| Mg-Gd-Y-Zn合金中长周期堆垛结构形成的原位准动态背散射电子显微研究 |
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| 引用本文： | 刘林林,孙威,王飞,张泽.Mg-Gd-Y-Zn合金中长周期堆垛结构形成的原位准动态背散射电子显微研究[J].电子显微学报,2008,27(4). |
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| 作者姓名： | 刘林林 孙威 王飞 张泽 |
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| 作者单位： | 北京工业大学固体微结构与性能研究所,北京,100124 |
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| 摘 要： | 本文利用原住准动态背散射电子显微像(BSE)并结合透射电镜观察研究了MgGd1.8 Y0.8Znx(at.%)(x=0.12,0.8,1.3)合金中长周期堆垛结构(LPS)的形成及生长形态.结果表明,当Zn含量较少时(x=0.12),铸态和各种热处理状态的合金中都未形成LPS.而在Zn含量相对较多的铸态合金(x=0.8,1.3)中,发现6层周期LPS的形成,而且Zn含量越多,LPS的体积分数越大.在300℃进行热处理时,LPS可以沿Mg基体{0001}面生长,原位准动态BSE观察可以直接揭示与LPS的生长相关的形貌变化.
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| 关 键 词： | 准动态观察 Mg-Gd-Y-Zn合金 长周期堆垛结构 背散射电子像 |
Formation of long period stacking structures in Mg-Gd-Y-Zn alloy studied by in-situ quasi-dynamic back-scattering electron microscopy |
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| LIU Lin-lin,SUN Wei,WANG Fei,ZHANG Ze.Formation of long period stacking structures in Mg-Gd-Y-Zn alloy studied by in-situ quasi-dynamic back-scattering electron microscopy[J].Journal of Chinese Electron Microscopy Society,2008,27(4). |
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| Authors: | LIU Lin-lin SUN Wei WANG Fei ZHANG Ze |
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| Institution: | LIU Lin-lin,SUN Wei~*,WANG Fei,ZHANG Ze(The Institute of microstructure , Property of Advanced Materials,Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | The formation and growth morphology of long period stacking (LPS) structures in MgGd_(1.8)Y_(0.8)Zn_x(at.%)(x=0.12,0.8,1.3) alloys have been investigated by combination of in-situ quasi-dynamic back-scattering electron microscopy(BSE) and transmission electron microscopy.The results show that no LPS can be formed in as-cast and heat treated MgGd_(1.8)Y_(0.8)Zn_x alloys when Zn-content is low(x=0.12).In contrast,a kind of 6-layered LPS has been found to form in as-cast MgGd_(1.8)Y_(0.8)Zn_x alloys with high ... |
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| Keywords: | in-situ quasi-dynamic observation Mg-Gd-Y-Zn alloy long period stacking structure back-scattering electron image |
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