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首页> 外文期刊>Materials Chemistry and Physics >High resolution transmission electron microscopy study on the development of nanostructured precipitates in Al-Cu obtained by mechanical alloying
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High resolution transmission electron microscopy study on the development of nanostructured precipitates in Al-Cu obtained by mechanical alloying

机译：机械合金化获得的Al-Cu纳米结构析出物的高分辨率透射电子显微镜研究

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Aluminum alloy 2014 is used to obtain nanostructured powders via mechanical alloying. The evolution of the diffusion processes is observed by the development of defect structures and nanoprecipitates after 10 h of milling. The characterization includes analytical and high resolution transmission electron microscopy. Dislocations associated with different Al/Cu ratio affect the material. These defects act as nucleation sites where precipitates of the εAl_2Cu_3 hexagonal phase have been identified. Moire fringes show the interference of {111}_(Al) with{1 0-1 0}_(εAl_2Cu_3) glide planes and locally small shifts of 1/3 {1 1 1}_(Al) and 1/3{1 0 -10}_(εAl_2Cu_3). Changes in the Al/Cu ratio lead to the formation of other solid solutions identified in the Cu rich area and could correspond to transition phases.
机译：铝合金2014用于通过机械合金化获得纳米结构粉末。研磨10小时后，通过缺陷结构和纳米沉淀的发展观察到扩散过程的发展。表征包括分析和高分辨率透射电子显微镜。与不同的铝/铜比相关的位错会影响材料。这些缺陷充当成核位点，已在其中鉴定出εAl_2Cu_3六方相的沉淀。莫尔条纹显示{111} _（Al）对{1 0-1 0} _（εAl_2Cu_3）滑行平面的干扰以及1/3 {1 1 1} _（Al）和1/3 {1 0 -10} _（εAl_2Cu_3）。 Al / Cu比的变化会导致在富Cu区域中形成其他固溶体，并且可能与过渡相相对应。

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