Manufacture of Anisotropic NdFeB Powders Process from Sintered Magnets by HD

QIANG Wenjiang; TANG Hong; SUN Aizhi

doi:10.13374/j.issn1001-053x.2004.03.015

Volume 26 Issue 3

Aug. 2021

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QIANG Wenjiang, TANG Hong, SUN Aizhi. Manufacture of Anisotropic NdFeB Powders Process from Sintered Magnets by HD[J]. Chinese Journal of Engineering, 2004, 26(3): 285-288. doi: 10.13374/j.issn1001-053x.2004.03.015

Citation:

QIANG Wenjiang, TANG Hong, SUN Aizhi. Manufacture of Anisotropic NdFeB Powders Process from Sintered Magnets by HD[J]. Chinese Journal of Engineering, 2004, 26(3): 285-288. doi: 10.13374/j.issn1001-053x.2004.03.015

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Manufacture of Anisotropic NdFeB Powders Process from Sintered Magnets by HD

doi: 10.13374/j.issn1001-053x.2004.03.015

Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083

Received Date: 2003-07-29
Available Online: 2021-08-16

Abstract

Abstract

A manufacture method of anisotropic NdFeB magnet powders was investigated from sintered bulk magnets by hydrogen decrepitation (HD process): it is found that HD temperature plays a very important role affecting the coercivity of the obtained magnetic powders evidently. This temperature determines the fracture way of bulk magnets during HD process as well. In intergranular fracture way through properly controlled HD temperature, at 220 ℃ for instance, anisotropic magnet powders with a coercivity up to 490 kA/m are obtained after a following annealing treatment at 950 ℃.
- sintered NdFeB magnet,
- anisotropic magnet powder,
- HD process,
- coercivity