Phase relationship of Dy-Fe-Mn system at 773 K

作     者：杜成梅 马君 姚路 陈国坚 杨通晗 曾维敬 何维 DU Chengmei;MA Jun;YAO Lu;CHEN Guojian;YANG Tonghan;ZENG Weijing;HE Wei

作者机构：Key Laboratory of Nonferrous Metal Materials and New Processing TechnologyCollege of Materials Science and EngineeringMinistry of EducationGuangxi University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2014年第32卷第7期

页      面：655-662页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0708[理学-地球物理学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Project supported by National Natural Science Foundation of China(50861005,51261002) the Natural Science Foundation of Guangxi(2011GXNSFD018005) 

主　　题：Dy-Fe-Mn phase diagram crystal structure X-ray diffraction rare earths 

摘      要：Rare-earth intermetallic compounds formed in many R-Fe-Mn（R=rare-earth element） systems exhibit excellent properties. In order to understand the existence and stability of the compounds in the system and further search for the potential application of R-Fe-Mn alloys in various aspects, it is necessary to investigate the phase relations of the Dy-Fe-Mn ternary system. A total of 96 samples of the Dy-Fe-Mn alloys were prepared by arc-melting and examined by metallographic analysis, X-ray diffraction（XRD）, scanning electron microscopy（SEM） and energy dispersive spectroscopy（EDS） techniques. The phase relationship of the Dy-Fe-Mn system at 773 K was determined. It was found that the isothermal section was characterized by intermediate solid solutions based on the substitutions of Fe/Mn atoms and the large extensions of the binaries into the ternary domains. The solid solubilities of the third element in the binary compounds and the phase boundaries were also determined by XRD technique using the phase disappearing method combined with the lattice parameter method and SEM/EDS technique. Two pairs of corresponding binary compounds in the Dy-Fe and Dy-Mn systems（DyFe2 and DyMn2, Dy6Fe23 and Dy6Mn23） formed a continuous series of solid solution at 773 K, respectively.