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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：大连理工大学
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：大连理工大学铸造中心
电子邮箱：fcf@dlut.edu.cn
Formation of long-period stacking ordered structures in Mg88M5Y7 (M = Ti, Ni and Pb) casting alloys
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论文类型：期刊论文
发表时间：2013-08-15
发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS
收录刊物：SCIE、EI、Scopus
卷号：568
页面范围：21-25
ISSN号：0925-8388
关键字：Magnesium-based alloys; Long-period stacking ordered structure; Electron microscopy; Twin structure
摘要：Formation of long-period stacking ordered (LPSO) structures is investigated in Mg88M5Y7 (M = Ti, Ni and Pb) casting alloys by means of electron microscopy and X-ray diffraction. In the Mg88Ni5Y7 casting alloy, 14H-LPSO structure is observed in a small amount, which coexists with 18R-LPSO structure. The appearance of stacking faults in 18R-LPSO structure results in twin-related structure in the stacking sequence of the closely packed planes. Anew (Pb, Mg)(2)Y phase with a body-centered orthorhombic structure is determined in the Mg88Pb5Y7 alloy. No LPSO structures are found in the Mg88Pb5Y7 and Mg88Ti5Y7 casting alloys. In terms of the atomic radius and heat of mixing, the formation ability of LPSO structure in the present alloys is discussed. (C) 2013 Elsevier B.V. All rights reserved.