Microstructure and Magnetic Properties of NdFeB Magnets Using Fluorides Nano-Coated Process

Abstract:

Article Preview

Nd2Fe14B magnets could be sintered using terbium fluoride coated Nd2Fe14B powders. Fluorine atoms were segregated at the triple junctions and grain boundary after sintering and aging process. NdOF with fcc structure was grown at the triple junction. Terbium atoms were also distributed near grain boundaries by interdiffusion between the fluoride and Nd2Fe14B. No fluorine atoms were detected in Nd2Fe14B phase. The coercivity for 0.5wt% terbium fluoride coated magnet showed 1.23 MA/m which was 1.2 times higher than that for non-coated magnet with 1.04MA/m. The distribution of terbium and fluorine atoms increases the coercivity without reduction of remanence.

Info:

Periodical:

Materials Science Forum (Volumes 638-642)

Main Theme:

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu

Pages:

1357-1361

DOI:

10.4028/www.scientific.net/MSF.638-642.1357

Citation:

M. Komuro et al., "Microstructure and Magnetic Properties of NdFeB Magnets Using Fluorides Nano-Coated Process ", Materials Science Forum, Vols. 638-642, pp. 1357-1361, 2010

Online since:

January 2010

Export:

Price:

$38.00

[1] H. Hiwaki, H. Murakami, Y. Honda, M. Sanada, S. Morimoto and Y. Takeda, IEEJ transactions on Industry Applications, vol. 126, No. 7, 852(2006).

[2] M. Sagawa, S. Hirosawa, K. Tokuhara, H. Yamamoto and S. Fujimura, J. Appl. Phys. 61, 3559(1987).

[3] T. Sebastian, IEEE Trans. Industry Applications. 31, 353(1995).

[4] S. Hirosawa, K. Tokuhara and M. Sagawa, Jpn. J. Appl. Phys., 26, L1359(1987).

[5] D. Li, S. Suzuki, T. Kawasaki and K. Machida, Jpn. J. Appl. Phys., 47, 7876(2008).

[6] K. Yoshimura, Japan Patent P2006-159960.

[7] H. Nakamura, K. Hirota, T. Minowa and M. Honshima, IEEE Trans. Magn. 41, 3844(2005).

[8] H. Nakamura, K. Hirota, T. Minowa and M. Honshima, Magnetics Japan 31, 6(2007) in Japanese.

[9] H. Suzuki, Y. Satsu and M. Komuro, published to J. Appl. Phys., 105, (2009).

[10] Wenjian Mo, Lanting Zhang, Qiongzhen Liu, Aidang Shan, Jiansheng Wu, Matahiro Komuro, Scripta Materialia, vol. 59, 179(2008).

DOI: 10.1016/j.scriptamat.2008.03.004

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