论文信息 - Site occupancy of Zr in Nd(FeZr)B magnet during hydrogenation disproportionation desorption recombination process

Site occupancy of Zr in Nd(FeZr)B magnet during hydrogenation disproportionation desorption recombination process

In order to elucidate the role of Zr addition for the evolution of magnetic anisotropy in hydrogenation disproportionation desorption recombination treated NdFeB magnets, Zr site occupancy in Nd16Fe75.5Zr0.5B8 alloy has been investigated by means of x-ray absorption fine structure. Zr is found to occupy preferably the Fe(j2) sites in the Nd2Fe14B structure for the as-cast state and keeps this position in the disproportionated stage. Zr(j2) sites are situated at the position connecting two Fe-hexagonal nets where strong Fe–Zr bondings stabilize Nd2Fe14B structure against disproportionation.

M. Matsuura | M. Sakurai | A. Ashfaq

[1] N. Sano,et al. Orientational memory site in hydrogenation disproportionation desorption recombination process of anisotropic Nd2Fe14B-based magnets , 1997 .

[2] S. Hirosawa,et al. Origin of magnetic anisotropy formation in the HDDR-process of Nd2Fe14B-based alloys , 1996 .

[3] I. R. Harris,et al. Fundamental and practical aspects of the hydrogenation, disproportionation, desorption and recombination process , 1996 .

[4] I. R. Harris,et al. HDDR processes in Nd/sub 16/Fe/sub 76-x/Zr/sub x/B/sub 8/ alloys and the production of anisotropic magnets , 1996 .

[5] K. Buschow. Trends in rare earth permanent magnets , 1994 .

[6] R. Mishra,et al. Determination of the zirconium site in zirconium‐substituted Nd2Fe14B , 1993 .

[7] I. R. Harris,et al. Anisotropic HDDR epoxy bonded magnets from NdFeBZr , 1992 .

[8] K.H.J. Buschow,et al. New developments in hard magnetic materials , 1991 .

[9] John J. Rehr,et al. Theoretical X-ray Absorption Fine Structure Standards , 1991 .

[10] M. Jurczyk,et al. Magnetic behavior of R1.9Zr0.1Fe14B and R1.9Zr0.1Fe12Co2B compounds , 1986 .

[11] D. Shoemaker,et al. The structure of a new magnetic phase related to the sigma phase: iron neodymium boride Nd2Fe14B , 1984 .

[12] William B. Yelon,et al. Relationships between crystal structure and magnetic properties in Nd 2 Fe 14 B , 1984 .