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[1]屈鹏鹏a,b,曾亮亮a,等.晶界扩散Dy–Al–Ga对钕铁硼磁体的磁性能和微观组织的影响[J].有色金属科学与工程,2019,(03):64-68.[doi:10.13264/j.cnki.ysjskx.2019.03.011]
 QU Pengpenga,b,ZENG Lianglianga,et al.Effect of grain boundary diffusing Dy-Al-Ga on the microstructure and magnetic properties of NdFeB magnets[J].,2019,(03):64-68.[doi:10.13264/j.cnki.ysjskx.2019.03.011]
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晶界扩散Dy–Al–Ga对钕铁硼磁体的磁性能和微观组织的影响(/HTML)
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《有色金属科学与工程》[ISSN:1674-9669/CN:36-1311/TF]

卷:
期数:
2019年03期
页码:
64-68
栏目:
出版日期:
2019-05-20

文章信息/Info

Title:
Effect of grain boundary diffusing Dy-Al-Ga on the microstructure and magnetic properties of NdFeB magnets
文章编号:
1674-9669(2019)03-0064-05
作者:
屈鹏鹏ab 曾亮亮ab 黄祥云ab 何磊ab 杜畅ab 李家节b
(江西理工大学, a.材料科学与工程学院,b.江西省稀土磁性材料及器件重点实验室,江西 赣州 341000)
Author(s):
QU Pengpengab ZENG Liangliangab HUANG Xiangyunab HE Leiab DU Changab LI Jiajieb
(a. School of Materials Science and Engineering; b. Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices, Jiangxi University of Science and Technology, Ganzhou 341000, China)
关键词:
晶界扩散低熔点合金烧结钕铁硼矫顽力
分类号:
TF802.67;TM27
DOI:
10.13264/j.cnki.ysjskx.2019.03.011
文献标志码:
A
摘要:
通过晶界扩散Dy70Al10Ga20合金研究了烧结Nd–Fe–B磁体的磁性能和热稳定性能. 用NIM-500C高温永磁测量仪和MLA650扫描电镜测出了磁体在扩散前后的磁性能和微观组织的变化. 结果表明,在Dy70Al10Ga20合金扩散热处理后,磁体矫顽力从原始的1 080.968 kA/m显著提升到1 671.600 kA/m,提升幅度约为55 %,而剩磁下降很少. Dy、Al、Ga元素在晶界处扩散,很好地隔绝了磁交换作用,提升矫顽力. SEM图显示在扩散Dy70Al10Ga20合金后,可以很明显地看到晶粒外延层有一层灰色的壳层包覆着主相晶粒,很好地起到了隔离晶粒的磁交换作用. XRD显示主相的峰普遍往右偏移,这归因于重稀土元素Dy进入晶粒外延层形成(Nd,Dy)2Fe14B核壳结构. Dy的原子半径比Nd小,导致峰往右移.

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备注/Memo

备注/Memo:
收稿日期:2019-01-04
基金项目:国家自然科学基金资助项目(51561009)
通信作者:李家节(1981- ),男,副教授,主要从事磁性材料结构和物性、先进制备技术的特性研究,E-mail:lifest@163.com.
更新日期/Last Update: 2019-06-25