(Fe_(81.5)Co_(1.5)Ga_(17))_(100-x)Tb_(x)合金结构及其磁性能  

The Structure and Magnetic Properties of(Fe_(81.5)Co_(1.5)Ga_(17))_(100-x)Tb_(x) Alloys

作　　者：张光睿[1] 姚特 龚沛[2] 乔禹[1] 王婷婷[1] 梁雨萍 郝宏波[1] ZHANG Guangrui;YAO Te;GONG Pei;QIAO Yu;WANG Tingting;LIANG Yuping;HAO Hongbo(State Key Laboratory for Research and Comprehensive Utilization of Rare Earth Resources in Bayan Obo District,Baotou Research Institute of Rare Earths,Baotou 014030,Inner Mongolia,China;School of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]包头稀土研究院,白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]内蒙古工业大学材料科学与工程学院,呼和浩特010051

出　　处：《材料导报》2022年第5期133-137,共5页Materials Reports

基　　金：内蒙古自治区自然科学基金重大项目(2018ZD10)。

摘　　要：制备(Fe_(81.5)Co_(1.5)Ga_(17))_(100-x)Tb_(x)(x=0,0.05,0.10,0.15,0.20)系列合金铸锭,探究了Tb元素添加对Fe_(81.5)Co_(1.5)Ga_(17)合金结构及其磁性能的影响。结果表明,该系列合金均以无序α-Fe体心立方结构为主,加入Tb元素后合金晶格常数增加,I_(200)/I_(110)相对峰强度变化与晶格常数变化趋势一致,合金在[100]晶向择优取向。Tb元素的添加使合金析出富Tb相,并使合金晶粒细化。随着Tb元素含量的增加,合金中分布的富Tb相由分散状态逐渐变为连续的网状结构,并产生枝状晶。(Fe_(81.5)Co_(1.5)Ga_(17))_(100-x)Tb_(x)合金的饱和磁致伸缩系数随x值的增大呈先增大后减小的趋势,x=0.10时合金的饱和磁致伸缩系数达到217×10^(-6),相比x=0的合金提升11%。该系列合金中,当磁场小于40 kA/m时,x=0的合金的磁致伸缩率最大;当磁场为40~80 kA/m时,x=0.10的合金的磁致伸缩率最大;当磁场为80~120 kA/m时,x=0.20的合金的磁致伸缩率最大;磁场大于120 kA/m后,合金的磁致伸缩基本达到饱和,x=0.10,0.15的合金具有高饱和磁致伸缩系数。该系列合金饱和磁化强度值随Tb元素的增加先增后降,x=0.05时合金的饱和磁化强度达到最大,为210.06 emu/g。The ingots of(Fe_(81.5)Co_(1.5)Ga_(17))_(100-x)Tb_(x)(x=0,0.05,0.10,0.15,0.20)series alloys were prepared,and the effects of Tb element addition on the structure and magnetic properties of Fe_(81.5)Co_(1.5)Ga_(17) alloy were investigated.The results show that the disorderedα-Fe body centered cubic structure is the main structure in this series of alloys,the lattice constant of the alloys increase with the addition of Tb element,the change of relative peak strength is consistent with the change trend of lattice constant,alloy preferred orientation in[100]crystal direction.The addition of Tb element precipitates Tb-rich phase and makes the alloy grain refined.With the increase of Tb element content,the Tb-rich phase distribution in the alloy gradually changes from a dispersed state to a continuous network structure and produces dendritic crystals.The saturated magnetostrictive coefficient of the alloys increase first and then decreases with the increase of x value.When x=0.10,the saturated magnetostrictive coefficient of the alloy reached 217×10^(-6),compared with x=0 alloy,the saturated magnetostrictive coefficient increased by 11%.In this series of alloys,when the magnetic field is less than 40 kA/m,the magnetostrictive rate of x=0 alloy is the highest.When the magnetic field is 40—80 kA/m,x=0.10 alloy magnetostriction rate is the highest.When the magnetic field range is 80—120 kA/m,the magnetostrictive rate of the alloy x=0.20 is the highest.When the magnetic field is greater than 120 kA/m,the alloy magnetostrictive basically reaches saturation,x=0.10,0.15 alloy has high saturation magnetostrictive coefficient.The saturated magnetization value of this series of alloys increases first and then decreases with the increase of Tb elements.When x=0.05,the saturated magnetization value of the alloys reaches the maximum value of 210.06 emu/g.

关 键 词：Fe-Co-Ga合金 Tb元素添加 富Tb相 磁致伸缩 磁性能 

分 类 号：TB34[一般工业技术—材料科学与工程]