摘要
比较了Zr,Nb掺杂对Nd8·60Fe80·80Cu0·3Zr2-xNbxB8·30(x=0,1,2)交换耦合纳米复合永磁薄带相组成、显微结构和磁性能的影响.结果表明:Zr和Nb均能有效地抑制晶粒的长大.Zr与B结合生成ZrB2,消耗了合金中部分B元素,导致合金中硬磁性相N2Fe14B含量的减少.与Zr相比,Nb能更有效地抑制晶粒长大,提高样品磁滞回线的方形度.仅掺杂Nb的晶化样品Nd8·60Fe80·80Cu0·3Nb2B8·30具有最佳的磁性能:Br=0·89T,Hci=479·1kA·m-1,(BH)max=107·4kJ·m-3.
ABSTRACT The effects of Zr and Nb dopants on the microstructure and magnetic properties of exchangecoupling nanocomposite Nd8.60Fe80.80Cu0.3Zr2-xNbxB8.30（x=0,1,2） ribbons were systematically studied. It is found that both Zr and Nb dopants can suppress the magnetic grain growth efficiently. The combination of Zr and B consumes partial B and induces to the reduction NzFe14B phases. Comparing to the effect of Zr addition, Nb addition can improve the squareness of the hysteresis loop and suppress the magnetic grain growth more effectively. The optimum magnetic properties were found in the annealed Nd8.60Fe8 0.80Cu0.3Nb2B8.30 ribbons as the following： Br=0.89T,H ci=479.1kA·m^-1,（BH）max=107.4kJ·m^-3.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2006年第4期365-368,共4页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助项目(No.10074005)
关键词
纳米复合永磁
掺杂
显微组织
磁性能
nanocomposite magnets
dopant
microstructure
magnetic properties
