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Study on stability of RECo5 phases（RE=Dy,Gd）

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【作者】 朱其明； 庄应烘； 梁建烈； 邓健秋； 李均钦； 周开文；

【Author】 ZHU Qiming1,2, ZHUANG Yinghong2, LIANG Jianlie1, DENG Jianqiu, LI Junqin3, ZHOU Kaiwen2(1.College of Physics and Electronic Engineering, Guangxi University for Nationality, Nanning 530006, China;2.Key Laboratory of Non-Ferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning 530004, China;3.Department of Materials Science and Engineering, Shenzhen University and Shenzhen Key Laboratory of Special Functional Materials, Shenzhen 518060, China)

【机构】 College of Physics and Electronic Engineering, Guangxi University for Nationality； Key Laboratory of Non-Ferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University； Department of Materials Science and Engineering, Shenzhen University and Shenzhen Key Laboratory of Special Functional Materials；

【摘要】 The eutectoid decomposition reaction that occurred in RECo5 phases(RE=Dy and Gd ) at low temperature was discussed and confirmed by X-ray powder diffraction(XRD), differential thermal analysis, and scanning electron microscopy.The decomposition temperature of the GdCo5 and DyCo5 were identified as 805.8 and 900 °C, respectively.The GdCo5 and DyCo5 phases could not be found in the isothermal section of Gd-Dy-Co ternary system at 800 K.Reasons for the absence of the RE2Co7 phase in the XRD patterns were discussed in detail.

【Abstract】 The eutectoid decomposition reaction that occurred in RECo5 phases(RE=Dy and Gd ) at low temperature was discussed and confirmed by X-ray powder diffraction(XRD), differential thermal analysis, and scanning electron microscopy.The decomposition temperature of the GdCo5 and DyCo5 were identified as 805.8 and 900 °C, respectively.The GdCo5 and DyCo5 phases could not be found in the isothermal section of Gd-Dy-Co ternary system at 800 K.Reasons for the absence of the RE2Co7 phase in the XRD patterns were discussed in detail.

【关键词】 eutectoid decomposition； RECo5 phases； Gd-Dy-Co system； rare earths；
【Key words】 eutectoid decomposition； RECo5 phases； Gd-Dy-Co system； rare earths；
【基金】 supported by the National Natural Science Foundation of China (50471108);the Natural Science Foundation of Guangxi (0448022, 0540009, 0640040);Key Project of Guangxi University for Nationality (2007, 2008)
  • 【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2009年01期
  • 【分类号】TG115.3
  • 【被引频次】5
  • 【下载频次】77
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