Tb_(0.36)Dy_(0.64)(Fe_(0.85)Co_(0.15))_(2-x)B_x合金的结构和磁致伸缩  

Structure and Magnetostriction of Tb_(0.36)Dy_(0.64)(Fe_(0.85)Co_(0.15))_(2-x)B_x Alloys

作　　者：陈先艳[1] 马天宇[1] 许盼盼[1] 严密[1] 

机构地区：[1]浙江大学硅材料国家重点实验室,浙江杭州310027

出　　处：《稀有金属材料与工程》2008年第8期1502-1504,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50701039);新世纪优秀人才支持计划(05-0526);教育部创新团队研究计划(IRT-0651)

摘　　要：研究了Tb0.36Dy0.64(Fe0.85Co0.15)2-xBx(x=0,0.05,0.15,0.30)合金的结构、显微组织和磁致伸缩。结果表明,Tb0.36Dy0.64(Fe0.85Co0.15)2-xBx合金基体仍为MgCu2型立方结构Laves相,合金点阵常数a随B含量增加先减小后增大;当B含量达到x=0.15时,样品中开始有杂相析出。少量B(x=0.05)添加时,合金的饱和磁致伸缩有所提高;随B含量继续增加,合金中形成1:3相以及富硼相,饱和磁致伸缩急剧下降。The crystal structure, microstructure and magnetostriction of Tb0.a6Dy0.64（Fe0.ssCo0.15）2-xBx（x=0, 0.05, 0.15, 0.30） alloys have been investigated. The matrix of Tb0.36Dy0.64（Fe0.85Co0.15）2-xBx alloys consists predominantly of the cubic Laves phase with a MgCu2-type structure. The lattice parameter a of the Laves phase in the alloys first decreases with increasing of the boron content and then increases. As the boron content increases up to x = 0.15, some impurity phases emerge, such as PuNia-type phase and boron rich phase. The saturation magnetostriction of the alloy increases when x≤0.05, but decreases sharply when further increasing B. The decrease in the saturation magnetostriction is attributed to the formation of the PuNi3-type phase and boron rich phase.

关 键 词：Tb0.36Dy0.64(Fe0.85Co0.15)2合金 磁致伸缩 LAVES相 富稀土相 B添加 

分 类 号：TM273[一般工业技术—材料科学与工程]