Sm_2Fe_<17>N_3新磁石の発見 The Discovery of Sm_2Fe_<17>N_3 Permanent Magnet Material

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We discovered a new compound Sm<SUB>2</SUB>Fe<SUB>17</SUB>N<SUB>3</SUB> in 1987 through the investigation of the structural and magnetic properties of Fe-N-X ( where X denotes an additive element ). The Sm<SUB>2</SUB>Fe<SUB>17</SUB>N<SUB>3</SUB> is a new type of magnet material which is prepared by introducing nitrogen atoms into the interstitial sites of the Sm<SUB>2</SUB>Fe<SUB>17</SUB> crystal under a nitrogen-containing atmosphere at elevated temperatures. The Sm<SUB>2</SUB>Fe<SUB>17</SUB>N<SUB>3</SUB> shows excellent intrinsic magnetic properties (saturation magne-tization M<SUB>s</SUB> = 1.57 T, the anisotropy field H<SUB>a</SUB> = 21 MA/m and Curie temperature T<SUB>c</SUB> = 746 K). The value of the theoretical maximum energy product, (BH)<SUB>max</SUB> amounts to 490 kJ/m<SUP>3</SUP>, being a match for the one of the Nd<SUB>2</SUB>Fe<SUB>14</SUB>B. We have succeeded in developing high performance Sm-Fe-N bonded-magnets; compression-molding magnet with (BH)<SUB>max</SUB> of 160 kJ/m<SUP>3</SUP> and injection-molding magnets with 110 kJ/m<SUP>3</SUP> have been fabricated so far. Mn-added Sm-Fe-N compacted powder magnet comprised of coarse powder has also been obtained. The Mn-added magnet has good thermal stability and excellent oxidation-resistance.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 43(1), 59-65, 1996-01-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002011056
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    3918035
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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