采用放电等离子烧结技术制备了致密纳米晶SmCoCuFeZr烧结磁体,研究了磁体的结构和磁性能.X衍射结果表明,烧结磁体具有TbCu_7结构.TEM观察显示,烧结磁体平均晶粒尺寸为35nm.室温时磁体的剩磁为0.49T,矫顽力高达1.42T,而剩磁比Mr/Ms为0.63,表明在纳米晶之间存在晶间交换耦合作用.
Bulk nanocrystalline SmCoCuFeZr sintered magnet was prepared by Spark Plasma Sintering technique(SPS),Structure and magnetic properties of the magnet were studied.XRD patterns show that the magnet exhibits TbCu_7 structure.TEM observation indicates that the average grain size of the magnet is 35 nm.Magnetic measurement shows that the remanenee is 0.49T and the eoercivity of the magnet teaehes as high as 1.42T at room temperature.The ratio of Mr/Ms is 0.63,which demonstrates the existence of intergrain exchange coupling among the nanograins.
参考文献
| [1] | Menth A .Influence of Cu-content Oil the hard magnetic properties ofSm(Co,Cu)2:17 compounds[J].Applied Physics Letters,1976,29(04):270-272. |
| [2] | Sam Liu;Jie Yang;George Doyle;G. Edward Kuhl;Gerard Simon;Christina Chen;Marlin Walmer;Michae .New sintered high temperature Sm-Co based permanent magnet materials[J].IEEE Transactions on Magnetics,1999(5 Pt.2):3325-3327. |
| [3] | Marlin S. Walmer;Christina H. Chen;Michael H. Walmer .A New Class of Sm-TM Magnets for Operating Temperatures Up to 550℃[J].IEEE Transactions on Magnetics,2000(5):3376-3381. |
| [4] | Aru Yan;Alberto Bollero;Karl-Hartmut Muller;Oliver Gutfleisch .Highly Coercive Melt-Spun Sm(Co, Fe, Cu, Zr)_(z) Magnets Prepared by Simple Processing[J].IEEE Transactions on Magnetics,2002(5):2937-2939. |
| [5] | 周寿增.稀十永磁材料及其应用[M].北京:冶金工业出版社,1995:144-156. |
| [6] | Jun Yang;Mao O. .Structure and magnetic properties of mechanically alloyed SmCo/sub 7/ compound[J].IEEE Transactions on Magnetics,1996(5):4380-4382. |
| [7] | Ming Yue;Jiuxing Zhang;Dongtao Zhang et al.Structure and magnetic properties of Sm6.6Nd0 4 bulk nanocrystalline permanent magnet[J].Applied Physics Letters,2007,90(24):242506/1-242506/3. |
| [8] | M Hasequawa;T Asano;K Hashimoto;Y Furuya .Fabrication of muhiferroie composite actuator material by combining superelastic TiNi filler and a magnetostrictive Ni matrix[J].Smart Materials and Structures,2006,15:124-127. |
| [9] | H Saito;M T Wakiyama;G Kodoand;H Nakagawa .Magnetocrystalline anisotropy for Sm2(Co-Mn)_(17)compound with TbCu_7 type disordered structure[J].Journal of Magnetism and Magnetic Materials,1989,82:322-325. |
| [10] | 张昌文,李华,董建敏,王永娟,潘凤春,张键,郭永权,李卫.亚稳相化合物SmCo7的磁性及电子结构[J].中国科学G辑,2005(03):260-270. |
| [11] | 张健,沈保根.球磨SmCo5纳米晶的结构与磁性[J].金属功能材料,2001(03):10-12. |
| [12] | A. Yan;A. Bollero;K. H. Muller;O. Gutfleisch .Influence of Fe, Zr, and Cu on the microstructure and crystallographic texture of melt-spun 2:17 Sm-Co ribbons[J].Journal of Applied Physics,2002(10):8825-8827. |
| [13] | Fischer F;Schrefi T;Kronm Tiller H;Filder J .Grain -size dependence of remanence and coercive field of isotropic nanocrystalline composite permanent magnets[J].Journal of Magnetism and Magnetic Materials,1996,153:35-40. |
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%