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添加元素對稀土粘結(jié)磁體退磁曲線方形度的影響
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特種材料及制備技術(shù)四川省高校重點實驗室開放研究基金


Effects of Metal Element Addition on Hysteresis Loop Rectangularity of Bonded Permanent Magnets
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    采用快淬法制備鐠基 (Nd,Pr)10.5(Fe,Co)83.5-xMxB6（M=Zr,Nb,Ti）系列粘結(jié)磁體，研究添加Zr、Nb和Ti等元素對快淬合金顯微結(jié)構(gòu)和磁性能的影響。(Nd,Pr)10.5(Fe,Co)83.5B6合金中適量添加Zr、Nb和Ti元素能有效細(xì)化合金晶粒，獲得細(xì)小、均勻的晶粒，平均晶粒尺寸為50~70 nm。添加Zr、Nb和Ti元素的粘結(jié)磁體，由于晶粒細(xì)化和非磁性相對磁疇疇壁釘扎的共同作用，Hk/Hcj值大幅度增加，退磁曲線方形度得到明顯改善，磁性能也顯著提高。在Zr、Nb和Ti 3種元素中，Zr對細(xì)化晶粒和提高磁性能的效果最好。含1%Zr（原子分?jǐn)?shù)）的 (Nd,Pr)10.5(Fe,Co)82.5Zr1B6合金薄帶晶粒細(xì)小、均勻，平均尺寸約為60 nm，其粘結(jié)磁體退磁曲線方形度最好，Hk/Hcj值達(dá)到了39.9%，剩磁Br為0.675 T，內(nèi)稟矯頑力Hcj為616 kA/m，最大磁能積(BH)m為77 kJ/m3。

    Abstract:

    A series of bonded magnets of (Nd,Pr)10.5(Fe,Co)83.5-xMxB6 (M=Zr, Nb, Ti) alloys were prepared by the melt-spun method. The effects of Zr, Nb and Ti element on the microstructure and magnetic properties of alloys have been investigated. The grains of (Nd,Pr)10.5(Fe,Co)83.5B6 with suitable addition of Zr, Nb, or Ti element are finer and more homogeneous. The average grain size is about 50~70 nm. Due to the combined effect of grains refining and pinning to magnetic domain wall of non-magnetic phases, the demagnetization curve rectangularity is improved notably, and the value of Hk/Hcj and other magnetic properties are also greatly increased for the bonded magnets with Zr, Nb, and Ti element addition. Compared with Nb and Ti, Zr has the best effect on refining the grains and increasing magnetic property. For the (Nd,Pr)10.5(Fe,Co)82.5Zr1B6 alloy with 1% Zr, the grains are ~60 nm and homogeneous, the demagnetization curve rectangularity is the best, the Hk/Hcj reaches to 39.9%, and Br, Hcj, and (BH)m are 0.675 T, 616 kA/m and 77 kJ/m3, respectively.

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查五生,趙 平,劉錦云,寧霞蕊,賈永燦,梁小燕.添加元素對稀土粘結(jié)磁體退磁曲線方形度的影響[J].稀有金屬材料與工程,2012,41(9):1607~1610.[Zha Wusheng, Zhao Ping, Liu Jinyun, Ning Xiarui, Jia Yongcan, Liang Xiaoyan. Effects of Metal Element Addition on Hysteresis Loop Rectangularity of Bonded Permanent Magnets[J]. Rare Metal Materials and Engineering,2012,41(9):1607~1610.]
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  • 收稿日期:2011-09-12
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