期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 498, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2019.166220
关键词
Nd-Fe-B sintered magnet; Hydrogenated addition; Grain-boundary diffusion; Grain-boundary structuring; Microstructure; Hysteretic properties
资金
- Ministry of Education, Youth and Sports of the Czech Republic [LTARF18031]
- Ministry of Education and Science of the Russian Federation [14.616.21.0093, RFMEFI61618X0093]
High-coercivity Nd-Fe-B magnets are required for clean energy applications, particularly for hybrid and electric vehicles. This study was focused on the structural design of a Nd2Fe14B-based magnet by precise engineering of its microstructure, which included grain-boundary diffusion and grain-boundary structuring processes, through the introduction of a hydrogenated Tb3Co0.6Cu0.4Hx composition in the powder mixture. A low-rare-earth-metal strip-cast Nd-24.0, Pr-6.5, Dy-0.5, B-1.0, Al-0.2, Fe-balance (wt.%) alloy was used as the base component of the powder mixture. The distributions of the components of the blended powder mixture in the sintered magnet with the added 2 wt% of Tb3Co0.6Cu0.4Hx and stability of the structure-sensitive magnetic parameter (coercive force) during a low-temperature heat treatment were studied. The sample exhibited a high coercive force up to 1480 kA/m at a heavy rare-earth element content in the 2-14-1 phase of similar to 1 at.%.
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