| 低Zn、高RE含量Mg－Zn－Zr－RE合金的相组成 |
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| 引用本文： | 罗治平,张少卿,隗国,鲁立奇, 汤亚力,赵东山.低Zn、高RE含量Mg－Zn－Zr－RE合金的相组成[J].航空学报,1994,15(7):860-865. |
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| 作者姓名： | 罗治平 张少卿 隗国 鲁立奇 汤亚力 赵东山 |
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| 作者单位： | 北京航空材料研究所，郑州工学院材料研究中心 |
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| 摘 要： | 研究了低Ｚｎ、高ＲＥ含量Ｍｇ－Ｚｎ－Ｚｒ－ＲＥ合金的铸态相组成。在含高品位Ｙ的合金中,稀土相由晶界片状Ｘ相和晶内弥散分布的方形Ｍｇ＿（２４）Ｙ＿５相组成,并确定晶界片状Ｘ相为１８Ｒ调制结构,调制周期为０．２６ｎｍ。在含混合稀土的合金中,稀土相由Ｍｇ＿（１２）ＲＥ和晶内弥散分布的Ｍｇ＿（２４）Ｙ＿５相组成。分析表明,与ＭＢ２５合金相比,晶粒细化、稀土相的晶界强化和弥散强化可能是低Ｚｎ、高ＲＥ含量Ｍｇ－Ｚｎ－Ｚｒ－ＲＥ合金的强化原因。
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| 关 键 词： | 稀土合金 镁合金 相－组成 |
PHASE CONSTITUTIONS OF Mg-Zn-Zr-RE ALLOYS WITHLOW Zn AND HIGH RE ADDITIONS |
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| Luo Zhiping,Zhang Shaoqing,Wei Guo, Lu Liqi.PHASE CONSTITUTIONS OF Mg-Zn-Zr-RE ALLOYS WITHLOW Zn AND HIGH RE ADDITIONS[J].Acta Aeronautica et Astronautica Sinica,1994,15(7):860-865. |
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| Authors: | Luo Zhiping Zhang Shaoqing Wei Guo Lu Liqi |
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| Institution: | 1. Faculty No. 4 of Beijing Institute of Aeronautical Materials, Beijing,100095;2. Materials Research Center, Zhengzhou Institute of Technology, Zhengzhou, 450002 |
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| Abstract: | The phase constitutions of Mg-Zn-Zr-RE alloys with low Zn and high RE addi-tions have been studied.In the alloys containing high purity-Y, the X phase at the grain bounda-ries(GBs) and the small square shaped Mg_(24)Y_5 phase in the grain interior are presented.The structure of the X phase is determined as the 1 8 R modulated structure with periodicity of 0.26nm. In the alloys containing Y-or Ce-rich mischmetals,the net-shaped Mg_(12)RE phase at the GBs and the small square-shaped Mg_(24)Y_5 phase in the grain interior are presented. As compared with the MB25 alloy, the grain refining and the strengthening by the rare earth com-pounds at the GBs and in the grain interior may cause the high strength of this kind of alloy. |
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| Keywords: | rare earth alloys magnesium alloys phases constitution |
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