The coercivity enhancement of ball-milled Nd2Fe14B/α-Fe nanocomposite magnets was investigated. It was found that the coerciv- ity could be enhanced through mixing a small amount of Nd powder with as-milled Fe-rich N...The coercivity enhancement of ball-milled Nd2Fe14B/α-Fe nanocomposite magnets was investigated. It was found that the coerciv- ity could be enhanced through mixing a small amount of Nd powder with as-milled Fe-rich Nd-Fe-B powders. The annealed samples were investigated by means of X-ray diffraction, scanning electron microscopy and magnetic measurement systems. Under annealing, some of Nd powders promoted the formation of hard magnetic phase Nd2Fe14B. On the other hand, a few of Nd would diffuse into the interface of Nd2FelaB/α-Fe nanocomposite to compensate for the loss of the interracial magnetic anisotropy. These two features are all beneficial to the coercivity.展开更多
基金Project supported by National Natural Science Foundation of China(51001085,51171148)the State Key Laboratory for Advanced Metals and Materials(2010ZD-03)+2 种基金the Educational Department of Shaanxi Provincial Government(2010JK766)the Doctoral Course Foundation of Ministry of Education of China(20106118120015)Shaanxi Provincial Project of Special Foundation of Key Disciplines
文摘The coercivity enhancement of ball-milled Nd2Fe14B/α-Fe nanocomposite magnets was investigated. It was found that the coerciv- ity could be enhanced through mixing a small amount of Nd powder with as-milled Fe-rich Nd-Fe-B powders. The annealed samples were investigated by means of X-ray diffraction, scanning electron microscopy and magnetic measurement systems. Under annealing, some of Nd powders promoted the formation of hard magnetic phase Nd2Fe14B. On the other hand, a few of Nd would diffuse into the interface of Nd2FelaB/α-Fe nanocomposite to compensate for the loss of the interracial magnetic anisotropy. These two features are all beneficial to the coercivity.
