Ni对热变形Nd-Fe-B磁体磁性能及力学性能的影响

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Abstract To improve the mechanical properties of hot-pressed/hot-deformed anisotropic Nd-Fe-B magnets, high-melting-point metal element Ni with weak magnetism has been doped into the magnets. The influence of Ni on the magnetic, mechanical properties and microstuctures of the Nd-Fe-B magnets were investigated. The results show that average bending strength of the Ni-doped Nd-Fe-B magnets increases fistly and then decreases with increasing Ni mass fraction from 0 to 5%. The Nd-Fe-B magnet with 2%Ni exhibites the highest average bending strength (212 MPa), and the maximum energy product still retains at more than 40 MGOe. The morphology of the fracture surface of the magnets reveales that the enriched Ni near the pore can strengthen and toughen the grain boundary phase, therefore enhence the crack propagation resistance of grain boundary phase, and improve the bending strength of the magnets.

Key words： Nd-Fe-B Ni doping magnetic property bending strength microstructure

Received: 16 November 2020 Published: 22 March 2021

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	Articles by authors
	ZHANG Yanghu
	HE Hongjiang
	ZUO Zhijun
	SHI Rongying
	LI Jianjun
	ZHAO Lixin
	HUANG Guangwei
	ZHENG Liyun

Cite this article:

ZHANG Yanghu,HE Hongjiang,ZUO Zhijun, et al. Effects of Ni on the magnetic and mechanical properties of hot-deformed Nd-Fe-B magnets[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(1): 40-46.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I1/40

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