替代元素对化合物Gd_3Ni和GdNi_2微结构的影响

Influences of substitute elements on microstructures of Gd_3Ni and GdNi_2 compounds

采用X射线粉末衍射法,研究了化合物Gd3(Ni1-xCox)、(Gd1-xYx)3Ni和(Gd1-xYx)Ni2(x=0,0.2,0.4,0.6,0.8,1.0)的晶体结构,并利用内标法精确测定其点阵参数的变化。研究结果表明,Gd3(Ni1-xCox)、(Gd1-xYx)3Ni和(Gd1-xYx)Ni2分别保持了Gd3Ni和GdNi2的晶体结构;这些化合物的点阵参数变化趋势符合费伽定律。

The crystal structures of Gd3 （ Ni1 -x Cox ） , （ Gd1 -x Yx ） 3 Ni and （ Gd1 -x Yx ） Ni2 （ x = 0, 0. 2, 0. 4,0. 6,0. 8,1.0） compounds were investigated by means of X-ray powder diffraction technique. The variations of lattice parameters of these compounds were determined by using the internal standard method. The results showed that Gd3 （ Ni1- x Cox ）, （Gd1-x Yx ） 3 Ni and （ Gd1-x Yx ） Ni2 remained crystallizing in crystal structure of Gd3 Ni and GdNi2 , respectively. The variations of lattice parameters of these compounds follow Vegard＇s law well.