Investigation on microstructure characterizations and phase compositions of rapidly solidification/powder metallurgy Mg-6 wt.% Zn-5 wt.% Ce-1.5 wt.% Ca alloy

被引：14
作者：
Zhou, Tao [1 ]
Xia, Hua [1 ]
Yang, Mingbo [1 ]
Zhou, Zhiming [1 ]
Chen, Kang [1 ]
Hu, Jianjun [1 ]
Chen, Zhenhua [2 ]
机构：
[1] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China
[2] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 09期
关键词：
Rapidly solidification/powder metallurgy; Mg-Zn-Ce-Ca alloy; Microstructure; Thermal property; UNDERCOOLED NICKEL-TIN; RARE-EARTH ALLOYS; MECHANICAL-PROPERTIES; DENDRITIC GROWTH; MAGNESIUM ALLOYS; Y ALLOYS; SYSTEM; BEHAVIOR;
D O I：
10.1016/j.jallcom.2010.12.133
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Rapidly solidification/powder metallurgy (RS/PM) Mg-6Zn-5Ce-1.5Ca (wt.%) alloy in form of rods has been prepared by hot extrusion with RS powders, produced via atomizing the alloy melt and subsequent splat-quenching on the water-cooled copper twin-rollers. Microstructure characterizations and phase compositions of the alloy have been investigated. The results showed that the RS/PM Mg-6Zn-5Ce-1.5Ca alloy was the characteristics of very fine grains with the size ranging from 200 to 650 nm and was composed of alpha-Mg, Mg(x)Zn(y)Ce(z) phase with a few Ca (about 1 at.%) shortened as the Mg(x)Zn(y)Ce(z)-(Ca) phase, and a small quantity of Mg(51)Zn(20) phases. The melting point of the Mg(x)Zn(y)Ce(z)-(Ca) phase in the alloy was a little higher than that of the Mg(x)Zn(y)Ce(z) phase in RS/PM Mg-6Zn-5Ce alloy, which may be due to the dissolving of Ca in it. Moreover, the atomic percentage ratio of Zn to Ce in the Mg(x)Zn(y)Ce(z)-(Ca) phase around the grain boundary was close to 1.5. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：L145 / L149
页数：5
相关论文
共 29 条
  • [1] Anyanwu IA, 2004, MAT SCI ENG A-STRUCT, V380, P93, DOI 10.1016/j.mesa.2004.03.039
  • [2] [陈晓强 CHEN Xiaoqiang], 2008, [材料导报, Materials Review], V22, P58
  • [3] DOBATKINA TV, 1987, RUSS METALL+, P205
  • [4] Drits M.E., 1971, Russ. Metall, V1, P143
  • [5] DRITS ME, 1989, RUSS METALL+, P195
  • [6] Microstructure and mechanical properties of Mg-Al based alloy with calcium and rare earth additions
    Du, WW
    Sun, YS
    Min, XG
    Xue, F
    Zhu, M
    Wu, DY
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 356 (1-2): : 1 - 7
  • [7] Itoi T., 2006, Journal of Japan Institute of Light Metals, V56, P543, DOI 10.2464/jilm.56.543
  • [8] JI ZS, 2001, LIGHT ALLOY FABRICAT, V29, P1
  • [9] Microstructures and mechanical properties of Mg-Zn-RE-Ca casting alloys
    Jun, Joong-Hwan
    Park, Bong-Koo
    Kim, Jeong-Min
    Kim, Ki-Tae
    Jung, Woon-Jae
    [J]. ECO-MATERIALS PROCESSING & DESIGN VII, 2006, 510-511 : 214 - 217
  • [10] Effect of volume fraction of qusicrystal on the mechanical properties of quasicrystal-reinforced Mg-Zn-Y alloys
    Lee, Ju Youn
    Lim, Hyun Kyu
    Kim, Do Hyung
    Kim, Won Tae
    Kim, Do Hyang
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 449 (987-990): : 987 - 990
123