3D Morphology and Formation Process of the Icosahedral Quasicrystalline Phase in Rapidly Solidified Al-Mn Alloy

作     者：Hui-Jun Kang Zhong-Lue Hu Xiao-Xia Gao Zong-Ning Chen Yi-Ping Lu Jin-Chuan Jie Jing-Jie Guo 

作者机构：Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province)School of Materials Science and EngineeringDalian University of Technology Department of Mechanical EngineeringTexas Tech University School of Materials Science and EngineeringHarbin Institute of Technology 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2016年第29卷第1期

页      面：28-31页

核心收录：

学科分类：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：financially supported by the National Natural Science Foundation of China(Nos.51274054, U1332115,51401044) the Keygrant Project of Chinese Ministry of Education(No.313011) the Science and Technology Planning Project of Dalian(No.2013A16GX110) the China Postdoctoral Science Foundation(No.2015T80248) 

主　　题：Rapid solidification Microstructure Icosahedral quasicrystal Aluminum-manganese alloy 

摘      要：Three-dimensional morphology and formation process of icosahedral quasicrystal phase have been investigated in a melt-spun AI-18Mn alloy （in wt%）. Three distinct layers corresponding to varying temperature gradient have been observed on the cross section of the ribbons. 3D morphologies of cellular and dendritic icosahedral phase have been obtained through electro-etching. A model has been proposed to describe the formation process of the icosahedral phase and a-A1 during the rapid solidification. The icosahedral phases are primarily precipitated from the melt into fine cellular and dendritic particles, and subsequently engulfed by the a-A1 which propagates in a planar morphology.