Improved processing techniques for high performance NdFeB magnets

BAO Xiaoqian; LI Qinghua; ZHU Xuexin; LI Chengdong; ZHU Jie; ZHANG Maocai; ZHOU Shouzeng

doi:10.13374/j.issn1001-053x.2006.09.010

Volume 28 Issue 9

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Article Navigation > Chinese Journal of Engineering > 2006 > 28(9): 850-853

BAO Xiaoqian, LI Qinghua, ZHU Xuexin, LI Chengdong, ZHU Jie, ZHANG Maocai, ZHOU Shouzeng. Improved processing techniques for high performance NdFeB magnets[J]. Chinese Journal of Engineering, 2006, 28(9): 850-853. doi: 10.13374/j.issn1001-053x.2006.09.010

Citation:

BAO Xiaoqian, LI Qinghua, ZHU Xuexin, LI Chengdong, ZHU Jie, ZHANG Maocai, ZHOU Shouzeng. Improved processing techniques for high performance NdFeB magnets[J]. Chinese Journal of Engineering, 2006, 28(9): 850-853. doi: 10.13374/j.issn1001-053x.2006.09.010

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Improved processing techniques for high performance NdFeB magnets

doi: 10.13374/j.issn1001-053x.2006.09.010

1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing General Research Institute for Nonferrous Metals, Beijing 100088, China

Received Date: 2005-06-08
Rev Recd Date: 2005-09-05

Available Online: 2021-08-24

Abstract

Abstract

A high performance sintered NdFeB magnet with N52 was prepared by strip casting, hydrogen decrepitation, jet milling, rubber isostatic pressing with impulse magnetic field and vibrating. The structure of the magnet was investigated by XRD, optical microscope, TEM and SEM, and its demagnetization curve was tested by magnetograph. The results show that the room-temperature magnetic properties of the Nd_29.0Pr_0.5Ga_0.2Fe_69.1Nb_0.2B_1.0 magnet can reach up to B_r=1.457T,H_ci=1097kÅm^-1,(BH)_max=409kJ·m^-3, with a better homogeneity and consistency.
- sintered NdFeB magnets,
- strip casting,
- hydrogen decrepitation,
- rubber isostatic pressing