Partial phase relationships of Mg-Zn-Ce system at 350 ℃  

作　　者：黄明丽 李洪晓 丁桦 任玉平 秦高梧 郝士明 

机构地区：[1]Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University [2]Department of Materials Science and Engineering, Northeastern University (Qinhuangdao)

出　　处：《中国有色金属学会会刊：英文版》2009年第3期681-685,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(50471025) supported by the National Natural Science Foundation of China;Project(20052028) supported by the Natural Science Foundation of Liaoning Province, China;Project(2006BAE04B09-7) supported by the National Key Technology R&D Program during the 11th Five-Year Plan Period

摘　　要：The alloys were prepared in Mg-rich corner of Mg-Zn-Ce system. Partial phase equilibrium relationships of these alloys at 350 ℃ were identified by using scanning electron microscopy(SEM), electron probe microanalysis(EPMA), X-ray diffraction(XRD) analysis and selected area electron diffraction(SAED) pattern analysis of transmission electron microscopy(TEM). Partial isothermal section of Mg-Zn-Ce system in Mg-rich corner was identified. The results show that there is one ternary compound (T-phase) in Mg-Zn-Ce system. The T-phase is a linear ternary compound in which the content of Ce is about 7.7% (molar fraction); while the content of Zn is changed from 19.3% to 43.6% (molar fraction). The crystal structure of T-phase is C-centered orthorhombic. In addition, one two-phase region of Mg+T-phase and one three-phase region of Mg+T-phase+MgZn(Ce) exist in the Mg-rich corner of Mg-Zn-Ce system at 350 ℃.The alloys were prepared in Mg-rich corner of Mg-Zn-Ce system. Partial phase equilibrium relationships of these alloys at 350℃ were identified by using scanning electron microscopy（SEM）, electron probe microanalysis（EPMA）, X-ray diffraction（XRD） analysis and selected area electron diffraction（SAED） pattern analysis of transmission electron microscopy（TEM）. Partial isothermal section of Mg-Zn-Ce system in Mg-rich corner was identified. The results show that there is one ternary compound （T-phase） in Mg-Zn-Ce system. The T-phase is a linear ternary compound in which the content of Ce is about 7.7% （molar fraction）; while the content of Zn is changed from 19.3% to 43.6% （molar fraction）. The crystal structure of T-phase is C-centered orthorhombic. In addition, one two-phase region of Mg＋T-phase and one three-phase region of Mg＋T-phase＋MgZn（Ce） exist in the Mg-rich corner of Mg-Zn-Ce system at 350 ℃.

关 键 词：镁锌铈 摩尔分数 晶体结构 T细胞 

分 类 号：TG146.22[一般工业技术—材料科学与工程]