The results indicate that the nucleation in the soft magnetization regions located at the surface of hard magnetic grains, as well as the irreversible domain wall displacement from the surface to the inside of grains are the dominant factors controlling the intrinsic coercivity of Nd-Fe-B alloy. 结果表明,主相晶粒表面软磁性区成核及从表面向晶粒内部不可逆畴壁位移对Nd-Fe-B合金的矫顽力起决定性作用。
The behavior of the reduced remanence, the intrinsic coercivity and the change of maximum magnetic energy product with the grain size, a, and the content of the soft phase, fm, have been studied. 并且研究了约化剩磁、内禀矫顽力和最大磁能积随晶粒尺寸a和软磁相含量fm的变化。
The results of the experiments show that aging treatment has no influence on sample's density and remanence, but has great influence on intrinsic coercivity and magnetic energy products. 实验结果表明:时效处理对同一成分合金的密度和剩磁基本没有影响,对矫顽力和磁能积有较大影响;
The addition of Cr element shows to be significantly advantageous in increasing the intrinsic coercivity and maximum magnetic energy product. 添加Cr元素可提高内禀矫顽力,从而提高最大磁能积。
Aluminum was found to have the effect on increasing the intrinsic coercivity of Nd-B-Fe magnet. 铝具有提高Nd-B-Fe磁体内禀矫顽力的效果。
Intrinsic coercivity at low temperatures in nd_2 ( fe_ ( 1-x) mn_x)_ ( 14) b Nd2(Fe(1-x)Mnx)(14)B的低温内禀矫顽力
When sintering temperature is 1 373 K, with the prolongation of sintering holding time, remanence ( Br) raises afterwards steady, but intrinsic coercivity ( Hci) drops dramatically. 当烧结温度为1373K时,随烧结保持时间延长,材料剩磁Br先增加后趋于稳定,矫顽力Hci直线下降。
The intrinsic coercivity of sintered Nd-Fe-B magnets with Nb addition can be greatly improved by annealing treatment, and annealing treatment has little effect on maximum energy product of sintered magnets. 回火处理能够极大地提高添加Nb后的烧结Nd-Fe-B磁体的矫顽力,而对其最大磁能积的影响不大。
Due to the reduced proportion of crystalline particles and nice magnetic orientation degree, high performance magnetic materials can be prepared. Meanwhile single-crystal particles which is also conducive to inhibit the formation of anti-magnetic core can improve the intrinsic coercivity. 粉体粒度小可以避免多晶颗粒的比例,提高磁粉的取向度,同时单晶颗粒也有利于抑制反磁化核的形成,提高内禀矫顽力。