Title :
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
fDate :
9/1/1992 12:00:00 AM
Abstract :
The preferred crystalline orientation of melt-spun Nd13Fe80-xMxB6 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 Vs , 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 Vs=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; Nd13Fe80-xHfxB6; Nd13Fe80-xNbxB6; Nd13Fe80-xTaxB6; Nd13Fe80-xTixB6; Nd13Fe80-xVxB6; Nd13Fe80-xZrxB6; 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;
Journal_Title :
Magnetics, IEEE Transactions on
