采用放电等离子烧结技术(Spark Plasma Sintering,简称SPS技术)将快淬Nd4.5Fe77B18.5薄带制备成块状纳米晶复合磁体.着重研究了热处理工艺对磁体密度、微观结构和磁性能的影响.结果表明,通过直接烧结得到的磁体具有超细纳米晶结构,合适的热处理可以消除残余非晶,得到较好的晶体结构和磁性能.但过高的热处理温度和较长的保温时间的增大会造成晶粒长大,结果导致磁性能的恶化.在最佳热处理条件下得到的磁体的磁性能为Br=1.014T,JHc=237.21 kA/m,(BH)max=61.85 kJ/m3.
参考文献
[1] | Coehoom R;Mooij de D B;Waard de C .Melt spun permanent magnets materials containing Fe3 B as the main phase[J].Journal of Magnetism and Magnetic Materials,1989,80:101-104. |
[2] | 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. |
[3] | Manaf A;Buckley R A;Davies H A .New nanocrystalline high-remanence Nd-Fe-B alloys by rapid solidification[J].Journal of Magnetism and Magnetic Materials,1993,128:302-306. |
[4] | Skomski R .Aligned two-phase magnets:Permanent magnetism of the future[J].Journal of Applied Physics,1994,76:7059-7064. |
[5] | Saito T .Production of bulk materials of an Nd4Fe77.5 B18.5 alloy and their magnetic properties[J].IEEE Transactions on Magnetics,2001,37:2561-2563. |
[6] | Q. Zeng;Y. Zhang;M. J. Bonder;G. C. Hadjipanayis;R. Radhakrishnan .Bulk SmCo_(5)/α-Fe Composite by Plasma Pressure Consolidation[J].IEEE Transactions on Magnetics,2003(5):2974-2976. |
[7] | Piotr Pawlik;Hywel A. Davies;Waldemar Kaszuwara .PrFeCoB-based magnets derived from bulk alloy glass[J].Journal of Magnetism and Magnetic Materials,2005(2):1243-1246. |
[8] | D. Lee;J. S. Hilton;S. Liu;Y. Zhang;G. C. Hadjipanayis;C. H. Chen .Hot-Pressed and Hot-Deformed Nanocomposite (Nd,Pr,Dy)_(2)Fe_(14)B/α-Fe-based Magnets[J].IEEE Transactions on Magnetics,2003(5):2947-2949. |
[9] | D. Lee;J. S. Hilton;C. H. Chen;M. Q. Huang;Y. Zhang;G. C. Hadjipanayis;S. Liu .Bulk Isotropic and Anisotropic Nanocomposite Rare-Earth Magnets[J].IEEE Transactions on Magnetics,2004(4):2904-2906. |
[10] | Tamari N;Tanaka T;Tanaka K et al.Effect of spark plasma sintering on densification and mechanical properties of silicon carbide[J].Journal of the Ceramic Society of Japan,1995,103:740-742. |
[11] | Yue Ming;Tian Meng;Liu Weiqiang et al.Spark plasma sintering Nd2Fe14 B/ α-Fe bulk exchange-spring magnets[J].Materials Science Forum,2005,475-479(03):2061-2064. |
[12] | Ming Yue;Jiuxing Zhang;Meng Tian.Microstructure and magnetic properties of isotropic bulk NdxFe94-x B6 (x = 6,8,10) nanocomposite magnets prepared by spark plasma sintering[J].Journal of Applied Physics |
[13] | Coehoorn R;Mooij de D B;Waard de C .Melt-spun permanent magnet materials containg Fe3B as the main phase[J].Journal of Magnetism and Magnetic Materials,1989,80:101-104. |
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%