Icosahedral quasicrystalline phase in an as-cast Mg-Zn-Er alloy

作     者：LI Jianhui DU Wenbo LI Shubo WANG Zhaohui LI Jianhui, DU Wenbo, LI Shubo, and WANG Zhaohui School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

作者机构：School of Materials Science and Engineering Beijing University of Technology Beijing 100124 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2009年第28卷第3期

页      面：297-301页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Major Fundamental Research Program of China (No. 2007CB613706) 

主　　题：magnesium alloy microstructure quasicrystal erbium 

摘      要：The microstructure of an as-cast Mg-Zn-Er alloy was investigated through scanning electron microscopy （SEM） and transmission electron microscopy （TEM） equipped with energy dispersive spectroscopy （EDS）. The results indicate that two different second phases, one with eutectoid-lamellar morphology and the other with granular shape, distribute in the α-Mg matrix. The coexistence of the face-centered icosahedral quasicrystalline phase （I-phase） and W-phase with the face-centered cubic structure is found in the as-cast alloy. The coexistence of I-phase and W-phase in the Mg-Zn-Er alloy is because the W-phase is the primary phase and the I-phase forms by peritectic reaction during solidification.