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| Study on the remanufacturing technology for sintered Nd-Fe-B magnets bulk wastes adding Ce |
| MEI Li-ping |
| （Ling Yi iTech （Guangdong） Company， Jiangmen 529000， China） |
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Abstract During the recycling process of sintered Nd-Fe-B magnets， rare earth elements will be oxidized and lost， thus the densification of the recycled magnets is interfered. The addition of Ce metal is helpful to densify the recycled magnet and optimize the microstructure of the magnet. Through the addition of low-cost Ce metal， the comprehensive performance of the recycled magnet was successfully optimized. The hydrogen absorption process of waste sintered Nd-Fe-B magnets was also studied. The magnetic properties of the recycled magnets were tested by BH tester， and the microstructure of the magnet was observed by scanning electron microscopy. The results show that when 4% Ce （ mass percent ） is added， the remanence of the recycled magnet reaches more than 98% of that of the original magnet， and the intrinsic coercivity exceeds that of the original magnet under the conditions of 1 350 K sintering and 773 K heat treatment.
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Received: 05 February 2018
Published: 29 August 2018
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2018, Vol. 28 
