Shell phase selection and layer numbers of core–shell structure in monotectic alloys with stable miscibility gap
Shell phase selection and layer numbers of core–shell structure in monotectic alloys with stable miscibility gap
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DOI：
10.1016/j.jallcom.2012.05.116
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发表时间：
2012-10
影响因子：
6.2
通讯作者：
N. Wang;L. Zhang;Youping Zheng;W. Yao
中科院分区：
文献类型：
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作者：
N. Wang;L. Zhang;Youping Zheng;W. Yao
研究了具有稳定相容性间隙体系中壳相选择对核壳结构形成的影响，探讨了壳相选择和不同层结构的形成机理。结果表明，由于L2相的表面能比L1相低，壳相总是由L2相组成。这种表面/界面能依赖的壳相选择通过具有玻璃/聚四氟乙烯壁的SCN-H2O透明体系的相分离得到证实，玻璃/聚四氟乙烯壁对SCN和H2O具有不同的润湿能力。基于表面能相关的壳相选择，阐明了双层和三层核壳结构的形成机理。
Shell phase selection in the core–shell structure formation was investigated in the systems with stable miscibility gaps, and the shell phase selection and the formation mechanism of different layers structure are examined. It is found that the shell phase is always composed of L2 phase owing to its lower surface energy compared with that of L1 phase. This surface/interfacial energy dependent shell phase selection was confirmed by the phase separation of SCN–H2O transparent system with glass/Teflon wall which has different wetting ability to SCN and H2O. On the basis of the surface energy dependent shell phase selection, the formation mechanism of the double- and triple-layer core–shell structure is elucidated.