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  5. Crystal structures of the compounds formed in DyCo2-DyGa2 pseudo-binary system at 773K

Crystal structures of the compounds formed in DyCo2-DyGa2 pseudo-binary system at 773K

来源 :第十四届全国相图会议暨国际相图与材料设计研讨会 | 被引量 : 0次 | 上传用户：shirleyzuo
【摘 要】
：
Serials of DyCo2-xGax alloys with x from O to 2 were prepared by arc melting and investigated by X-ray powder diffraction analysis．Four ternary compounds，DyCo1.33Ga0.67，DyCoGa,DyCo0.67-0.35Ga1.33-1.65
【作 者】
：
Liu FuSheng Ao WeiQin Wu Li Li JunQin 
【机 构】
：
College of Materials Science and Engineering,Shenzhen University and Shenzhen Key Laboratory of Spec
【出 处】
：
第十四届全国相图会议暨国际相图与材料设计研讨会
【发表日期】
：
2008年4期
【关键词】
：
晶体结构 X射线衍射 赝二元系 电弧熔炼 
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论文部分内容阅读
Serials of DyCo2-xGax alloys with x from O to 2 were prepared by arc melting and investigated by X-ray powder diffraction analysis．Four ternary compounds，DyCo1.33Ga0.67，DyCoGa,DyCo0.67-0.35Ga1.33-1.65 and DyCo0.25-0.15Ga1.75-1.85，were formed in the serial alloys with different Ga content x．The crystal structures for these compounds were determined by Rietveid refinement method using TOPAS V3.0 software．The Rietveld refinement results reveal that DyCo1.33Ga0.67 has MgZn2-type structure(P63/mmc)with a=5.414(1)and c=8.452(1)A．DyCoGa is of Co2Si-type structure(Pnma)with a=7.052(1)，b=4.393(1)and C=6.958(1)A;DyCoo．5Ga1.5 has GdPdSi-type structure(Imma)with a=4.341(1)，b=7.007(1)and C=7.551(1)A;and DyC00.2Ga1.8 has AIB2-type structure(P6/mmm)with a=4.339(1)and c=3.634(1)A．The relationships between these structures were discussed．
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