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The coercivity of the melt-spun pseudobinary (NdFe/sub 10/Cr/sub 2/)/sub 1-x/ (Nd/sub 2/B)/sub x/ alloys, in which Nd/sub 2/B represents a composition of Nd/sub 0.67/B/sub 0.33/, was systematically studied. It was found that significant coercivities are possible with optimal additions of the Nd-B composition at x=0.5-0.7. The as-spun (substrate velocity=10 m/s) coercivity increased from 0.1 kOe at x=0.0 to maxima of 7.0 and 7.5 kOe at x=0.5 and 0.7, due to the Nd/sub 2/Fe/sub 14/B and a new Fe-Nd phase, respectively, as evidenced from thermomagnetic analysis and X-ray diffraction. Annealing the overquenched amorphous x=0.7 alloy led to the crystallization of the Nd/sub 2/Fe/sub 14/B phase, and a coercivity of 8.5 kOe was obtained.>
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Huang et al. (1990) studied this question.
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