High-Performance Characteristics of Bonded Magnets Produced Using Sm 2 Fe 17 N x Powder Stabilized by Photoinduced Zinc Metal Coating

The surface of Sm 2 Fe 17 N x fine powder was stabilized by coating with zinc metal produced by the photodecomposition of diethylzinc (Zn(C 2 H 5 ) 2 ). The remanence ( B r ) and coercivity ( H cj ) values of the resulting Zn/Sm 2 Fe 17 N x powder were changed little by zinc coating, and remained at...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1996-07, Vol.35 (7B), p.L894
Main Authors: Izumi, Hirokazu, Machida, Ken-ichi, Shiomi, Atsushi, Masayuki Iguchi, Masayuki Iguchi, Gin-ya Adachi, Gin-ya Adachi
Format: Article
Language:English
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Summary:The surface of Sm 2 Fe 17 N x fine powder was stabilized by coating with zinc metal produced by the photodecomposition of diethylzinc (Zn(C 2 H 5 ) 2 ). The remanence ( B r ) and coercivity ( H cj ) values of the resulting Zn/Sm 2 Fe 17 N x powder were changed little by zinc coating, and remained at high levels even after heat treatment at 423 K, since the oxidation-resistance was improved by the zinc coating. Epoxy resin bonded magnets prepared using the Zn/Sm 2 Fe 17 N x powder had a maximum energy product ( BH m a x ) value of 176 kJ·m -3 , which did not change greatly after exposure to air. The irreversible flux loss of the bonded Zn/Sm 2 Fe 17 N x magnet was smaller than that of the uncoated Sm 2 Fe 17 N x magnet.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.35.L894