分枝和“终结”伸缩机制仍控制相间距;共晶相间距由初始生长速度决定,对生长速度下降不产生响应。
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| 关 键 词： | Al－Si 非稳态 生长 Si相 共晶 |
| 收稿时间： | 1989-06-18 |
| 修稿时间： | 1989-06-18 |
NONSTABLE GROWTH OF Al-Si EUTECTIC IN CONSTRAINED CONDITION |
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| LIU Junming,ZHOU Yaohe,SHANG Baolu Northwestern Polytechnical University,Xi''''an.NONSTABLE GROWTH OF Al-Si EUTECTIC IN CONSTRAINED CONDITION[J].Acta Metallurgica Sinica,1989,25(6):102-107. |
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| Authors: | LIU Junming ZHOU Yaohe SHANG Baolu Northwestern Polytechnical University Xi'an |
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| Abstract: | Nonstable growth of Al-Si eutectic in constrained condition has beeninvestigated by means of change of the pulling velocity in an unidirectional solidi-fication system. In constant acceleration growth, a retard effect of response of eu-tectic interflake spacing on the growth rate has been observed. However, in cons-tant deceleration growth, the interflake spacing is determined by the initial growthrate and does not response to the decreasing of growth rate. |
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| Keywords: | Al-Si eutectic nonstable growth Si-phase c1uster-branching |
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