全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:... H. Kubo , M. Sagawa , K. Hono
来源:[J].Acta Materialia(IF 3.941), 2015, Vol.84, pp.506-514Elsevier
摘要:Abstract(#br)We have investigated the effect of carbon on the coercivity and microstructure in fine-grained Nd–Fe–B sintered magnets fabricated by the pressless sintering method. The coercivity of the sample with the carbon content of 730 ppm (low-C) was 1.59 T while that of...
作者:... K. Hono , Y. Une , M. Sagawa
来源:[J].Ultramicroscopy(IF 2.47), 2013, Vol.132, pp.222-226Elsevier
摘要:Abstract(#br)The Nd-rich phases in pressless processed fine grained Nd–Fe–B sintered magnets have been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and three dimensional atom probe tomography (3DAP). The combination of the back...
作者:M. Sagawa , H. Kato
来源:[J].Journal of Magnetism and Magnetic Materials(IF 1.826), 2013, Vol.342, pp.4-10Elsevier
摘要:Abstract(#br)In order to understand the origin of the coercivity reduction in a sintered Nd–Fe–B magnet that is annealed below an optimal annealing temperature, we performed focused ion beam/scanning electron microscopy tomography of post-sinter annealed magnets. A number of...
作者:... T. Kohno , K. Hayakawa , M. Sagawa
来源:[J].Journal of Magnetism and Magnetic Materials(IF 1.826), 2006, Vol.310 (2), pp.e878-e880Elsevier
摘要:Abstract(#br)Temperature dependences of remanences in imperfectly, partially, magnetized Dy-free Nd 2 Fe 14 B sintered magnets were measured. The domain structures in demagnetized and magnetized states were observed by Kerr effect microscopy and by magneto-force microscopy. ...
作者:... T. Ohkubo , K. Hono , M. Sagawa
来源:[J].Journal of Magnetism and Magnetic Materials(IF 1.826), 2008, Vol.321 (8), pp.1100-1105Elsevier
摘要:Abstract(#br)Microstructures of fine grained Nd–Fe–B sintered magnets that were produced by the pressless process were investigated to understand the origin of the sudden coercivity decrease below a certain grain size. The intrinsic coercivity is inversely proportional to ln...
作者:M. Sagawa , K. Hiraga
来源:[J].Journal of Magnetism and Magnetic Materials(IF 1.826), 2002, Vol.242, pp.1329-1334Elsevier
摘要:Abstract(#br)The purpose of this study was to better understand the metallurgical transformations that occur during heat treatment of Nd-based magnets. DSC analysis and microstructural investigations of the grain boundaries with SEM and TEM were carried out. DSC permitted to opti...

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