Effect of the Growth Velocity on Microstructure, Orientation, and Magnetostriction in Fe81Ga19 Alloy
Effect of the Growth Velocity on Microstructure, Orientation, and Magnetostriction in Fe81Ga19 Alloy
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生长速度对 Fe81Ga19 合金显微组织、取向和磁致伸缩的影响
DOI：
10.1007/s11661-012-1289-z
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发表时间：
2012-07
影响因子：
2.8
通讯作者：
Jiang, Chengbao
中科院分区：
文献类型：
--
作者：
Li, Chuan;Liu, Jinghua;Jiang, Chengbao
采用感应加热区熔法在不同生长速度下对Fe_（81）Ga_（19）多晶棒进行了定向凝固。研究了薄膜的微观结构、择优取向和磁致伸缩性能。随着生长速度的增加，凝固组织由柱状晶向等轴晶转变。同时，固/液界面形态从平面演变为胞状，界面凹陷高度增加。以10 mm/h的速度沿生长棒的轴向检测到沿着的“001”择优取向。随着生长速度的增加，薄膜中的择优取向偏离轴向，取向度减弱。生长棒的饱和磁致伸缩在10 mm/h时为305 ppm，但在更高的速度下恶化。磁致伸缩的降低是由于微观结构的转变和取向减弱。
Polycrystalline Fe81Ga19 rods were directionally solidified by an induction heating zone melting method at different growth velocities. The microstructure, preferred orientation, and magnetostriction were investigated. As the growth velocity increased, the solidification morphology transited from columnar to equiaxed. Simultaneously, the solid/liquid interface morphology evolved from planar to cellular, accompanied by an increase in the interface concave height. The 〈001〉 preferred orientation was detected along the axial direction of the grown rod at 10 mm/h. With the increased growth velocity, the 〈001〉 preferred orientation deviated from the axial direction, and the 〈001〉 orientation degree was weakened. The saturation magnetostriction of the grown rod was 305 ppm at 10 mm/h, but it deteriorated at higher velocities. The decreased magnetostriction was attributed to the microstructure transition and the weakened 〈001〉 preferred orientation.
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影响因子：
6.2
作者：
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