首页|Improvements in properties of NdFeB magnets obtained via magnetron sputtering and thermal diffusion

Improvements in properties of NdFeB magnets obtained via magnetron sputtering and thermal diffusion

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The grain boundary diffusion process(GBDP)of Dy and DyAl on sintered NdFeB magnets was conducted via magnetron-sputtering deposition of Dy and DyAl films to enhance coercivity(Hcj).The magnetic properties,microstructure and anti-corrosion properties of Dy-surface-alloying NdFeB magnets obtained via magnetron sputtering and thermal diffusion were evaluated.The Hcj of the Dy95Al5-NdFeB magnet increases by 32.68％,while the remanence declines slightly.Furthermore,X-ray diffraction and micro-structural analysis confirm the formation of Dy-rich shells,the higher-magnetic-anisotropy field of hard(NdxDy1-x)2(FeAl)14B magnetic phases and an optimised grain boundary structure,contributing to the Hcj enhancement of the magnet.The elemental distribution and diffusion mechanism of the magnets are also discussed.Moreover,the corrosion resistance of the Dy95Al5-NdFeB magnet is substantially improved by enhancing the electrochemical stability and optimising the distribution and morphology of the intergranular phases.The findings of this study are of substantial importance in the development of low-heavy rare-earth sintered NdFeB magnets.

Magnetron sputteringNdFeBRare earthsMicrostructureMagnetic propertyCorrosion resistance

Jin Tang、Weichao Huang、Dan Li

展开 >

School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou,545006,China

China Rare Earth(Guangxi)Jinyuan Rare Earth New Materials Co.,Ltd.,Hezhou,542603,China

China Rare Earth Group Co.,Ltd.,Ganzhou,341000,China

Center of Experimental Teaching for Common Courses,Panzhihua University,Panzhihua,617000,China

展开 >

National Key Research and Development Program"Rare Earth New materials"Key ProjectGuangxi Science and Technology Base and Talent Special Project

2022YFB3505400Guike-AD19245013

2024

10.1016/j.jre.2023.09.002

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(9)
  • 1