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Preparation of ring-shaped composite bonded magnets with continuously controlled anisotropy distribution for internal space


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Title: Preparation of ring-shaped composite bonded magnets with continuously controlled anisotropy distribution for internal space
Authors: Yamashita, F / Yamada, O / Ohya, Shiho / Kobayashi, O / Nakano, M / Fukunaga, Hirotoshi
Issue Date: 1-Jan-2010
Publisher: IOP Publishing
Citation: Journal of Physics: Conference Series, 200(8), 082027; 2010
Abstract: We have already reported an advanced method for producing a radially-anisotropic rare earth composite bonded magnet with continuously controlled direction of anisotropy. The magnet has been applied to an inner rotor as a practical usage. In this study, the outstanding preparation method was adopted into the preparation of a magnet applied for an outer rotor. An optimized condition of extrusion and compaction at an elevated temperature could be obtained. In addition, a low pressure configuration to the ring-shaped magnet from plural preformed magnets was carried out, which had specific distribution of magnetic anisotropy for internal space for a small motor, by using self recoverability based on the viscous deformation without an alignment field. No deterioration of magnetic properties was detected through the process even if those magnets were miniaturized. Resultantly, the (BH)max of a ring-shaped magnet with the continuously controlled direction of magnetic anisotropy attained the value of 186 kJ/m3, and we obtained sine-wave magnetic anisotropy distribution, even if those magnets were miniaturized.
Description: International Conference on Magnetism, ICM 2009; Karlsruhe; 26 July 2009 through 31 July 2009
URI: http://hdl.handle.net/10069/24974
ISSN: 17426588
DOI: 10.1088/1742-6596/200/8/082027
Rights: © 2010 IOP Publishing Ltd. / This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics: Conference Series. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at http://dx.doi.org/10.1088/1742-6596/200/8/082027.
Type: Journal Article
Text Version: author
Appears in Collections:Conference Paper

Citable URI : http://hdl.handle.net/10069/24974

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