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[1]潘为茂a,刘仁辉b,周头军b,等.烧结Nd-Fe-B磁体晶界扩散TbH2高温稳定性及其机理[J].有色金属科学与工程,2020,(03):109-114.[doi:10.13264/j.cnki.ysjskx.2020.03.015]
 PAN Weimaoa,LIU Renhuib,ZHOU Toujunb,et al.Study on the high-temperature stability and mechanism of sintered Nd-Fe-B magnet by the grain boundary diffusion of TbH2[J].,2020,(03):109-114.[doi:10.13264/j.cnki.ysjskx.2020.03.015]
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烧结Nd-Fe-B磁体晶界扩散TbH2高温稳定性及其机理(/HTML)
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《有色金属科学与工程》[ISSN:1674-9669/CN:36-1311/TF]

卷:
期数:
2020年03期
页码:
109-114
栏目:
出版日期:
2020-05-20

文章信息/Info

Title:
Study on the high-temperature stability and mechanism of sintered Nd-Fe-B magnet by the grain boundary diffusion of TbH2
文章编号:
1674-9669(2020)03-0109-06
作者:
潘为茂1a 刘仁辉1b 周头军1b 屈鹏鹏1a 陶力1a陈久昌2 邱建民2 钟震晨1b
(1. 江西理工大学,a.材料冶金化学学部; b. 江西省稀土磁性材料及器件重点实验室,江西 赣州341000;2. 赣州嘉通新材料有限公司, 江西 赣州341000)
Author(s):
PAN Weimao1a LIU Renhui1b ZHOU Toujun1b QU Pengpeng1a TAO Li1a CHEN Jiuchang2 QIU Jianmin2 ZHONG Zhenchen1b
(1a. Faculty of Materials Metallurgy and Chemistry; 1b. Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices, Jiangxi University of Science and Technology, Ganzhou 341000, China;2. Ganzhou Jiatong New Material Co., Ltd.,Ganzhou 341000, China)
关键词:
烧结钕铁硼晶界扩散磁通不可逆损失矫顽力提升机理
分类号:
TF845;TG146.45
DOI:
10.13264/j.cnki.ysjskx.2020.03.015
文献标志码:
A
摘要:
采用涂敷方式,在烧结钕铁硼表面均匀涂敷TbH2粉末,经过不同的扩散温度处理,制备出晶界扩散磁体。研究了晶界扩散TbH2对烧结Nd-Fe-B磁体常温磁性能及高温稳定性的影响,并分析了磁体矫顽力提升的机理。常温磁性能研究表明,扩散磁体经过890 ℃+490 ℃工艺处理后性能达到最优,矫顽力从1 383 kA/m提升到1 988 kA/m。高温磁性能结果显示,扩散磁体200 ℃的矫顽力温度系数|β|比原始磁体降低0.032%/℃,磁通不可损失hirr比原始磁体降低21.47%,扩散TbH2明显提高了烧结Nd-Fe-B磁体的热稳定性。分析得出,晶界扩散TbH2磁体矫顽力提升的机理是Nd2Fe14B晶粒外延层形成了(Tb,Nd)2Fe14B核壳结构,提高了磁晶各向异性场;同时改善了磁体的微观组织结构,有效地隔绝了晶粒之间的磁交换耦合作用。

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备注/Memo

备注/Memo:
收稿日期:2020-03-27
基金项目:国家自然科学基金资助项目(51661011);江西省重点研发计划资助项目(20192ACB50022)
通信作者:刘仁辉(1985— ),男,讲师,主要研究方向稀土永磁材料制备。E-mail:398333487@qq.com
更新日期/Last Update: 2020-07-03