Relation between microstructure and magnetic properties of shock wave-compressed Nd-Fe-B magnets  

作　　者：Ming-Gang Zhu Yan-Feng Li Wei Li Li-Yun Zheng Dong Zhou Hai-Bo Feng Lang Chen An Du 

机构地区：[1]Division of Functional Materials,Central Iron and Steel Research Institute,Beijing 100081,China [2]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China [3]College of Science,Northeastern University,Shenyang 110819,China

出　　处：《Rare Metals》2022年第7期2353-2356,共4页稀有金属（英文版）

基　　金：financially supported by the National High Technology Research and Development Program of China (No. 2011AA03A401);the National Basic Research Program of China (No. 2014CB643701);the National Natural Science Foundation of China (Nos. 51171049 and 51271060);the National Key Technology R&D Program (No. 2012BAE02B01)

摘　　要：The relationship between the microstructure and magnetic properties of Nd-Fe-B sintered magnet compressed by shock wave with 6.26 GPa≤p≤7.16 GPa was investigated.It reveals that Nd-Fe-B magnets show a demagnetization behavior after compressed by shock wave.The intergranular fracture is the main occurring phe-nomenon in the shock wave-compressed magnets.The coercivity of the shock wave-compressed Nd-Fe-B magnets could be recovered after repeating the annealing process.It suggests that only the morphology change just like the intergranular fracture occurs,and there is no structural change in the grain boundary phase in the shock wave-compressed magnet.Matrix phase grain interconnection,microcracks and pores,and alterant orientation relationship between matrix phase and grain boundaries phase are con-sidered as induced factors of demagnetization.

关 键 词：Permanent magnets COERCIVITY Shock wave DEMAGNETIZATION 

分 类 号：TM273[一般工业技术—材料科学与工程]