采用铜模吸铸及随后的退火处理制备了厚度为0.8 mm,成分为Nd9Fe83-xTi4C4Bx(x=10 ～15)的Nd2Fe14B/Fe3B型纳米复相磁体,对其组织演变和磁性能进行了研究.结果表明:在铸态合金中,x=10的合金微观组织主要由Nd2Fe14B,Fe3B,α-Fe和TiC相构成.而x=11 ～15的合金中除含上述各相外,还出现了Nd2Fe23B3相、未知相和非晶相,且随着B含量的增加,它们在合金中的相对含量有不同程度的增加;退火过程中,随着合金中亚稳相和非晶相的转化,Nd2Fe14B,Fe3B和α-Fe相对含量增加,但不同B含量合金的相结构变化差异明显,导致退火后磁体具有不同的磁性能.其中,x =12的合金在680℃退火5 min后获得了最佳磁性能:Br=0.63 T,iHc =98.12 kA·m-1,(BH)max=22.79 kJ·m-3.
参考文献
| [1] | Wei Zhang;Akihisa Inoue .Bulk nanocomposite permanent magnets produced by crystallization of (Fe,Co)-(Nd,Dy)-B bulk glassy alloy[J].Applied physics letters,2002(9):1610-1612. |
| [2] | Zhang W.;Inoue A. .Bulk nanocomposite permanent magnets produced by crystallization of Fe66.5Co10Pr3.5B20 bulk glassy alloy[J].Journal of Applied Physics,2002(10 Pt.3):8834-8836. |
| [3] | P. Pawlik;H. A. Davies .Glass formability of Fe-Co-Pr-Dy-Zr-B alloys and magnetic properties following devitrification[J].Scripta materialia,2003(8):755-760. |
| [4] | Marinescu M;Chiriac H;Grigoras M .Magnetic properties of bulk nanocomposite permanent magnets based on NdDyFeB alloys with additions[J].Journal of Magnetism and Magnetic Materials,2005,290-291:1267. |
| [5] | Tan XH;Xu H;Bai Q;Zhao WJ;Dong YD .Magnetic properties of Fe-Co-Nd-Y-B magnet prepared by suction casting[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2007(4):410-412. |
| [6] | Tan, X.H.;Xu, H.;Wu, S.J. .Glass forming ability of Fe-Co-Zr-Nd-B alloys and bulk permanent magnets derived from amorphous precursor[J].Journal of Materials Science,2010(20):5543-5546. |
| [7] | Chang, H.W.;Hsieh, C.C.;Gan, J.Y.;Cheng, Y.T.;Shih, M.F.;Chang, W.C. .Alloying effect on the magnetic properties of RFeB-type bulk magnets[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2011(6):064002-1-064002-10. |
| [8] | Chang H W;Cheng Y T;Hsieh C C;Chang W C .Improvement of magnetic properties and size of directly cast Nd-Fe-B bulk magnets by Ti/Zr co-substitutions[J].Mater Technol:Advanced Performance Materials,2012,27(01):98. |
| [9] | Wang C;Chen J J;Li Y;Luo C L,Chen W Z .Magnetic properties,microstructure and corrosion behavior of Nd10Y1Fe85-xNb3.5Ti0 5Bx (x =14 ～ 22) and Nd10Y1Fe69 Nb3 5Mo 5B16 (M =Ti,Zr,Cr,Mo) bulk nanocrystalline magnets[J].Journal of Alloys and Compounds,2013,555:16. |
| [10] | Chang H W;Hsiao T H;Cheng Y T;Shih C W Hsieh C C Chang W C .Comparison on the magnetic properties,phase evolution and microstructure of directly quenched Pr-Fe-Ti-B-based ribbons and rods[J].Journal of Alloys and Compounds,2013,551:694. |
| [11] | Chang WC.;Chang JK.;Chang HW.;Chen SK. .Magnetic properties and phase evolution of nanocomposite Nd10Febal.MCB10.5 (M = Ti, Nb, V, Cr and Mo) melt-spun ribbons[J].Physica, B. Condensed Matter,2003(2/4):296-299. |
| [12] | D. Nagahama;T. Ohkubo;T. Miyoshi .Effect of Ti and C additions on the microstructure and magnetic properties of Nd_6Pr_1Fe_(80)B_(13) melt-spun ribbons[J].Acta materialia,2006(18):4871-4879. |
| [13] | Hirosawa S;Kaneklyo H;Miyoshi T .Unusual effects of Ti and C additions on structural and magnetic properties of Nd-Fe-B nanocomposite magnets in a B-rich and Nd-poor composition range[J].Journal of Magnetism and Magnetic Materials,2004(1):58-67. |
| [14] | 李顺,白书欣,张虹,陈柯,肖加余.添加钛和碳对Nd9.4Fe79.6B11合金晶化方式、显微结构和磁性能的影响[J].中国稀土学报,2008(06):719-723. |
| [15] | Ohkubo T;Miyoshi T;Hirosawa S;Hono K .Effects of C and Ti additions on the microstructures of Nd9Fe77B14 nanocomposite magnets[J].Mater Sci Engin A,2007,449-451:435. |
| [16] | Tao, S.;Ahmad, Z.;Ma, T.;Jian, H.;Jiang, Y.;Yan, M. .Fe _(65)B _(22)Nd _9Mo _4 bulk nanocomposite permanent magnets produced by crystallizing amorphous precursors[J].Journal of Magnetism and Magnetic Materials,2012(8):1613-1616. |
| [17] | Tan X H;Xu H;Bai Q;Zhao W J Dong Y D .The structure and magnetic property for bulk Fe-Zr-Nd-Y-B alloys[J].Journal of Alloys and Compounds,2008,452:373. |
| [18] | 周果君,曾德长.相图分析在Nd-Fe-B永磁材料中的应用[J].磁性材料及器件,2010(06):14-16,28. |
| [19] | Liu Z;Lin W C;Shih C W;Hsieh C C,Chang H W,Chang W C,Yan A R .Effect of Co addition on the microstructure and magnetic properties of Nd9.5Febal CoxNb2 5Zr0 5B15 (x =0,10,20) bulk magnets[J].Journal of Alloys and Compounds,2012,538:28. |
| [20] | H.W. Chang;M.F. Shih;C.C. Hsleh .Magnetic property enhancement of directly quenched Nd-Fe-B bulk magnets with Ti substitution[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(2):499-503. |
| [21] | 白岗,答元,刘涛.Pr和Co的添加对NdFeB纳米复合永磁材料磁性能的影响[J].西安工业大学学报,2009(04):345-348. |
| [22] | Gu B X .Structure and magnetic properties of NdxFe83-xB17 alloys[J].Journal of Magnetism and Magnetic Materials,2003,263:332. |
| [23] | 袁钻如,戴庆平.热重分析仪TGA测定磁性材料的相转变[J].现代仪器,2005(03):36-38. |
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%