Recycling of SmCo5 magnets by HD process

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:454

Article

Eldosouky, Anas^1,2  Skulj, Irena¹ 

[1] Magneti Ljubljana Dd, Stegne 37, Ljubljana 1000, Slovenia

[2] Jozef Stefan Int Postgrad Sch, Jamova Cesta 39, Ljubljana 1000, Slovenia

关键词: Hydrogen decrepitation;    Rare earth elements;    Recycling;    SmCo magnets;   

DOI  :  10.1016/j.jmmm.2018.01.064

来源: Elsevier

【 摘 要 】

Hydrogen decrepitation process has been applied for the first time for the direct recycling of SmCo5 magnets. Industrially produced sintered SmCo5 magnets were decrepitated by hydrogen gas at a pressure of 1 bar to 9.5 bar at room temperature in a planetary rotating jar. After decrepitation, the starting sintered magnets were reduced to a powder with a particle size of less than 200 mm. The produced powder was used for the preparation of recycled SmCo5 magnets. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction studies and magnetic measurements were used to follow the decrepitation and the sintering processes. The measured remanence and maximum energy product of the recycled magnet are 0.94 T and 171.1 kJ/m(3), respectively, in comparison with 0.91 T and 156.8 kJ/ m(3), respectively for the original magnet before recycling. It was also observed that, there is refinement in the microstructure after recycling in comparison to the original magnet. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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