Paper Title:
Microstructure and Magnetic Properties of Nd4.5Fe(76.5-x)B18.5Cu0.5Zrx Nanocomposite Permanent Magnetic Alloys
  Abstract

Nanocomposite Nd2Fe14B/Fe3B magnetic materials with high performance have been obtained by crystallizing over-quenched ribbons. The effect of addition element of Cu and Zr on the phase component, microstructure and magnetic properties of Nd4.5Fe(76.5-x)B18.5Cu0.5Zrx (x= 0.4, 0.5, 1.5, 2.0, 3.0, 4.0) has been systematically investigated. The average grain size of Nd2Fe14B phase and Fe3B phase for the different compositions were calculated from X-day diffraction pattern, which are in accordance with TEM micrographs. For the Nd4.5Fe77B18.5 ribbons, the average grain size of Nd2Fe14B and Fe3B were 34.2 nm and 51.7 nm, and for the Nd4.5Fe76.3B18.5Cu0.5Zr0.4 ribbons, they were only 36.5 nm and 37.1 nm, respectively. It has been found that the additions of Cu and Zr cause the reduction of the difference of grain size between the hard magnetic phase and the soft magnetic phase, that increase the exchange coupling between them. Therefore, it would lead to the magnetic properties improvement. It has been determined that Nd4.5Fe76.3B18.5Cu0.5Zr0.4 was the optimal composition, and the optimal magnetic properties were: Br= 1.204 T, Hci= 271 kA/m, and (BH)max =111.2 kJ/m3.

  Info
Periodical
Solid State Phenomena (Volumes 121-123)
Edited by
Chunli BAI, Sishen XIE, Xing ZHU
Pages
1277-1280
DOI
10.4028/www.scientific.net/SSP.121-123.1277
Citation
Y. Qiao, M. C. Zhang, J. Zhu, "Microstructure and Magnetic Properties of Nd4.5Fe(76.5-x)B18.5Cu0.5Zrx Nanocomposite Permanent Magnetic Alloys", Solid State Phenomena, Vols. 121-123, pp. 1277-1280, 2007
Online since
March 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: C.S. Kim, J.H. Kang, Jai Won Byeon, S.I. Kwun
Abstract:The magnetic coercivity of ferritic 12Cr steel was experimentally studied in order to characterize its microstructures and mechanical...
1253
Authors: Jie Dong, Z.F. Li, Xiao Qin Zeng, Wen Jiang Ding
Abstract:Intermediate phase growth in Mg-Al diffusion couples were studied with different intensity of a strong static magnetic field from 0 to 10...
491
Authors: Mitsuhiro Watanabe, Shinji Kumai
Abstract:Magnetic pulse welding was applied to the lap joining of similar (Al/Al) and dissimilar materials (Al/Fe, Al/Cu, and Al/Ni). The magnetic...
755
Authors: Yan Wu, Yan Lu, Xiang Zhao, Liang Zuo
Abstract:The effect of magnetic field on diffusion behavior of carbon in pure iron was investigated. The results showed that the magnetic field can...
67
Authors: Min Gang Zhang, Li Li Yang, Yi Chao Zhao, Jia Zhang, Gang Sun
Optical and Visual Signal
Abstract:The magnetic hysteresis loops of Nd2Fe14B/α-Fe/Nd2Fe14B exchange-coupling trilayer film are...
567