采用放电等离子烧结技术制备了致密纳米晶SmCo6.6Nb0.4烧结磁体,研究了磁体的结构和磁性能.结果表明,烧结磁体具有TbCu7结构,说明通过SPS过程可以获得稳定的1:7相;磁体由平均晶粒尺寸约为30 nm的1:7相构成,磁体的室温矫顽力高达2.8 T,而剩磁比高达0.74,说明在纳米晶之间存在强烈的晶间交换耦合作用.烧结磁体具有良好的高温性能,773K时的矫顽力为0.48 T,矫顽力温度系数β为-0.169%/K.
参考文献
| [1] | Yongquan Guo,Wei Li,Weichun Feng,Structural stability and magnetic properties of SmCo7-xGax,Appl.Phys.Lett.,86,192513(2005) |
| [2] | J.Luo,J.K.Liang,Y.Q.Guo,Q.L.Liu,Crystal structure and magnetic properties of SmCo5.85Si0.90 compound,Appl.Phys.Lett.,84,3094(2004) |
| [3] | H.Saito,M.Takahashi,T.Wakiyama,G.Kodoand,H.Nakagawa,Magnetocrystalline anisotropy for Sm2(CoMn)17 compound with TbCu7 type disordered structure,J.Magn.Magn.Mater.,82,322(1989) |
| [4] | J.Luo,J.K.Liang,Y.Q.Guo,Effects of the doping element on crystal structure and magnetic properties of Sm(Co,M)7 compounds (M=Si,Cu,Ti,Zr,and Hf),J.Intermetallics,13,710(2005) |
| [5] | I.A.Al-Omari,Y.Yeshurun,J.Zhou,D.J.Sellmyer,Magnetic and structural properties of SmCo7-xCux alloys,J.Appl.Phys.,87,6710(2000) |
| [6] | Chengbao Jiang,M.Venkatesan,K.Gallagher,J.M.D.Coey,Magnetic and structural properties of SmCo7-xTix magnets,J.Magn.Magn.Mater.,236,49(2001) |
| [7] | M.Q.Huang,W.E.Wallace,M.McHenry,Structure and magnetic properties of SmCo7-xZrx alloys (x=0-0.8),J.Appl.Phys.,83,6718(1998) |
| [8] | Y.Q.Guo,W.Li,J.Luo,W.C.Feng,J.K.Liang,Structure and magnetic characteristics of novel SmCo-based hard magnetic alloys,J.Magn.Magn.Mater.,303,e367(2006) |
| [9] | Jun Yang,O.Mao,Z.Altounian,Structure and magnetic properties of mechanically alloyed SmCo7 compound,IEEE Transactions on Magnetics,32,4380(1996) |
| [10] | A.Hsiao,S.Aich,L.H.Lewis,J.E.Shield,Magnetization processes in melt-spun Sm-Co based alloys with the TbCu7-type structure,IEEE Transaction on Magnetics,40,2913(2004) |
| [11] | S.Aich,J.Kostogorova,J.E.Shield,Magnetic behavior of Sm-Co-based permanent magnets during order/disorder phase transformations,J.Appl.Phys.,97,10H108(2005) |
| [12] | S.Derkaoui,N.Valignat,C.H.Allibert,Co corner of the system Sm-Co-Zr:decomposition of the phase 1:7 and equilibria at 850 ℃,J.Alloys and Compounds,235,112(1996) |
| [13] | J.Zhou,I.A.Al-Omari,J.P.Liu,D.J.Sellmyer,Structure and magnetic properties of SmCo7-xTix with TbCu7-type structure,J.Appl.Phys.,87,5299(2000) |
| [14] | T.Saito,Magnetic properties of Nd-Fe-Ti-C-B nanocomposite magnets produced by spark plasma sintering method,Journal of Applied Physics,99,8B522-1(2006) |
| [15] | Ming Yue,Jiuxing Zhang,Yaofu Xiao,New kind of NdFeB magnet prepared by spark plasma sintering,IEEE transaction on magnetics,39,3551(2003) |
| [16] | Mamoru Omori,Sintering,consolidation,reaction and crystal growth by the spark plasma system (SPS),Materials Science and Engineering,A287,183(2000) |
| [17] | Wang Yucheng,Fu Zhengyi,Study of temperature field in spark plasma sintering,Materials Science and Engineering B,B90,34(2002) |
| [18] | M.Hasequawa,T.Asano,K.Hashimoto,Y.Furuya,Fabrication of multiferroic composite actuator material by combining superelastic TiNi filler and a magnetostrictive Ni matrix,Smart Materials and Structures,15,N124(2006) |
| [19] | Xiangyun Deng,Xiaohui Wang,Hai Wen,Aiguo Kang,Zhilun Gui,Longtu Li,Phase transitions in nanocrystalline barium titanate ceramics prepared by spark plasma sintering,Journal of the American Ceramic Society,89,1059(2006) |
| [20] | S.Aich,J.E.Shield,Effect of Nb and C additions on the microstructures and magnetic properties of rapidly solidified Sm-Co alloys,J.Alloys and Compounds,425,416(2006) |
| [21] | J.Zhou,R.Skomski,C.Chen,G.C.Hadjipanayis,D.J.Sellmyer,SmCoCuTi high temperature permanent magnets,Appl.Phys.Lett.,77,1514(2000) |
| [22] | George C.Hadjipanayis,Nanophase hard magnets,J.Magn.Magn.Mater.,200,373(1999) |
| [23] | O.Gutfleisch A.Bollero,A.Handstein,A.Yan,Nanocrystalline high performance permanent magnets,J.Magn.Magn.Mater.,242-245,1277(2002) |
| [24] | G.B.Clemente,J.E.Keem,J.P.Bradley,The microstructural and compositional influence upon HIREM behavior in Nd2Fe14B,J.Appl.Phys.,64,5299(1988) |
| [25] | J.Luo,J.K.Liang,Y.Q.Guo,Crystal structure and magnetic properties of SmCo7-xHfx compounds,Appl.Phys.Lett.,85,5299(2004) |
| [26] | K.H.J.Buschow,A.S.van der Goot.Composition and crystal structure of hexagonal Cu-rich rare-earth copper compounds,Acta Crystallographica,Section B (Structural Crystallography and Crystal Chemistry),B27,1085(1971) |
| [27] | J.Deportes,D.Givord,J.Schweizer,F.Tasset,Different contributions of the two cobalt sites to the magnetocrystalline anisotropy of YCo5 and related compounds,IEEE Transaction on Magnetics,12,1000(1976) |
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%