Hostname: page-component-77c89778f8-gvh9x Total loading time: 0 Render date: 2024-07-17T10:03:33.322Z Has data issue: false hasContentIssue false
  • English
  • Français

Characterization of the disproportionated NdFeCoZrB alloy by means of electron microscopy

Published online by Cambridge University Press:  31 January 2011

Jian-rong Gao ,
Xiao-ping Song  and
Xiao-tian Wang
Jian-rong Gao
Affiliation:
School of Materials, Xi'an Jiaotong University, Xi'an 710049, China
Xiao-ping Song
Affiliation:
School of Materials, Xi'an Jiaotong University, Xi'an 710049, China
Xiao-tian Wang
Affiliation:
School of Materials, Xi'an Jiaotong University, Xi'an 710049, China
Get access

Abstract

The microstructure of the disproportionated NdFeCoZrB alloy during the solid-HDDR (hydrogenation-disproportionation-desorption-recombination) process was investigated by means of scanning electron microscope (SEM) and transmission electron microscope (TEM). Except for a similar colony-type structure to ternary alloy, fine particles including spherical (Fe, Co)2B phase and undecomposed rim-like Nd2(Fe, Co)14B compound were found dispersed within the α–(Fe, Co) matrix of the microstructure of the disproportionated NdFeCoZrB alloy. An unknown Fe-rich phase with a comparable size to that of the matrix grain was also detected by electron diffraction. These results strongly suggest that the undecomposed rim-like Nd2(Fe, Co)14B particles are probably the memory sites for the origin of anisotropy of the received NdFeCoZrB materials.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 3 , March 1997 , pp. 581 - 584
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Takeshita, T. and Nakayama, R., Proceedings of the 10th International Workshop on Rare-Earth Magnets and Their Applications, Kyoto, Japan, May 1994, p. 551.Google Scholar
2.Takeshita, T. and Nakayama, R., Proceedings of the 11th International Workshop on Rare-Earth Magnets and Their Applications, Pittsburgh, PA, October 1991, p. 49.Google Scholar
3.Uehara, M., Tomizawa, H., Hirosawa, S., Tomida, T., and Maehara, Y., IEEE Trans. Magn. 29 (6), 2770 (1993).CrossRefGoogle Scholar
4.Buschow, K. H. J., IEEE Trans. Magn. 30 (2), 565 (1994).CrossRefGoogle Scholar
5.Harris, I. R., Proceedings of the 12th International Workshop on Rare-Earth Magnets and Their Applications, Canberra, Australia, July 1992, p. 670.Google Scholar
6.Nakamura, H., Suejifuji, R., Sugimoto, S., Okada, M., and Homma, M., J. Appl. Phys. 76 (10), 6828 (1994).CrossRefGoogle Scholar
7.Nakayama, R. and Takeshita, T., J. Alloys Comp. 193, 259 (1993).CrossRefGoogle Scholar
8.Gutfleisch, O., Matzinger, M., Fidler, J., and Harris, I. R., J. Magn. Magn. Mater. 147, 320 (1995).CrossRefGoogle Scholar