Structural and magnetic engineering of (Nd, Pr, Dy, Tb)–Fe–B sintered magnets with Tb3Co0.6Cu0.4Hx composition in the powder mixture
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-bounda...
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Published in | Journal of magnetism and magnetic materials Vol. 498; p. 1 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.03.2020
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | 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 ~1 at.%. |
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ISSN: | 0304-8853 1873-4766 |
DOI: | 10.1016/j.jmmm.2019.166220 |