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利用新生钕铁硼粉末原位修复晶界结构制备（钕，铈）-铁-硼再生磁体

Preparation of (Nd, Ce)-Fe-B Regenerated Magnets by In-Situ Restoration of Grain Boundary Structure Using Nascent Nd-Fe-B Powder.

作者信息

Yu Xi, Luo Sangen, Yang Munan, Shen Qingpeng, Yang Honglong, Zhong Shuwei, Zhang Weilong, Yang Bin

机构信息

College of Rare Earths, Jiangxi University of Science and Technology, Ganzhou 341000, China.

Ganzhou Fortune Electronics Co., Ltd., Ganzhou 341000, China.

出版信息

Materials (Basel). 2024 Jul 9;17(14):3381. doi: 10.3390/ma17143381.

DOI:10.3390/ma17143381
PMID:39063673
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11278347/
Abstract

Rare earth resource recycling is an important endeavor for environmental protection and resource utilization. This study explores the method of preparing regenerated magnets using waste magnets as raw materials based on existing processes. By utilizing existing Nd-Fe-B production equipment, various waste magnets are transformed into recycled powder. Next, nascent Nd-Fe-B powders with slightly higher rare earth content are selected as the repairing agent. The regenerated magnets are prepared by incorporating the nascent powder into the recycled powder. The focus lies in investigating the repairing effect of the nascent powder repairing agent on the microstructure of regenerated magnets and exploring the influence of sintering temperature and powder addition on the magnetic properties and microstructure of the regenerated magnets. The results showed that the nascent powder increased the proportion of grain boundary phases and effectively repaired the grain boundary structure of the regenerated magnets. In addition, the Pr element in the nascent powder replaces the Ce element in the recycled powder, which ultimately improves the magnetic properties of the regenerated magnet in a comprehensive manner. This study provides valuable insights and guidance for rare earth resource recycling and the preparation of regenerated magnets.

摘要

稀土资源回收是环境保护和资源利用的一项重要工作。本研究基于现有工艺探索了以废磁体为原料制备再生磁体的方法。利用现有的钕铁硼生产设备，将各种废磁体转化为回收粉末。接下来，选择稀土含量略高的新生钕铁硼粉末作为修复剂。通过将新生粉末掺入回收粉末中来制备再生磁体。重点在于研究新生粉末修复剂对再生磁体微观结构的修复效果，并探索烧结温度和粉末添加量对再生磁体磁性能和微观结构的影响。结果表明，新生粉末增加了晶界相的比例，并有效修复了再生磁体的晶界结构。此外，新生粉末中的镨元素取代了回收粉末中的铈元素，最终全面提高了再生磁体的磁性能。本研究为稀土资源回收和再生磁体的制备提供了有价值的见解和指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/f30ede98dece/materials-17-03381-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/a13b39f7ac74/materials-17-03381-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/191c719e3eb9/materials-17-03381-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/e170d14858d6/materials-17-03381-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/3e2e319c6f42/materials-17-03381-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/b0552d686bfa/materials-17-03381-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/811be41cba14/materials-17-03381-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/f30ede98dece/materials-17-03381-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/a13b39f7ac74/materials-17-03381-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/191c719e3eb9/materials-17-03381-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/e170d14858d6/materials-17-03381-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/3e2e319c6f42/materials-17-03381-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/b0552d686bfa/materials-17-03381-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/811be41cba14/materials-17-03381-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3a8/11278347/f30ede98dece/materials-17-03381-g008.jpg

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本文引用的文献

1
Review on the Parameters of Recycling NdFeB Magnets via a Hydrogenation Process.通过氢化工艺回收钕铁硼磁体的参数综述
ACS Omega. 2023 May 8;8(20):17431-17445. doi: 10.1021/acsomega.3c00299. eCollection 2023 May 23.
2
Commercial-scale recycling of NdFeB-type magnets with grain boundary modification yields products with 'designer properties' that exceed those of starting materials.对具有晶界改性的钕铁硼型磁体进行商业规模回收，可得到具有“定制特性”的产品，其性能超过原材料。
Waste Manag. 2015 Oct;44:48-54. doi: 10.1016/j.wasman.2015.07.041. Epub 2015 Aug 1.