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利用熔旋快淬方法在辊速为40 m/s时制备了低B的Fe85-xNb6.8B7.7Cu3(x=0,1,3)快淬态薄带.Fe85Nb6.8B7.7和Fe85Nb6.8B7.7Cu1快淬态薄带具有α-Fe纳米晶结构,α-Fe的晶粒尺寸分别为23 nm和20 nm,Fe85Nb6.8B7.7快淬态薄带中还出现少量的杂相,但两者的软磁特性很差.而Fe85-xNb8B7.7Cu36.快淬态薄带的α-Fe的晶粒尺寸为13 nm,在磁场20 Oe,频率1 kHz下相对磁导率的变化为△μ/μ((0)=-44%,磁场90 Oe下交流频率为1.5 MHz时磁阻抗△Z/Z0=-31.3%,显示了良好的软磁材料特点.

参考文献

[1] Suzuki K et al.High saturation magnetization and soft magnetic properties of bce Fe-Zr-B and Fe-Zr-B-M (M= transition metal) alloys with nanoscale grain size[J].Materials Transactions-Japan Institute of Metals,1991,32:93.
[2] Makino A et al.Nanoerystalline soft magnetic Fe-M-B (M=Zr,Hf,Nh) alloys and their applications[J].Materials Science and Engineering,1997,A226-228:594.
[3] Makino A et al.Nb-poor Fe-Nb-B nanocrystalinne soft magnetic alloys with small amount of P and Cu prepared by melt-spinning in air[J].Scripta Materialia,2003,48:869.
[4] 张瑞,胡季帆,李波,秦宏伟,喻晓军,黎伦,成彬,李登涛.FeNbBCu快淬薄带中的巨磁阻抗效应[J].金属功能材料,2008(05):8-10.
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