Magnetostriction and microstructure of melt-spun Fe_(77)Ga_(23) ribbons prepared with different wheel velocities  

不同甩速制备的Fe_(77)Ga_(23)甩带合金的磁致伸缩性能和显微组织(英文)

作　　者：刘昊[1] 王海欧[1] 曹梦雄[1] 谭伟石[1] 时阳光[2] 徐锋[3] 贾全杰[4] 黄宇营[5] 

机构地区：[1]南京理工大学理学院应用物理系,软化学与功能材料教育部重点实验室,南京210094 [2]南京航空航天大学理学院应用物理系,南京211106 [3]南京理工大学材料科学与工程学院,南京210094 [4]中国科学院高能物理研究所,北京100039 [5]中国科学院上海应用物理研究所,上海201800

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第1期122-128,共7页中国有色金属学报（英文版）

基　　金：Projects(11079022,51271093,10904071,U1332106)supported by the National Natural Science Foundation of China

摘　　要：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.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。

关 键 词：MAGNETOSTRICTION texture modified-DO3 phase melt-spun Fe77Ga23 ribbon 

分 类 号：TG115[金属学及工艺—物理冶金]