Hard magnetic properties of Fe-Nd-B alloys containing intergranular amorphous phase
Hard magnetic properties of Fe-Nd-B alloys containing intergranular amorphous phase
复制标题
晶间非晶相Fe-Nd-B合金的硬磁性能
DOI：
10.1109/20.489590
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发表时间：
1995
影响因子：
2.1
通讯作者：
T. Masumoto
中科院分区：
文献类型：
--
作者：
A. Inoue;A. Takeuchi;A. Makino;T. Masumoto
在923-1023 K下退火60-300 s的含88 - 90 at% Fe的富Fe Fe-Nd-B非晶合金具有由bcc-Fe、Fe/sub 14/Nd/sub 2/B和剩余非晶相组成的纳米结构，并表现出相当好的硬磁性能，对于Fe/sub 89/Nd/sub 7/B/sub 4/，剩磁（Br）为1.28 T，矫顽场（iHc）为252 kA/m，最大能量积（（BH）/sub max/）为146 kJ/m/sup 3/。纳米Fe/sub 14/Nd/sub 2/B颗粒的尺寸约为30 nm，被bcc-Fe和非晶相包围，充当磁交换耦合介质。三种铁磁相的纳米级共存对于获得较好的硬磁性能是重要的。对于含有约90原子% Fe的富Fe合金，同时实现高Br和（BH）/sub max/值以及非晶相的残余存在具有显著的工程重要性，因为期望高变形性和低成本。
Fe-rich Fe-Nd-B amorphous alloys containing 88 to 90 at% Fe annealed for 60-300 s at 923-1023 K have the nanostructure consisting of bcc-Fe, Fe/sub 14/Nd/sub 2/B and remaining amorphous phases, and exhibit rather good hard magnetic properties, i.e., remanence (Br) of 1.28 T, coercive field (iHc) of 252 kA/m and maximum energy product ((BH)/sub max/) of 146 kJ/m/sup 3/ for Fe/sub 89/Nd/sub 7/B/sub 4/. The nanoscale Fe/sub 14/Nd/sub 2/B particles with a size of about 30 nm are surrounded by the bcc-Fe and amorphous phases which act as a magnetic exchange-coupled medium. The nanoscale coexistence of the three ferromagnetic phases is important for the achievement of the rather good hard magnetic properties. The simultaneous achievement of the high Br and (BH)/sub max/ values and the residual existence of the amorphous phase for the Fe-rich alloys containing about 90 at% Fe has significant engineering importance because of the expectations of high deformability and low cost.