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Title: Investigation on microstructure characterization and property of rapidly solidified Mg-Zn-Ca-Ce-La alloys

Abstract

Rapidly solidified (RS) Mg-Zn-Ca-Ce-La (wt.%) alloys have been produced via atomizing the alloy melt and subsequent splat-quenching on the water-cooled copper twin-rollers in the form of flakes. Microstructure characterization, phase compositions and thermal stability of the alloys have been systematically investigated. The results showed that with addition of RE (Ce and La) to the Mg-6Zn-5Ca alloy, the stable intermetallic compounds i.e. the Mg{sub x}Zn{sub y}RE{sub z} phase with a few Ca (about 3 at.%), shortened as the T Prime phase, were formed at the expense of the binary Mg-Zn and Ca{sub 2}Mg{sub 6}Zn{sub 3} phases, which was possibly beneficial to the enhanced thermal stability of the alloy. In the Mg-6Zn-5Ca-3Ce-0.5La alloy, the composition of the T Prime phase in the grain interior was different from that at the grain boundaries, in which the segregation of the La elements was found, and the atomic percentage ratio of Zn to Ce in the T Prime phase within the grains was close to 2. Moreover, the stable Mg{sub 2}Ca phases were detected around the T Prime phases at the grain boundaries in the alloy. - Research Highlights: Black-Right-Pointing-Pointer The phase constitution of RS Mg-6Zn-5Ca alloy can be improved by RE additions. Black-Right-Pointing-Pointer Inmore » the Mg-Zn-Ca-Ce-La alloys, the Mg{sub x}Zn{sub y}RE{sub z} phase with a few Ca (T Prime phase) is formed. Black-Right-Pointing-Pointer The formation of the T Prime phase leads to the loss of the Mg-Zn and Ca{sub 2}Mg{sub 6}Zn{sub 3} phases. Black-Right-Pointing-Pointer The composition of the T Prime phase differs from the grain interior to the grain boundary.« less

Authors:
 [1];  [2];  [1];  [1];  [1]
  1. College of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054 (China)
  2. College of Material Science and Engineering, Hunan University, Changsha 410082 (China)
Publication Date:
OSTI Identifier:
22066409
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 63; Journal Issue: Complete; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM; CERIUM; COPPER; GRAIN BOUNDARIES; INTERMETALLIC COMPOUNDS; LANTHANUM; MANGANESE; PHASE STABILITY; PHASE STUDIES; QUENCHING; RARE EARTH ADDITIONS; SEGREGATION; SOLIDIFICATION; ZINC

Citation Formats

Zhou Tao, E-mail: tzhou1118@163.com, Chen Zhenhua, E-mail: chenzhenhua45@hotmail.com, Yang Mingbo, E-mail: yangmingbo@cqit.edu.cn, Hu Jianjun, E-mail: hujj@qq.com, and Xia Hua, E-mail: xiahua@cqut.edu.cn. Investigation on microstructure characterization and property of rapidly solidified Mg-Zn-Ca-Ce-La alloys. United States: N. p., 2012. Web. doi:10.1016/J.MATCHAR.2011.10.004.
Zhou Tao, E-mail: tzhou1118@163.com, Chen Zhenhua, E-mail: chenzhenhua45@hotmail.com, Yang Mingbo, E-mail: yangmingbo@cqit.edu.cn, Hu Jianjun, E-mail: hujj@qq.com, & Xia Hua, E-mail: xiahua@cqut.edu.cn. Investigation on microstructure characterization and property of rapidly solidified Mg-Zn-Ca-Ce-La alloys. United States. doi:10.1016/J.MATCHAR.2011.10.004.
Zhou Tao, E-mail: tzhou1118@163.com, Chen Zhenhua, E-mail: chenzhenhua45@hotmail.com, Yang Mingbo, E-mail: yangmingbo@cqit.edu.cn, Hu Jianjun, E-mail: hujj@qq.com, and Xia Hua, E-mail: xiahua@cqut.edu.cn. Sun . "Investigation on microstructure characterization and property of rapidly solidified Mg-Zn-Ca-Ce-La alloys". United States. doi:10.1016/J.MATCHAR.2011.10.004.
@article{osti_22066409,
title = {Investigation on microstructure characterization and property of rapidly solidified Mg-Zn-Ca-Ce-La alloys},
author = {Zhou Tao, E-mail: tzhou1118@163.com and Chen Zhenhua, E-mail: chenzhenhua45@hotmail.com and Yang Mingbo, E-mail: yangmingbo@cqit.edu.cn and Hu Jianjun, E-mail: hujj@qq.com and Xia Hua, E-mail: xiahua@cqut.edu.cn},
abstractNote = {Rapidly solidified (RS) Mg-Zn-Ca-Ce-La (wt.%) alloys have been produced via atomizing the alloy melt and subsequent splat-quenching on the water-cooled copper twin-rollers in the form of flakes. Microstructure characterization, phase compositions and thermal stability of the alloys have been systematically investigated. The results showed that with addition of RE (Ce and La) to the Mg-6Zn-5Ca alloy, the stable intermetallic compounds i.e. the Mg{sub x}Zn{sub y}RE{sub z} phase with a few Ca (about 3 at.%), shortened as the T Prime phase, were formed at the expense of the binary Mg-Zn and Ca{sub 2}Mg{sub 6}Zn{sub 3} phases, which was possibly beneficial to the enhanced thermal stability of the alloy. In the Mg-6Zn-5Ca-3Ce-0.5La alloy, the composition of the T Prime phase in the grain interior was different from that at the grain boundaries, in which the segregation of the La elements was found, and the atomic percentage ratio of Zn to Ce in the T Prime phase within the grains was close to 2. Moreover, the stable Mg{sub 2}Ca phases were detected around the T Prime phases at the grain boundaries in the alloy. - Research Highlights: Black-Right-Pointing-Pointer The phase constitution of RS Mg-6Zn-5Ca alloy can be improved by RE additions. Black-Right-Pointing-Pointer In the Mg-Zn-Ca-Ce-La alloys, the Mg{sub x}Zn{sub y}RE{sub z} phase with a few Ca (T Prime phase) is formed. Black-Right-Pointing-Pointer The formation of the T Prime phase leads to the loss of the Mg-Zn and Ca{sub 2}Mg{sub 6}Zn{sub 3} phases. Black-Right-Pointing-Pointer The composition of the T Prime phase differs from the grain interior to the grain boundary.},
doi = {10.1016/J.MATCHAR.2011.10.004},
journal = {Materials Characterization},
issn = {1044-5803},
number = Complete,
volume = 63,
place = {United States},
year = {2012},
month = {1}
}