Fe83Ga17Tby合金组织结构及磁致伸缩性能

稀有金属材料与工程, 2013, 42(10): 2139-2143.

Fe83Ga17Tby合金组织结构及磁致伸缩性能

龚沛 ^1, , 江丽萍 ^2, , 赵增祺 ^3, , 吴双霞 ^4,

1.内蒙古工业大学,内蒙古呼和浩特010051

2.包头稀土研究院,内蒙古包头014010

3.包头稀土研究院,内蒙古包头014010

4.包头稀土研究院,内蒙古包头014010

基金项目: 内蒙古自然科学基金(20080404MS0802)

关键词：铽 , 铁镓合金 , 磁致伸缩

Microstructure and Magnetostrictive Properties of Fe83Ga17Tby Alloys

Gong Pei ^1, , Jiang Liping ^2, , Zhao Zengqi ^3, , Wu Shuangxia ^4,

1.内蒙古工业大学,内蒙古呼和浩特010051

2.包头稀土研究院,内蒙古包头014010

3.包头稀土研究院,内蒙古包头014010

4.包头稀土研究院,内蒙古包头014010

Keywords： Tb , Fe-Ga alloy , magnetostriction

研究了Fe83Ga17Tby (y=0,0.2,0.4,0.6,0.8)合金的显微组织结构和磁致伸缩性能.XRD显示:Fe83Ga17Tby铸态合金以A2相为主,有少量DO3、DO19和L12相;L12和DO3相随铽含量的增加而增加,铽促进了Fe83Ga17合金(200)织构的形成;背散射电子像及能谱点分析显示合金加入铽后,晶粒从等轴晶转变为柱状晶,铽富集于晶界.铽添加导致Fe83Ga17磁致伸缩性能增加,其最佳添加量是0.2 at％,Fe83Ga17Tb0.2在低场下磁致伸缩系数可达1.5×10-4;铽的外层电子影响自旋-轨道耦合,可能是导致磁致伸缩性能增加的原因.

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