纳米晶复合Nd10Fe86-XBXNb4 (x = 6.5~22)永磁合金磁性能的研究
Study on Magnetic Properties of Nanocomposite Nd10Fe86-XBXNb4 (x = 6.5 - 22) Permanent Alloys

作者: 谭晓华 * , 徐 晖 * , 陶雪云 :上海大学微结构重点实验室;

关键词: 纳米晶复合磁性能交换耦合作用Nanocomposite Magnetic Properties Exchange Coupling Effect

摘要:
在纳米晶复合Nd10Fe86−xBxNb4 (x = 6.5~22)合金中,B含量的变化对合金磁性能有重要影响。B元素的含量变化可以调整合金软、硬磁相的相对含量,适量的B含量可以使合金中软、硬磁性相间的交换耦合作用增强,从而提高合金的综合磁性能;过量的B元素的添加增加了合金中非磁性相的含量,导致了合金的综合磁性能的下降。B含量为10 at%的合金在退火温度为690,退火时间为4 min时具有最佳的磁性能,为:jHc = 936.0 kA/mBr = 0.91 T(BH)max = 125.9 kJ/m³

Abstract:
For the Nd10Fe86−xBxNb4 (x = 6.5 - 22) nanocomposite permanent alloys, the relative content of the soft magnetic phase and the hard magnetic phase is sensitive to B addition. Proper B addition can enhance the exchange coupling effect between soft and hard magnetic phases, resulting in improving the magnetic properties. More addition of B promotes the formation of non-magnetic phases which degrades the magnetic properties of the Nd10Fe86−xBxNb4 (x = 6.5 - 22) alloys. When B = 10 at%, optimal magnetic properties can be obtained. That is, jHc =936.0 kA/m, Br = 0.91 T and (BH)max = 125.9 kJ/m³ for the Nd10Fe76B10Nb4 alloy annealed at 690˚C for 4 minutes. It is due to the enhancement of exchange coupling effect between soft and hard magnetic phases.

文章引用: 谭晓华 , 徐 晖 , 陶雪云 (2013) 纳米晶复合Nd10Fe86-XBXNb4 (x = 6.5~22)永磁合金磁性能的研究。 材料科学, 3, 91-94. doi: 10.12677/MS.2013.32017

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