镨元素对(Nd,Pr)_(10.5)(FeCoZr)_(83.5)B_6合金显微结构和磁性能的影响  

Influence of Substitution of Pr for Nd on Magnetic Properties and Microstructure of Melt-Spun (Nd_(1-x)Pr_x)_(10.5)(FeCoZr)_(83.5)B_6 Alloy

作　　者：刘颖[1] 查五生[1] 高升吉[1] 涂铭旌[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065

出　　处：《中国稀土学报》2003年第6期660-663,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家863计划资助项目(2001AA324030)

摘　　要：研究了稀土元素Pr对快淬(Nd1-xPrx)10.5(FeCoZr)83.5B6(x=0,0.2,0.4,0.6,0.8,1.0)合金显微组织结构和粘结磁体磁性能的影响。通过部分过快淬获得由非晶和微晶共同组成的条屑,在实验优化的退火条件下晶化处理后,制备出最佳磁性能的系列粘结磁体。随Pr含量的增加,磁体的内禀矫顽力Hci单调上升,剩磁Br单调下降,(BH)m在x=0.6～0.8处达到最大值70.6kJ·m-3。Pr元素使合金非晶态的晶化转变温度和转化能降低,合金的显微组织结构变得较粗大和较不均匀,从而使快淬粘结磁体剩磁降低,但Pr2Fe14B化合物较高的磁晶各向异性场使磁体的内禀矫顽力提高。The influence of Pr on thermal stability, microstructure, and magnetic properties of melt-spun (Nd_(1-x)Pr_x)_(10.5)(FeCoZr)_(83.5)B_6(x=0, 0.2, 0.4, 0.6, 0.8, 1.0) bonded magnets was investigated. By sub-overquenching to get the mixture of amorphous and fine crystallites and annealing under the optimum conditions, the bonded magnets with the best magnetic properties were prepared. With the increase of Pr content, H_(ci) increases, but B_r decreases. (BH)_m reaches the maximum of 70.6 kJ·m^(-3) at x=0.6～0.8 for the bonded magnets with 3.25% epoxy. The substitution of Pr for Nd leads the crystallization temperature and crystallization energy to decrease. This difference of thermal stability results in a rougher and more inhomogeneous microstructure, furthermore, leads to the decrease of B_r.

关 键 词：金属材料 镨基永磁材料 Pr含量 磁性能 显微结构 稀土 (Nd Pr)10.5(FeCoZr)83.5B6合金 

分 类 号：TM273[一般工业技术—材料科学与工程]