High Permeability and Low Core Losses of Nanocrystalline Fe-Nb-Zr-B-Cu Alloys
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概要
- 論文の詳細を見る
Nanocrystalline Fe-M-B (M=Zr or Nb) alloys prepared by crystallization of rapidly quenched amorphous ribbons are known as a new class of soft magnets with high saturation magnetization. In order to improve their soft magnetic properties further, the reduction of their magnetostriction to zero was attempted by a combined addition of Zr and Nb, because the signs of the magnetostriction of the Fe-Zr-B and the Fe-Nb-B at each optimum condition are known to be opposite. Further, the B concentration was reinvestigated under a Cu addition and the combined addition of Zr and Nb in order to further refine the grain size and to improve the intergranular exchange coupling. As a result, the small average grain size of 8nm and nearly zero magnetostriction has been simultaneously obtained in the Fe_<84>Nb_<3.5>Zr_<3.5>B_8Cu_1 alloy. This alloy simultaneously exhibits the high permeability of 100, 000 (at 1kHz) and the high saturation flux density of 1.53T, satisfying the both properties in the highest level among the rapidly quenched ribbons ever reported. The core losses of the nanocrystalline Fe_<84>Nb_<3.5>Zr_<3.5>B_8Cu_1 alloy are lower than those of the amorphous Fe-Si-B alloys over a wide frequency and Bm (maximum induction) range. Further, the core losses are almost unchanged under the stresses such as epoxy resin molding. These new nanocrystalline materials are suitable for use in advanced electronic devices such as inductors or transformers.nanocrystallinesoft magnetic alloymelt spun ribbonamorphous alloycrystallizationcore loss
- 東北大学の論文
- 1996-03-28
著者
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Inoue Akihisa
Institute For Materials Research
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INOUE A.
Institute for Materials Research, Tohoku University
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Masumoto T.
Institute for Materials Research, Tohoku University
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Makino A.
Nagaoka Branch, Central Research Laboratory, Alps Electric Co., Ltd.
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Hatanai T.
Nagaoka Branch, Central Research Laboratory, Alps Electric Co., Ltd.
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Yoshida S.
Nagaoka Branch, Central Research Laboratory, Alps Electric Co., Ltd.
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Hasegawa N.
Nagaoka Branch, Central Research Laboratory, Alps Electric Co., Ltd.
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Hatanai T
Alps Electric Co. Ltd. Nagaoka Jpn
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Masumoto T
The Research Institute For Electric And Magnetic Materials
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Masumoto T.
Institute For Materials Research
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Makino A.
Nagaoka Branch Central Research Laboratory Alps Electric Co. Ltd.
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Inoue A
Institute For Materials Research Tohoku Univ.
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