Preferred crystalline orientation of melt-spun Nd-Fe-M-B flakes (M=Ti/Zr/Hf/V/Nb/Ta)

Author

Chin, Tsung-Shune ; Huang, S.H. ; Yao, J.M.

Author_Institution

Dept. of Mater. Sci. & Eng., Tsing Hua Univ., Hsinchu, Taiwan

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2136

Lastpage

2138

Abstract

The preferred crystalline orientation of melt-spun Nd₁₃Fe_80-xM_xB₆ flakes (M=0.5 to 3 at.% of Ti, Zr, Hf, V, Nb, or Ta) prepared by single roller melt spinning were studied by X-ray diffractometry, microstructure, and magnetic measurements. Certain alloying elements, M=Ti, Zr, V, and Ta, enhance both preferred crystalline orientation and coercivity at moderate wheel speeds V_s, typically 8 to 15 m/s. The degree of preferred orientation calculated from X-ray diffraction patterns is a higher than 50% across the whole thickness, at V_s=8 and 10 m/s, despite the apparent equiaxed grains. Magnetic measurements on spun flakes and field aligned pulverized powders show highly anisotropic behavior. They have potential applications for anisotropic resin bond magnets

Keywords

X-ray diffraction examination of materials; alloying additions; boron alloys; coercive force; crystal microstructure; crystal orientation; ferromagnetic properties of substances; hafnium alloys; iron alloys; melt spinning; neodymium alloys; niobium alloys; permanent magnets; tantalum alloys; titanium alloys; vanadium alloys; zirconium alloys; 8 to 15 m/s; Nd₁₃Fe_80-xHf_xB₆; Nd₁₃Fe_80-xNb_xB₆; Nd₁₃Fe_80-xTa_xB₆; Nd₁₃Fe_80-xTi_xB₆; Nd₁₃Fe_80-xV_xB₆; Nd₁₃Fe_80-xZr_xB₆; X-ray diffraction patterns; X-ray diffractometry; anisotropic resin bond magnets; coercivity; equiaxed grains; field aligned pulverized powders; magnetic measurements; melt spun flakes; microstructure; preferred crystalline orientation; single roller melt spinning; wheel speeds; Anisotropic magnetoresistance; Crystallization; Hafnium; Iron; Magnetic variables measurement; Neodymium; Niobium; Spinning; X-ray diffraction; Zirconium;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179421

Filename

179421