Phase equilibria in Nb-Y-Si ternary system at 873 K  

作　　者：姜文平 湛永钟 李春流 柳帅 周慧黠 庄应烘 

机构地区：[1]Laboratory of Nonferrous Metal Materials and New Processing Technology,Ministry of Education,Guangxi University

出　　处：《Journal of Rare Earths》2012年第9期934-940,共7页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China (51161002);Guangxi Natural Science Foundation (2011GXNSFA018017);the Guangxi Science and Technology Development Project (1114003-1)

摘　　要：The isothermal section of the Nb-Y-Si ternary system at 873 K was investigated over the whole concentration range mainly by powder X-ray diffraction （XRD）, scanning electron microscopy （SEM） and energy dispersive analysis （EDX）. This isothermal section con- sisted of 10 single-phase regions, 17 two-phase regions, and 8 three-phase regions. The existence of the binary compounds, i.e., Y5Si3, Y5Si4, YSi, Y3Sis, YSi〉 NbsSi3 and NbSi2 at 873 K was confirmed. On the basis of XRD patterns, the structure types of Y3Si4, Y3Si5 and YSi2 were discussed. No ternary compound and no detectable solid solubility in the binary compounds were found.The isothermal section of the Nb-Y-Si ternary system at 873 K was investigated over the whole concentration range mainly by powder X-ray diffraction （XRD）, scanning electron microscopy （SEM） and energy dispersive analysis （EDX）. This isothermal section con- sisted of 10 single-phase regions, 17 two-phase regions, and 8 three-phase regions. The existence of the binary compounds, i.e., Y5Si3, Y5Si4, YSi, Y3Sis, YSi〉 NbsSi3 and NbSi2 at 873 K was confirmed. On the basis of XRD patterns, the structure types of Y3Si4, Y3Si5 and YSi2 were discussed. No ternary compound and no detectable solid solubility in the binary compounds were found.

关 键 词：Nb-Y-Si phase diagram isothermal section XRD rare earths 

分 类 号：TG111[金属学及工艺—物理冶金]