ZrN掺杂对热压-热变形制备钕铁硼磁体磁性能和电阻率的影响

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摘要以NdFeB粉和ZrN粉为原料,通过真空热压烧结与热压变形,制备ZrN掺杂量(质量分数)为0~5%的NdFeB磁体,研究ZrN掺杂对NdFeB磁体密度、电阻率与磁性能的影响。结果表明,随w(ZrN)增大,热压烧结态磁体的密度先增加后降低;热压变形后的NdFeB磁体,中心部位的磁性能最佳,沿径向逐渐变差,并且随w(ZrN)增加,磁体的电阻率增大,但磁性能整体下降较明显。w(ZrN)为1%的热变形磁体具有较好的磁性能,剩磁为1.362 T,矫顽力为865.5 kA/m,最大磁能积为349.6 kJ/m³,同时电阻率达到250 μΩ∙cm,比未掺杂NdFeB磁体的电阻率(230 μΩ∙cm)提高8.7%,达到作为稀土永磁电机中转子的使用要求。

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	白杨
	王梓良
	李雅婧
	左思源
	方以坤
	朱明刚
	黄光伟
	郑立允

关键词 ： NdFeB磁体, ZrN掺杂, 电阻率, 磁性能, 密度

Abstract：NdFeB magnets with different mass fractions of ZrN were prepared by mixing ZrN and NdFeB melt quenching powder evenly, followed by hot pressing and hot deformation. The effects of ZrN doping on the hot pressing density, magnetic properties, uniformity and electrical resistivity of the hot pressed and hot deformed NdFeB magnets were studied. The results show that the magnetic properties in the interior of the hot pressed magnet are the best, which gradually deteriorate along the radial direction. With the increase of the mass fraction of ZrN, the density of the hot pressed magnets increases first and then decreases. The electrical resistivity of the hot deformed magnets gradually increases with the mass fraction of ZrN, while the magnetic properties decrease linearly. When the mass fraction of ZrN is 1%, the remanence magnetization, the coercivity, the maximum magnetic energy product are 1.362 T, 865.5 kA/m and 349.6 kJ/m³, respectively. And the resistivity is 250 μΩ∙cm. Compared with that of the undoped hot deformed NdFeB magnet (230 μΩ∙cm), the resistivity of the doped NdFeB magnet increases by about 8.7%.

Key words： NdFeB magnet ZrN doping resistivity magnetic properties density

收稿日期: 2021-01-20 出版日期: 2021-07-21

ZTFLH:

TM273

基金资助:河北省高等学校科学技术研究项目(QN2019040); 河北省科技厅中央引导地方科技发展资金资助项目(206Z1007G); 河北省重点研发计划资助项目(19211008D,18211904D)

通讯作者: 郑立允,教授,博士。电话：13832064901;E-mail: zhengliyun@126.com

引用本文:

白杨, 王梓良, 李雅婧, 左思源, 方以坤, 朱明刚, 黄光伟, 郑立允. ZrN掺杂对热压-热变形制备钕铁硼磁体磁性能和电阻率的影响[J]. 粉末冶金材料科学与工程, 2021, 26(3): 257-262.
BAI Yang, WANG Ziliang, LI Yajing, ZUO Siyuan, FANG Yikun, ZHU Minggang, HUANG Guangwei, ZHENG Liyun. Effects of ZrN doping on magnetic properties and electrical resistivity of NdFeB magnets prepared by hot pressing and hot deformation. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 257-262.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I3/257

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