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快淬Fe81Ga19合金薄带的相结构和磁致伸缩
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国家自然科学基金(50701039)和新世纪优秀人才支持计划(NCET-05-0526)资助


Phase Structure and Magnetostriction of Fe81Ga19 Melt-Spun Ribbons
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    摘要:

    采用熔体快淬法制备Fe81Ga19合金薄带,研究薄带试样的相结构和磁致伸缩性能。XRD和M-TG结果表明,快淬态Fe81Ga19合金基体为Fe(Ga)无序固溶体相,并有微量非对称结构的DO3相析出,且薄带厚度方向[100]择优取向。当测量磁场垂直带面时,薄带试样沿带长方向的饱和磁致伸缩达–1830×10-6。Fe81Ga19合金薄带的巨磁致伸缩与其大的形状各向异性、熔体快淬时合金内部形成的非对称结构的DO3相及薄带厚度方向[100]择优取向相关

    Abstract:

    Fe81Ga19 alloy ribbons were prepared by melt-spinning. The phase structure and magnetostriction of ribbon samples were investigated by XRD and M-TG. The results show that the matrix of Fe81Ga19 ribbons was disordered Fe(Ga) solid solution, accompanied with a small amount of the second phase maintaining an unsymmetrical DO3 structure. The [100] preferred orientation was formed along the thickness direction. The maximum magnetostricton of –1830×10-6 was obtained when the magnetic field was applied normal to the ribbon plane. The shape anisotropy of ribbons, the unsymmetrical DO3 structure and the [100] preferred orientation are suggested to be responsible for the giant magnetostriction.

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王庆伟,张晶晶,马天宇,严 密.快淬Fe81Ga19合金薄带的相结构和磁致伸缩[J].稀有金属材料与工程,2009,38(7):1234~1237.[Wang Qingwei, Zhang Jingjing, Ma Tianyu, Yan Mi. Phase Structure and Magnetostriction of Fe81Ga19 Melt-Spun Ribbons[J]. Rare Metal Materials and Engineering,2009,38(7):1234~1237.]
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  • 收稿日期:2008-06-19