2012 Fiscal Year Final Research Report
Development of Dy-less High Coercivity Magnets Using TransitionFrom Amorphous Phase to Crystalline One
| Project/Area Number |
22360128
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Nagasaki University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NAKANO Masaki 長崎大学, 工学研究科, 准教授 (20274623)
YANAI Takeshi 長崎大学, 工学研究科, 助教 (30404239)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 磁性材料 / 保磁力 / Nd-Fe-B / 結晶化 / 粒界拡散 / マイクロクロマグネティクス |
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| Research Abstract |
Computer simulation about relationship between coercivity of Nd-Fe-B magnet powders and recovery of magnetic anisotropy due to Dy diffusion clarified that the Dy diffusion from coating layers on powder surface is effective in improving the coercivity of isotropic Nd-Fe-B magnet powders with fine grains. The diffusion from a Dy-coating layers into grain boundaries was realized by using the transition from amorphous state to crystalline one at a low temperature and for short time. The coercivity of isotropic Nd-Fe-B magnet powders was improved by approximately 500 kA/m without remarkable reduction of remanence.
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[Presentation]2010
Author(s)
福永博俊,杉元祐一,中野正基,柳井武志,福永博俊,杉元祐一,中野正基,柳井武志
Organizer
電気学会マグネティックス研究会
Place of Presentation
東京
Year and Date
20101200
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