☆ 4.7 Article

Coercivity enhancement of a Ce-based permanent magnet by grain boundary diffusion with Re70Cu30 (Re: Nd/Dy) eutectic alloys

JOURNAL OF ALLOYS AND COMPOUNDS (2020)

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JOURNAL OF ALLOYS AND COMPOUNDS
卷 819, 期 -, 页码 -

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ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152965

关键词

Ce-based permanent magnet; Diffusion; Nd70Cu30 alloy; Magnetic properties

类别

Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

资金

  1. National Natural Science Foundation of China [51901087]
  2. Natural Science Foundation of Jiangsu Province [BK20190975, BK20190977]
  3. National Key Research and Development Program of China [2018YFC0310400]

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Nd70Cu30 and Dy70Cu30 eutectic alloys have been used for the grain boundary diffusion process (GBDP) of a Ce-based permanent magnet, respectively. The coercivity increments (similar to 200 kA/m, 35%) are almost the same after GBDP in spite of the different diffusion sources. The thermal stabilities of remanence and coercivty of the magnet after GBDP with Nd70Cu30 alloy are much higher than that of the magnet after GBDP with Nd70Cu30 alloy. Continuous grain boundary phase was observed for the magnet after GBDP with Nd70Cu30 alloy while the grain boundary phase was less continuous for the magnet after GBDP with Nd70Cu30 alloy. The results indicate that Nd70Cu30 alloy is a promising diffusion source to improve the magnetic properties of Ce-based permanent magnets. (C) 2019 Elsevier B.V. All rights reserved.

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