Improvement of Coercivity and Corrosion Resistance of Nd-Fe-B Sintered Magnets with Cu Nano-particles Doping

材料科学技术（英文）, 2012, 28(10): 927-930.

Improvement of Coercivity and Corrosion Resistance of Nd-Fe-B Sintered Magnets with Cu Nano-particles Doping

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

2.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

3.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

4.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

5.Earth-panda Advance Magnetic Material Co., Ltd., Anhui 231500, China

6.Earth-panda Advance Magnetic Material Co., Ltd., Anhui 231500, China

基金项目: the National High Technol-ogy Research and Development Program of China(2012AA063201) the Key P rogram of Science and Technol-ogy Development Project of Beijing Municipal Education Commission(KZ201110005007) 211 Project of Bei-jing University of Technology and Rixin Talents of Beijing University of T the National Natural Sci-ence Foundation of China(51001002) the Research Fund for the Doctoral Program of Higher Education of China(20091103120024)

关键词： Nd-Fe-B永磁体 , 铜纳米粒子 , 耐腐蚀性能 , 烧结磁体 , 高矫顽力 , 掺杂量 , 烧结Nd-Fe-B磁体 , 抗氧化性能

Improvement of Coercivity and Corrosion Resistance of Nd-Fe-B Sintered Magnets with Cu Nano-particles Doping

Keywords： Nd-Fe-B , Cu nano-particles , Coercivity , Corrosion resistance , Oxidation ,

Nd-Fe-B permanent magnets with a small amount of Cu nano-particles doping have been prepared by con-ventional sintered method. Effects of Cu content on magnetic properties, corrosion resistance, and oxidation properties of the magnets have been studied. It shows that the coercivity rises gradually, while the remanence decreases simultaneously with increasing Cu doping amount. Microstructure observation reveals that Cu ele- ment enriches mainly the Nd-rich phase. Autoclave test results show that the corrosion rate of the magnets decreases with increasing Cu content. After oxidation, the maximum energy product loss of the magnets with 0 and 0.2 wt% Cu nano-particles doping are 6.13% and 0.g9%, respectively. Therefore, it is concluded that Cu nano-particles doping is a promising way to enhance the coercivity and corrosion resistance of sintered Nd-Fe-B magnets.

参考文献

[1]	I. Gurappa .Corrosion characteristics of permanent magnets in acidic environments[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2003(1/2):236-242.
[2]	M. Katter;L. Zapf;R. Blank;W. Fernengel;W. Rodewald .Corrosion Mechanism of RE-Fe-Co-Cu-Ga-Al-B Magnets[J].IEEE Transactions on Magnetics,2001(4):2474-2476.
[3]	C.Y. You,J. Zhu,N. Tian,Z.X. Lu.Coercivity Enhancement of Nd-Fe-B Thin, Film Magnets through Dy Surface Diffusion Process[J].材料科学技术学报：英文版,2011(09):826-830.
[4]	W.F. Li;H. Sepehri-Amin;T. Ohkubo .Distribution of Dy in high-coercivity (Nd,Dy)-Fe-B sintered magnet[J].Acta materialia,2011(8):3061-3069.
[5]	K. Hirota;H. Nakamura;T. Minowa;M. Honshima .Coercivity Enhancement by the Grain Boundary Diffusion Process to Nd-Fe-B Sintered Magnets[J].IEEE Transactions on Magnetics,2006(10):2909-2911.
[6]	W.Q. Liu;H. Sun;X.F. Yi;X.C. Liu;D.T. Zhang;M. Yue;J.X. Zhang .Coercivity enhancement in Nd-Fe-B sintered permanent magnet by Dy nanoparticles doping[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1):67-69.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

Improvement of Coercivity and Corrosion Resistance of Nd-Fe-B Sintered Magnets with Cu Nano-particles Doping

Improvement of Coercivity and Corrosion Resistance of Nd-Fe-B Sintered Magnets with Cu Nano-particles Doping

参考文献