接金川

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教授

博士生导师

硕士生导师

性别:男

毕业院校:哈尔滨工业大学

学位:博士

所在单位:材料科学与工程学院

学科:材料加工工程

办公地点:铸造中心101

联系方式:0411-84706220

电子邮箱:jiejc@dlut.edu.cn

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

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论文类型:期刊论文

发表时间:2016-01-01

发表刊物:ACTA METALLURGICA SINICA-ENGLISH LETTERS

收录刊物:SCIE、EI

卷号:29

期号:1

页面范围:28-31

ISSN号:1006-7191

关键字: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 Al-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 alpha-Al during the rapid solidification. The icosahedral phases are primarily precipitated from the melt into fine cellular and dendritic particles, and subsequently engulfed by the alpha-Al which propagates in a planar morphology.