钆对烧结钕铁硼磁体磁性能和相结构的影响  

Influence of Substitution of Gd for Nd on Microstructure and Properties of Sintered Nd-Fe-B Magnets

作　　者：刘国征[1,2] 赵明静[3] 赵瑞金[1] 刘小鱼[1] 鲁富强[3] 李波[2] 

机构地区：[1]包头稀土研究院功能材料研究中心,内蒙古包头014030 [2]钢铁研究总院安泰功能材料事业部,北京100083 [3]稀土冶金及功能材料国家工程研究中心功能材料工程化实验室,内蒙古包头014030

出　　处：《稀有金属》2010年第1期121-124,共4页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(50761001)资助

摘　　要：通过电弧炉冶炼合金,采用球磨制粉,在磁场下取向成型,真空烧结和热处理制备了Nd17-xRxFe76.5B6.5磁体,研究了在钕铁硼永磁体中用稀土Gd部分地代替钕时对永磁体的磁性能随Gd含量的变化。实验结果表明:在一定的烧结及热处理工艺条件下,Nd17-xRxFe76.5B6.5磁体在Gd含量小于5%(原子分数)时,Gd对磁体的剩磁和内禀矫顽力影响相对较小,当Gd含量>5%时,磁体磁性能急剧下降。显微成分分析表明,在合金铸态下,Gd可抑制合金的α-Fe相的析出;在磁体中,Gd进入主相是降低磁体矫顽力的主要原因。The influence of substitution of Gd for Nd on microstructure and properties of Nd17-xRxFe76.5B6.5(x=0~12) magnets was investigated. Alloys with the composition of Nd17-xRxFe76.5B6.5 were smelted into ingots in electric arc furnace in Ar gas. Powders were obtained by ball-milling and were oriented in a magnetic field magnet and pressed under pressure,and then sintered and annealed in vacuum environment. The results showed that the remanence and intrinsic coercivity decreased slowly for Nd17-xRxFe76.5B6.5,whe...

关 键 词：钕铁硼 磁性能 相结构 钆 

分 类 号：TM273[一般工业技术—材料科学与工程]