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

The preferred crystalline orientation of melt-spun Nd/sub 13/Fe/sub 80-x/M/sub x/B/sub 6/ 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/sub 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/sub 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.<
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