Realizing texture in bulk nanocrystalline Nd-Fe-B magnet via high-stress low-temperature rapid deformation  

作　　者：Bingning Wei Guosheng Zhang Ping Song Defeng Guo 

机构地区：[1]State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China [2]Key Laboratory for Microstructural Material Physics of Hebei Province,School of Science,Yanshan University,Qinhuangdao 066004,China

出　　处：《Journal of Rare Earths》2023年第5期713-720,I0003,共9页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51931007,51971196,52071279,52101234)。

摘　　要：It is difficult to obtain nanoscale grain size and strong texture in hot-deformed magnets simultaneously,which is responsible for the low magnetic properties of nanocrystalline magnets.In this study,a strong texture was realized in a nanocrystalline Nd-Fe-B magnet via a high-stress low-temperature rapid deformation.Strong texture formation is ascribed to the high stress,which promotes the preferential growth of grains by increasing strain energy anisotropy.The nanocrystalline formation is ascribed to the low deformation temperature(below the melting point of the Nd-rich phase)and short deformation time.The effects of deformation temperature and applied stresses on the microstructure and magnetic properties were investigated in detail.Thus,the highest maximum energy product of 43.3 MGOe is obtained.

关 键 词：Nd-Fe-B magnet Hot deformation Nanoscale grain Crystal texture Magnetic properties Rare earths 

分 类 号：TM273[一般工业技术—材料科学与工程]