Published October 2021 | Version v1
Journal article Metadata-only

The diffusion behavior and striking coercivity enhancement by Dip-coating TbH3 powders in sintered NdFeB magnets

Creators

  • 1. Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices/Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P. R. (China)
  • 2. School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. (China)
  • 3. Ganzhou Qiandong Rare Earth Group Co, Ltd, Ganzhou 341000, P. R. (China)

Description

Grain boundary diffusion of Tb can improve the microstructural and magnetic properties of NdFeB magnets. In this paper, we investigated diffusion behavior and coercivity enhancement by dip-coating TbH3 powders in sintered NdFeB magnets. The results show that the coercivity increased rapidly from 14.02 kOe to 23.72 kOe after diffusion. Tb atoms diffused to the surface of the magnet and then into the interior, forming a network Tb-rich shell around (PrNd)2Fe14B grains. The higher magnetocrystalline anisotropy (PrNd,Tb)2Fe14B phases determine the coercivity enhancement. The Tb diffusion model was build up from coating layer to the magnet. This work may shed light on developing sintered NdFeB magnets with coercivity enhancement by diffusion technology.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jmmm.2021.168091

Additional details

Identifiers

DOI
10.1016/j.jmmm.2021.168091;
PII
S030488532100367X;

Publishing Information

Journal Title
Journal of Magnetism and Magnetic Materials
Journal Volume
536
Journal Page Range
vp.
ISSN
0304-8853
CODEN
JMMMDC

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
54038329
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ANISOTROPY; COERCIVE FORCE; DIFFUSION; DIP COATING; GRAIN BOUNDARIES; MAGNETIC PROPERTIES; MAGNETS; POWDERS; SURFACES
Descriptors DEC
DEPOSITION; EQUIPMENT; MICROSTRUCTURE; PHYSICAL PROPERTIES; SURFACE COATING

Optional Information

Copyright
Copyright (c) 2021 Elsevier B.V. All rights reserved.