Ce掺杂对Nd-Fe-B快淬薄带结构及磁性能影响  

Effects of Ce-doping on the Structure and Magnetic Properties for Nd-Fe-B Melt-spinning Ribbons

作　　者：张国清 黄有林[1] 侯育花[1] 李志浩 石志强 

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330063

出　　处：《南昌航空大学学报（自然科学版）》2017年第3期67-72,共6页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：国家自然科学基金(51401103;11304146;51564037);江西省自然科学基金(20161BAB206110)

摘　　要：通过熔体快淬技术制备了名义成分为(Nd_(1-x)Ce_x)_(13.5)Fe_(73.5)Co_(6.7)Ga_(0.5)B_(5.6)(x=0.1~0.9)系列薄带,研究发现,不同甩带速率对薄带的磁性能及方形度影响显著,其中甩带速率30 m/s所制薄带的磁性能最佳。随着Ce含量的增加,薄带的矫顽力和剩磁整体呈下降趋势,但在x=0.3时,矫顽力可达1 295 kA/m,呈现反常增加现象,这与物质稀释定律相违背,这可能与Ce的混合价态及其相分离现象有关。这表明Ce在制备低成本高矫顽力稀土永磁中具有较大的应用潜力。The melt-spinning ribbons with a nominal composition of （Nd_（1-x）Ce_x）_（13.5）Fe_（73.5）Co_（6.7）Ga_（0.5）B_（5.6）（ x = 0. 1 ~ 0. 9） were prepared by melt-spinning technique. It was found that the wheel velocity had crucial effects on the magnetic properties and squareness of demagnetization curves. The optimum magnetic properties can be obtained,when the wheel velocity of 30 m/s was adopted. With increasing Ce content,the coercivity and remanence of the ribbons decrease. However,an abnormal increase of Hciwas observed when x = 0. 3,a high coercivity of 1 295 kA/m was achieved. Mixed valence states of Ce and phase separation phenomenon should contribute to the abnormal increase of coercivity. It is indicated that Ce has a great potential value for preparing rare earth permanent magnets with low cost and high coercivity.

关 键 词：熔体快淬 钕铁硼合金 磁性能 高丰度稀土 

分 类 号：TM271[一般工业技术—材料科学与工程]