Dy元素对纳米复合(Nd,Pr)_(10.5-x)Dy_xFe_(83.5)B_6合金磁性能与显微结构的影响（英文）  

Effects of Dy on Magnetic Properties and Microstructure of Nanocomposite (Nd,Pr)_(10.5-x)Dy_xFe_(83.5)B_6 Alloys

作　　者：查五生[1] 周淑容[1,2] 郑浩[2] 吴开霞[1] 袁强[1] 赵新为[3] 

机构地区：[1]西华大学,四川成都610039 [2]四川职业技术学院,四川遂宁629000 [3]日本东京理科大学

出　　处：《稀有金属材料与工程》2015年第4期813-816,共4页Rare Metal Materials and Engineering

基　　金：Spring Sunshine Plan of the Ministry of Education of China(Z2010095);Key Laboratory of Special Materials and Preparation in Sichuan Province(SZJJ2011-013)

摘　　要：采用快淬法制备了镨基(Nd,Pr)10.5-x Dyx Fe83.5B6(x=0.0,0.5,1.0,1.5,2.0,2.5)系列粘结磁体,研究了Dy元素添加对快淬合金显微组织结构、磁性能及快淬薄带热稳定性的影响。与Nd2Fe14B相比,硬磁相Dy2Fe14B具有较高的磁晶各向异性场HA和较低的饱和磁极化强度Js,因此,Dy元素添加能显著提高合金的内禀矫顽力Hcj,但会降低合金的剩磁Br。Dy元素替代Nd/Pr元素,增强了快淬薄带的热稳定性,提高了晶化退火温度。较高的晶化退火温度,使快淬薄带中已经形成的微晶更容易长大,形成一些粗大晶粒,降低了粘结磁体的磁性能。1.0%是较佳的Dy元素添加量,(Nd,Pr)9.5Dy1Fe83.5B6合金快淬粘结磁体的最大磁能积(BH)max为71.6 k J/m3,剩磁Br为0.638 T,内禀矫顽力Hcj为611 k A/m。A series of bonded magnets of （Nd,Pr）10.5-xDyxFe83.sB6 （x=0.0, 0.5, 1.0, 1.5, 2.0, 2.5） alloys were prepared by a melt-spun method. The effects of Dy substitution on the thermal stability of as-spun ribbons, the magnetic properties and microstructures of alloys were investigated. Dy addition will enhance the intrinsic coercivity Hcj greatly, but reduce the remanence Br, because Dy2Fe14B has a higher magnetocrystalline anisotropy field HA and a lower saturation magnetic polarization J compared to those of Nd2Fe14B. The Dy substitution for Nd/Pr enhances the thermal stability and increases the crystallization annealing temperature. The higher annealing temperature leads the fine crystallites existing in as-spun ribbons to easily growing, resulting in appearance of some bigger grains and deterioration of the bonded magnet property. The bonded magnet of （Nd,Pr）9.sDylFe83.5B6 alloy with 1.0at% Dy has optimal magnetic properties, i.e （BH）max=71.6 kJ/m3, Br=0.638 T, and Hcj= 611 kA/m,

关 键 词：纳米复合永磁 快淬 Dy元素 热稳定性 显微结构 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TB33