研究了添加Zr元素对快淬(Nd,Pr)10.5Fe81.5-xZrxCo2B6(x=0,0.5,1.0,1.5,2.0,2.5)合金显微组织结构和磁性能的影响,用AFM观察了合金条带自由表面的显微结构.结果表明:添加Zr元素能显著细化合金的晶粒,从(Nd,Pr)10 5Fe81 5Co2B6合金的～150 nm减小到(Nd,Pr)10.5Fe80Zr1.5Co2B6合金的～50 nm;1%是Zr最佳添加量,低于1%晶粒不够细化,合金的各项磁性能指标均很低,超过1%,富集在晶界处的富Zr晶间相加厚,晶粒间的交换作用和剩磁增强效应减弱,磁体的剩磁Br和最大磁能积(BH)m降低.(Nd,Pr)10.5Fe80.5Zr1Co2B6粘结磁体磁性能最佳:Br=0.675 T,Hci=616 kA·m-1,(BH)m=77 kJ·m-3.
参考文献
| [1] | Schrefl T;Fischer R;Fidler J et al.Two and Three Dimensional Calculation of Remanence Enhancement of Rare Earth Based Composite Magnets[J].Journal of Applied Physics,1994,76(10):7053. |
| [2] | Schrefl T;Fidler J;Kronmuller H .Remanence and Coercivity in Isotropic Nanocrystalline Permanent Magnets[J].Physical Review B,1994,49:6100. |
| [3] | Neu V;Hubert A;Schultz L .Modelling of Enhanced Remanence of Nanocrystalline,Exchange-Coupled Hard Magnetic Grains[J].Journal of Magnetism and Magnetic Materials,1998,189:391. |
| [4] | Kneller E.F.;Hawig R. .The exchange-spring magnet: a new material principle for permanent magnets[J].IEEE Transactions on Magnetics,1991(4):3588-3560. |
| [5] | Betancourt R J I;Davies H A .High Coercivity Zr and Co Substituted (Nd-Pr)-Fe-B Nanophase Hard Magnetic Alloys[J].IEEE Transactions on Magnetics,2001,37(04):2480. |
| [6] | 查五生,刘颖,高升吉,涂铭旌.高矫顽力低稀土含量快淬Pr10.5（FeCoZr）83.5B6粘结磁体制备[J].稀有金属材料与工程,2004(01):75-78. |
| [7] | Harland CL.;Davies HA. .Effect of Co and Zr on magnetic properties of nanophase PrFeB alloys[J].Journal of Applied Physics,2000(9 Pt.3):6116-6118. |
| [8] | Yamasaki M;Hamano M;Mizuguchi H et al.Microstructure of Hard Magnetic bcc Fe/NdFeB Nanocomposite Alloys[J].Scripta Materialia,2001,44:1357. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%