Study on stability of RECo_5 phases(RE=Dy,Gd)  

作　　者：朱其明 庄应烘 梁建烈 邓健秋 李均钦 周开文 

机构地区：[1]College of Physics and Electronic Engineering, Gnangxi 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

出　　处：《Journal of Rare Earths》2009年第1期100-103,共4页稀土学报（英文版）

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)

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.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 

分 类 号：TG115.3[金属学及工艺—物理冶金]