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Magnetic properties, microstructures and domain structures of arc-plasma sprayed Nd-Fe-B permanent magnet

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Abstract

Thin Nd-Fe-B films prepared by arc-plasma spraying at different substrate temperatures were investigated for their magnetic and structural properties. The isotropic magnets with the best magnetic properties (M H c=1.2 MA m−1, μo M r=0.6 T, (BH)max=64 kJ m−3), were obtained after plasma spraying the Nd-Fe-B powders on water-cooled copper substrates and subsequently annealing the films for 0.5 h at 750 °C. The optimum magnetic properties of the anisotropic Nd-Fe-B films, i.e. M H c=1.2 MA−1, μo M r=0.9 T and (BH)max=180 kJ m−3, were obtained in films sprayed on to heated to 600 °C substrates. The magnetic properties of the sprayed films were strongly influenced by the microstructure. The domain structure of these films is also presented.

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Wysłocki, J.J. Magnetic properties, microstructures and domain structures of arc-plasma sprayed Nd-Fe-B permanent magnet. J Mater Sci 27, 3777–3781 (1992). https://doi.org/10.1007/BF00545455

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  • DOI: https://doi.org/10.1007/BF00545455

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