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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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

Received: 20 January 2021 Published: 21 July 2021

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	Articles by authors
	BAI Yang
	WANG Ziliang
	LI Yajing
	ZUO Siyuan
	FANG Yikun
	ZHU Minggang
	HUANG Guangwei
	ZHENG Liyun

Cite this article:

BAI Yang,WANG Ziliang,LI Yajing, et al. Effects of ZrN doping on magnetic properties and electrical resistivity of NdFeB magnets prepared by hot pressing and hot deformation[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 257-262.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I3/257

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