摘要 已经通过 X 射线分析研究了 Er-{Fe,Co}-{Ti,V} 系统相图的等温截面。Er M 12 - x M ' x (M = Fe, Co; M' = Ti, V) 三元化合物(ThMn 12 结构类型,空间群I 4/ mmm )的存在已被证实,并确定了它们的均质范围。观察到基于ErM 2 的固溶体Er M 2 - x M ' x (MgCu 2 结构类型,空间群Fd -3 m )的形成。已经研究了 ErFe 2- x M x (M = Ti、V、Cr、Mn、Co、Ni、Cu、Mo) 合金的吸氢。
Abstract The phase diagram of the V–Co–Sb ternary system was constructed at 870 K over the whole concentration range using X-ray powder diffraction and electron probe microanalysis. The formation of one ternary compound VCoSb with MgAgAs type structure (half-Heusler phase, space group F-43m, a = 0.57838(2) nm) was confirmed. The influence of V doping on electrical transport property behavior of the binary
摘要 使用 X 射线粉末衍射和电子探针微量分析在整个浓度范围内在 870 K 下构建了 V-Co-Sb 三元系统的相图。证实了一种具有 MgAgAs 型结构(半赫斯勒相,空间群 F-43m,a = 0.57838(2) nm)的三元化合物 VCoSb 的形成。通过测量电阻率和塞贝克系数以及从头算 DFT 计算,研究了 V 掺杂对二元方钴矿 CoSb3(CoAs3 型,空间群 Im-3)电传输特性的影响。
The isothermal section of the Dy–Co–V ternary system at 773K
作者:Hailong Wang、Huaiying Zhou、Qingrong Yao、Xiaodong Hu、Shunkang Pan、Zhongmin Wang
DOI:10.1016/j.jallcom.2008.12.124
日期:2009.6
Phase equilibria were established in the Dy-Co-V ternary system at 773 K by X-ray powder diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscopy (SEM). The result shows that the isothermal section consists of 13 single-phase regions, 23 two-phase regions and 12 three-phase regions. The maximum solid solubilities of V in (Co), Dy2Co17, DyCo3, DyCo2, Dy12Co7 and Dy3Co are about 6.5,10.0, 2.0, 6.3, 1.5 and 5.0 at.% V, respectively. It is found that there is some homogeneity range in the only ternary compound of DyCo12-xVx With x= 1.6-3.8 at 773 K. There is no solubility of V in Dy2Co7 observed at 773 k. The binary compounds Dy4Co3 and DyCo5 are not observed at 773 K. (C) 2009 Published by Elsevier B.V.