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快淬Fe81Ga19合金薄帶的相結(jié)構(gòu)和磁致伸縮
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國家自然科學基金(50701039)和新世紀優(yōu)秀人才支持計劃(NCET-05-0526)資助


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

    采用熔體快淬法制備Fe81Ga19合金薄帶，研究薄帶試樣的相結(jié)構(gòu)和磁致伸縮性能。XRD和M-TG結(jié)果表明，快淬態(tài)Fe81Ga19合金基體為Fe(Ga)無序固溶體相，并有微量非對稱結(jié)構(gòu)的DO3相析出，且薄帶厚度方向[100]擇優(yōu)取向。當測量磁場垂直帶面時，薄帶試樣沿帶長方向的飽和磁致伸縮達–1830×10-6。Fe81Ga19合金薄帶的巨磁致伸縮與其大的形狀各向異性、熔體快淬時合金內(nèi)部形成的非對稱結(jié)構(gòu)的DO3相及薄帶厚度方向[100]擇優(yōu)取向相關(guān)

    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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王慶偉,張晶晶,馬天宇,嚴 密.快淬Fe81Ga19合金薄帶的相結(jié)構(gòu)和磁致伸縮[J].稀有金屬材料與工程,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
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