Improved magnetostriction in Fe83Ga17 alloy by tensile-stress annealing treatment

Improved magnetostriction in Fe83Ga17 alloy by tensile-stress annealing treatment
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通过拉应力退火处理改善 Fe83Ga17 合金的磁致伸缩

DOI:
10.1016/j.jallcom.2008.01.076
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发表时间:
2009-02
影响因子:
6.2
通讯作者:
--
中科院分区:
材料科学2区
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--
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为了优化Fe-Ga合金的磁致伸缩性能,采用了一种新的拉应力热处理方法对织构多晶棒进行了热处理。利用织构结构中本征磁晶各向异性与形状各向异性的一致性,在不施加预应力的情况下,Fe_(83)Ga_(17)合金获得了高达200 ppm的大磁致伸缩。这样的样品也表现出大的预应力可调幅度,约90%的总磁致伸缩。由于磁矩的完全对齐,bcc(A2)相的磁致伸缩贡献可以被排除,并且Fe 3Ga(DO 3)相的磁致伸缩行为已经被详细研究。
For optimizing the magnetostriction in Fe–Ga alloys, a novel tensile-stress heat-treatment method has been used for textured polycrystalline rods. Utilizing the consistency between the intrinsic magnetocrystalline anisotropy and the shape anisotropy in the textured structure, a large magnetostriction up to 200ppm has been obtained in an alloy with composition Fe83Ga17without application of pre-stress. Such samples also exhibit large pre-stress adjustable magnitude, about 90% for total magnetostriction. Due to the complete alignment of the magnetic moments, a magnetostriction contribution of the bcc (A2) phase can be ruled out and the magnetostrictive behavior of the Fe3Ga (DO3) phase has been investigated in detail.
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