| Al-Si共晶相间距对生长速度突变的响应 |
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| 引用本文： | 刘俊明,周尧和,商宝禄.Al-Si共晶相间距对生长速度突变的响应[J].材料研究学报,1992,6(2):115-120. |
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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： | 南京大学固体微结构物理国家实验室,西北工业大学,西北工业大学 南京市210008 |
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| 摘 要： | 实验考察了强制条件下 Al-Si 共晶相间距对生长速度突变的响应。实验表明这种响应是滞后和连续的,响应机制是共晶 Si 相的“成簇分枝”延伸和终止,响应过程由液相组分扩散和共晶相晶体学各向异性效应决定。实验证明了共晶稳态生长位置的唯一性。相应的理论分析引入一个描述共晶相晶体学各向异性效应的参量。计算结果同实验测量相吻合。
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| 关 键 词： | 共晶相间距 生长速度 Al-Si共晶 |
| 收稿时间： | 1992-04-25 |
| 修稿时间： | 1992-04-25 |
RESPONSE OF THE INTERLAMELLAR SPACING OF Al-SiEUTECTIC TO THE ABRUPT CHANGE OF GROWTH RATE |
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| LIU JunmingZHOU Yaohe,SHANG Baolu.RESPONSE OF THE INTERLAMELLAR SPACING OF Al-SiEUTECTIC TO THE ABRUPT CHANGE OF GROWTH RATE[J].Chinese Journal of Materials Research,1992,6(2):115-120. |
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| Authors: | LIU JunmingZHOU Yaohe SHANG Baolu |
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| Affiliation: | LIU Junming(Nanjing University)ZHOU Yaohe;SHANG Baolu(Northwestern Polytechnical University) |
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| Abstract: | Response of the interlamellar of Al-Si eutectic growing under constrained condi-tions to the abrupt change of growth rate has been studied both experimentally andtheoretically.The experiments show that the response is retarded and continuous.Mechanismsof the response are the so-called"cluster-branching"and extension-termination of the clustersof eutectic Si flakes.It is sugggested that the response depends on mass diffusion in liquid andcrystallography anisotropic effect of the solid phases.Uniqueness of steady-state selection ofthe spacing is verified experimentally.A parameter is introduced to characterize the anisotropiceffect.The theoretical analysis is supported from the measured results. |
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| Keywords: | interlamellar spacing growth rate Al-Si eutectic |
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