Recycling of waste Nd-Fe-B sintered magnets by doping with dysprosium hydride nanoparticles  

作　　者：刘卫强 李超 ZAKOTNIK Miha 岳明 张东涛 黄秀莲 

机构地区：[1]College of Materials Science and Engineering, Beijing University of Technology [2]Earth-panda Advance Magnetic Material Co., Ltd. [3]Anhui Province Key Laboratories of Rare Earth Permanent Magnet Materials

出　　处：《Journal of Rare Earths》2015年第8期846-849,共4页稀土学报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(2012AA063201);National Natural Science Foundation of China(51001002,51371002)

摘　　要：Recycling of waste sintered Nd-Fe-B permanent magnets by doping DyH3 nanoparticles was investigated. The effect of the DyH3 nanoparticles on the microstructure and magnetic properties of the recycled magnets was studied. As the DyH3 nanoparticles additive increased, the coercivity of recycled magnet increased gradually. The recycled magnets with DyH3 nanoparticle content between 0.0 wt.% and 1.0 wt.% maintained the remanence （Br）, but, with higher additions, the Br began to decrease rapidly. The best recycled magnet produced contained 1.0 wt.% of DyH3 nanoparticles when compared to the properties of the starting waste sintering magnet. The Hcj, Br and （BH）max values of 101.7%, 95.4%, and 88.58%, respectively, were recovered.Recycling of waste sintered Nd-Fe-B permanent magnets by doping DyH3 nanoparticles was investigated. The effect of the DyH3 nanoparticles on the microstructure and magnetic properties of the recycled magnets was studied. As the DyH3 nanoparticles additive increased, the coercivity of recycled magnet increased gradually. The recycled magnets with DyH3 nanoparticle content between 0.0 wt.% and 1.0 wt.% maintained the remanence （Br）, but, with higher additions, the Br began to decrease rapidly. The best recycled magnet produced contained 1.0 wt.% of DyH3 nanoparticles when compared to the properties of the starting waste sintering magnet. The Hcj, Br and （BH）max values of 101.7%, 95.4%, and 88.58%, respectively, were recovered.

关 键 词：RECYCLING waste Nd-Fe-B magnet DyH3 nanoparticles magnetic properties rare earths 

分 类 号：TM273[一般工业技术—材料科学与工程] TB383.1[电气工程—电工理论与新技术]