<i>d</i>-HDDR法によるDyフリーNd-Fe-B系異方性ボンド磁石の開発と将来展望

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  • Development and Future Prospects of Nd-Fe-B Anisotropic Bonded Magnets Produced by <i>d</i>-HDDR Method
  • d-HDDR法によるDyフリーNd-Fe-B系異方性ボンド磁石の開発と将来展望
  • d-HDDRホウ ニ ヨル Dy フリー Nd-Fe-Bケイ イホウセイ ボンド ジシャク ノ カイハツ ト ショウライ テンボウ

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<p>Dy-free Nd-Fe-B anisotropic bonded magnets have superior features of high magnet properties of Nd2Fe14B compounds as well as shape flexibility and high electrical resistivity of bonded magnets. By taking advantage of such excellent features, they have been used in direct-current motors for automobiles, and recently, advances in molding technology have promoted the application of bonded magnets to direct-current brushless motors such as those for drones. With the electrification of automobiles toward the realization of energy-saving and decarbonized society, resource saving of motors is required. Here, motors using Dy-free Nd-Fe-B anisotropic bonded magnets can contribute to this requirement because of their high electrical resistivity, which reduces eddy currents and enables high-speed rotation and miniaturization. Therefore, the demand for such bonded magnets is expected to increase further. This paper describes manufacturing processes and recent developments of Dy-free Nd-Fe-B anisotropic bonded magnets and its future prospects.</p>

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