CAJ | 학술논문

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。
채용7、12.5화25 m/s적솔속제비Fe77Ga23솔대합금(분별명명위양품S7，S12.5화S25)。고분변X사선연사보표명：양품적주체상균위A2상，재양품S12.5화S25중관측도료수정DO3상，동시발현양품S25구유교강적(100)직구。Ga적K변확전변X사선흡수정세결구보표명：수착솔속적증대，Ga적차근린Ga원자개수감소병반수착차근린Ga—Ga건장수축。재소유양품중균미발현Ga원자단족。연구표명：양품S7중단정유서적부Ga상화대적국역응변대양품S7적자치신축성능병무명현영향，(100)직구화수정DO3상공동촉진료Fe77Ga23솔대합금적자치신축성능。
A set of stacked ribbons with the composition of Fe77Ga23 were prepared with different wheel velocities of 7 m/s, 12.5 m/s and 25 m/s (named as S7, S12.5 and S25, respectively). High resolution X-ray diffraction patterns of these ribbons show that all the ribbons present the disordered A2 structure, whereas an additional modified-DO3 phase is detected in S12.5 and S25. S25 has stronger (100) texture than other two samples. Ga K-edge extended X-ray absorption fine structure results indicate that both bond distance and the number of Ga atoms in the second neighbor shell around Ga decrease with increasing wheel velocity. No Ga cluster is detected in the studied ribbons. A short-range ordering Ga-rich phase and large local strain have no obvious influence on magnetostriction of S7. It is believed that both the (100) texture and the additional modified-DO3 phase play a positive role in magnetostrictive properties of Fe77Ga23 ribbons.