The Nd-Fe-B magnets with Nb addition prepared by a new method exhibit an unusual increase of Br instead of normal monotonous decreasing tendency when the Nb content exceeds 1.75wt.%.The microstructure of these samples...The Nd-Fe-B magnets with Nb addition prepared by a new method exhibit an unusual increase of Br instead of normal monotonous decreasing tendency when the Nb content exceeds 1.75wt.%.The microstructure of these samples were studied,and it u found that the Nd-rich phase,which usually exists in Nd-Fe-B magnets,is very hard to be detected.展开更多
The influence of additive Dy_(2)O_(3)on the magnetic properties of Nd_(16)(Fe_(0.96)Akl_(0.04))_(77)B_(7)has been investigated.It is shown that when the concentration is 4wt%the intrinsic coercivity_(i)H_(c)of the sin...The influence of additive Dy_(2)O_(3)on the magnetic properties of Nd_(16)(Fe_(0.96)Akl_(0.04))_(77)B_(7)has been investigated.It is shown that when the concentration is 4wt%the intrinsic coercivity_(i)H_(c)of the sintered magnets increases to 17850 Oe.展开更多
文摘The Nd-Fe-B magnets with Nb addition prepared by a new method exhibit an unusual increase of Br instead of normal monotonous decreasing tendency when the Nb content exceeds 1.75wt.%.The microstructure of these samples were studied,and it u found that the Nd-rich phase,which usually exists in Nd-Fe-B magnets,is very hard to be detected.
文摘The influence of additive Dy_(2)O_(3)on the magnetic properties of Nd_(16)(Fe_(0.96)Akl_(0.04))_(77)B_(7)has been investigated.It is shown that when the concentration is 4wt%the intrinsic coercivity_(i)H_(c)of the sintered magnets increases to 17850 Oe.