研究了Tb0.36Dy0.64(Fe0.85Co0.1)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α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.
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