采用单辊快淬法制备了Nd12.3-xDyxFe79.7Zr0.8Nb0.8Cu0.4B6.0(x=0,0.5,1.5,2.5)合金纳米晶单相永磁薄带,研究了合金薄带晶化处理后,成分、组织结构与磁性能之间的关系.X射线衍射分析(XRD)表明,淬态合金主要由非晶相和Nd2Fe14B相组成,完全晶化后由Nd2Fe14B相和少量α-Fe组成.高分辨透射电镜(HRTEM)分析表明,经充分退火后,Nd2Fe14B晶体完整,晶粒间几乎没有边界相.随着Dy含量增加,晶粒尺寸细化,矫顽力大幅提高.x=0.5合金综合磁性能最佳,经过700℃晶化处理10min后,其磁性能为Jr=1.09 T,Hci=1048kA·m-1,(BH)max=169.5 kJ·m-3.
参考文献
| [1] | Ghidini M;Asti G;Pellicelli R;Pemechele C Solzi M .Hardsoft composite magnets[J].Journal of Magnetism and Magnetic Materials,2007,316:159. |
| [2] | Chiriac H;Lupu N;Stoleriu L;Postolache P Stancu A .Experimental and micromagnetic first-order reversal curve,analysis in NdFeB-based bulk "exchange spring"-type permanent magnets[J].Journal of Magnetism and Magnetic Materials,2007,316:177. |
| [3] | Brown D N;Chert Z;Guschl P;Campbdl P .Developments with melt spun RE-Fe-B powder for bonded magnats[J].Journal of Magnetism and Magnetic Materials,2006,303:e371. |
| [4] | gwan H W;Hedjipanayis G C .Magnetic and microstructural study of hybrid magnet consisting of R-rich and R-lean Nd-Fe-B alloys[J].Journal of Magnetism and Magnetic Materials,2007,310:2575. |
| [5] | Miao WF.;Mccormick PG.;Street R.;Ding J. .MAGNETIC BEHAVIOUR OF MECHANICALLY MILLED (ND1-XDYX)(8)FE88B4[J].Journal of Magnetism and Magnetic Materials,1997(3):304-310. |
| [6] | Fang X.;Shi Y. .Modeling of magnetic properties of heat treated Dy-doped NdFeB particles bonded in isotropic and anisotropic arrangements[J].IEEE Transactions on Magnetics,1998(4):1291-1293. |
| [7] | Kim S.G.;Kim M.J. .Effects of Dy on magnetic properties of a-Fe/Nd/sub 2/Fe/sub 14/B type alloy[J].IEEE Transactions on Magnetics,1999(5):3316-3318. |
| [8] | Liu Z W;Davies H A .Eleveted temperature study of nanecrystalline (Nd/Pr)-Fe-B hard magnetic alloys with Co and Dy additions[J].Journal of Magnetism and Magnetic Materials,2005,290-291:1230. |
| [9] | 刘丽妹,史艳晶,赵喜梅,聂莉莹,李爱君,胡金江,陈伟.纳米复合材料（Nd0.7Dy0.3）8Fe87B5的磁性能和居里温度[J].河北师范大学学报（自然科学版）,2005(04):361-363. |
| [10] | Jang T;Kim Y S .Effect of small dysprosium additions an the coercivity of malt-spun Nd-Fe-C alloys[J].IEEE Transactions on Magnetics,1999,36(05):3310. |
| [11] | Sagawa M;Fujimura S;Yamameto H Y.Magnetic properties and microstructure of rare earth-iron-boron permanent magnet materials[A].Dayton,Ohio,1985:587. |
| [12] | Buschow K H J .New developments in hard magnetic materials[J].Reports on Progress in Physics,1991,54:1123. |
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%