论文部分内容阅读
采用7、12.5和25 m/s的甩速制备Fe77Ga23甩带合金(分别命名为样品S7,S12.5和S25)。高分辨X射线衍射谱表明:样品的主体相均为A2相,在样品S12.5和S25中观测到了修正DO3相,同时发现样品S25具有较强的(100)织构。Ga的K边扩展边X射线吸收精细结构谱表明:随着甩速的增大,Ga的次近邻Ga原子个数减少并伴随着次近邻Ga—Ga键长收缩。在所有样品中均未发现Ga原子团簇。研究表明:样品S7中短程有序的富Ga相和大的局域应变对样品S7的磁致伸缩性能并无明显影响,(100)织构和修正DO3相共同促进了Fe77Ga23甩带合金的磁致伸缩性能。
Fe77Ga23 alloy was prepared using 7, 12.5 and 25 m / s rejection rates (named samples S7, S12.5 and S25, respectively). High-resolution X-ray diffraction spectra showed that the main phase of the sample was phase A2, and the modified DO3 phase was observed in samples S12.5 and S25, and the sample S25 was found to have a strong (100) texture. The X-ray absorption fine structure spectrum of Ga side edge of Ga shows that with the increase of the rejection rate, the number of next-nearest neighbor Ga atoms in Ga decreases and the sub-adjacent Ga-Ga bond shrinks. Ga atom clusters were not found in all samples. The results show that the short-range ordered Ga-rich phase and large local strain in sample S7 have no significant effect on the magnetostriction of sample S7. The (100) texture and the modified DO3 phase contribute to the magnetism of Fe77Ga23 alloy Tensile properties.