| 机械合金化AlCuFe经退火形成准晶体的结构变化 |
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| 引用本文： | 卞清,王晓,张明,李媛媛,徐云玲.机械合金化AlCuFe经退火形成准晶体的结构变化[J].解放军理工大学学报,2011,0(5):507-511. |
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| 作者姓名： | 卞清 王晓 张明 李媛媛 徐云玲 |
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| 作者单位： | 1.解放军理工大学 理学院, 江苏 南京 211101； 2.中国科学技术大学 国家同步辐射实验室, 安徽 合肥 230029； 3.河海大学 理学院，江苏 南京 210098 |
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| 基金项目： | 教育部创新计划同步辐射研究生创新基金资助(20090152S). |
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| 摘 要： | 为了研究AlCuFe准晶体的形成机理,采用了X射线衍射(XRD)和扩展X射线吸收精细结构(EXAFS)2种分析技术,有效地克服了高度无序体系结构分析的困难.研究结果表明,在球磨过程中Cu原子进入Al的晶格点阵,经过不同球磨时间分别形成金属间化合物Al2 Cu或者Cu9 Al4,而Fe原子保持原来的体心立方(bcc) α...
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| 关 键 词： | X射线衍射 X射线吸收精细结构 机械合金化 |
| 收稿时间： | 2009-12-20 |
| 修稿时间： | 2009-12-20． |
Structural evolution in annealing of mechanically alloyed AlCuFe icosahedral quasicrystal |
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| BIAN Qing,WANG Xiao,ZHANG Ming,LI Yuan-yuan and XU Yun-ling.Structural evolution in annealing of mechanically alloyed AlCuFe icosahedral quasicrystal[J].Journal of PLA University of Science and Technology(Natural Science Edition),2011,0(5):507-511. |
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| Authors: | BIAN Qing WANG Xiao ZHANG Ming LI Yuan-yuan and XU Yun-ling |
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| Institution: | 1.College of Science, PLA Univ. of Sci. &; Tech., Nanjing 211101, China; 2.National Synchrotron Radiation Laboratory, Univ. of Sci. &; Tech. of China, Hefei 230029, China； 3.College of Science, Hohai Univ. Nanjing 210098, China. |
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| Abstract: | To study the mechanism of AlCuFe quasicrystalline (QC) formation, the x ray diffraction (XRD) and x ray absorption fine structure (XAFS) were adopted. The combination of both the methods successfully overcame the difficulties in the analysis of the highly disordered structures. The results indicate that during the milling process, only Cu can incorporate into the lattice of Al to form an Al2Cu or Cu9Al4, which depends on the milling times. Fe remains the original structure of bcc α Fe. However, annealing can drive the α Fe to react with Al and Al Cu compounds. The main products are Al7Cu2Fe compound or Al(Cu, Fe) solid solution, respectively. Then at higher temperature the Al7Cu2Fe transforms into the icosahedral Al65Cu20Fe15 quasicrystal. |
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| Keywords: | XRD XAFS mechanical alloying |
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