Investigation of Magnetic Anisotropy for α-Fe/Nd<SUB>2</SUB>Fe<SUB>14</SUB>B Composition Alloy as Exchange-Spring Magnets Prepared Using Hot-Upsetting Technique
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概要
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A hot-upsetting process was applied to rapidly quenched starting ribbon powders having Nd<SUB>10</SUB>Fe<SUB>8</SUB>0Co<SUB>5</SUB>B<SUB>5</SUB> alloy composition of the α-Fe/Nd<SUB>2</SUB>Fe<SUB>14</SUB>B system, with the aim of obtaining anisotropic exchange-spring magnets. Specimens fabricated at upsetting temperatures up to 950°C displayed isotropic magnetic properties, but anisotropic magnetic properties were manifested at 1000°C or higher. Specimens that exhibited anisotropy showed magnetic properties on the order of B<SUB>r</SUB> = 0.3 T and H<SUB>cJ</SUB>= 30 kA/m and consisted of a soft α-Fe magnetic phase and a hard Nd<SUB>2</SUB>Fe<SUB>14</SUB>B magnetic phase. Hard-phase crystals showed equiaxial morphology and reached a grain size of approximately 1μm. We observed from XRD patterns that the easy-magnetization axis of the hard-phase crystals tended to be oriented parallel to the direction of applied upsetting pressure.
- 社団法人 日本磁気学会の論文
著者
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Kawashita Y.
Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
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Sugiyama T.
Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
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Ono H.
Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
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Takabayashi H.
Research & Development Laboratory, Daido Steel Co., Ltd
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Iriyama T.
Research & Development Laboratory, Daido Steel Co., Ltd
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Tayu T.
Materials Research Laboratory Nissan Research Center Nissan Motor Co. Ltd.
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Kawashita Y.
Materials Research Laboratory Nissan Research Center Nissan Motor Co. Ltd.
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Iriyama T.
Research & Development Laboratory, Daido Steel Co., Ltd.
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Takabayashi H.
Research & Development Laboratory, Daido Steel Co., Ltd.
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