| 树枝状沉淀相的形貌研究 |
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| 引用本文： | 孙扬善,冯珊,范赓伸.树枝状沉淀相的形貌研究[J].东南大学学报(自然科学版),1989(3). |
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| 作者姓名： | 孙扬善 冯珊 范赓伸 |
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| 作者单位： | 东南大学材料科学与工程系，东南大学材料科学与工程系，东南大学材料科学与工程系 轻工部电光源材料科学研究所 |
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| 摘 要： | 在铁铝黄铜中,Fe_3Al 沉淀呈立方形、花瓣状和树枝状三种形貌.TEM(透射电镜)观察分析表明,这三种形貌反映了沉淀相在粗化过程中的三个阶段.由于基体β′相和沉淀相的晶体结构十分相似,两者的点阵常数又正好是一倍之差,Fe_3Al 初析出时和基体共格.粗化过程中,沉淀颗粒沿<111>晶向生长,这导致了共格的失配和形貌的转化.
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| 关 键 词： | 形貌 沉淀 铝 铁/共格 结构 树枝状 |
Morphological Investigation of Dendritic Precipitates |
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| Sun Yangshan Feng Shan Fan Gengshen.Morphological Investigation of Dendritic Precipitates[J].Journal of Southeast University(Natural Science Edition),1989(3). |
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| Authors: | Sun Yangshan Feng Shan Fan Gengshen |
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| Institution: | Department of Material Science and Engineering |
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| Abstract: | Fe_3Al precipitates in iron-aluminium brasses show three morpholo- gies,cubic,rose-shaped and dendritic.TEM investigation indicates that these three morphologies reflects three stages of precipitate growth.As the crystal structure of the matrix and precipitates are very similar and the lattice para- meter of Fe_3Al is twice of that of the matrix,the initially formed Fe_3Al precipitates are coherent with the matrix.The growth of precipitates is along <111>direction during coarsening,which results in the change in morphology and the loss of coherency of the precipitates. |
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| Keywords: | morphology precipitates aluminium iron/coherency structure dendrtic |
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