The Magnetic Properties of Nd-Fe-B Melt-Spun Ribbons with Lower Nd Content

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Present work describes the magnetic properties of Nd-Fe-B melt-spun ribbons which have lower Nd content than the Nd2Fe14B compound. The studied alloys were (1) NdxFe94-xB6, (2) (Fe3B)1-x-(Nd2Fe14B)x and (3) Fe1-x-(Nd2Fe14B)x. The grain refinement were underwent by studying the conditions of annealing for crystallization. It results in disappearing noticeable knicks in the demagnetization curves, which is attributed to precipitations of α-Fe and Fe3B phases. The Nd8Fe86B6 melt-spun ribbon annealed at 650°C for 30 min exhibits the highest (BH)max of 126kJm-3(15.8MGOe). The V addition is effective for improving the coercivity.