Formation and Soft Magnetic Properties of Co-Fe-Si-B-Nb Bulk Glassy Alloys

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Soft ferromagnetic bulk glassy alloys in Co–Fe–Si–B base system were formed in the diameter range up to 1 mm at the composition of (Co<SUB>0.705</SUB>Fe<SUB>0.045</SUB>Si<SUB>0.1</SUB>B<SUB>0.15</SUB>)<SUB>96</SUB>Nb<SUB>4</SUB> by copper mold casting. Since no bulk glass formation has been obtained in the Co–Fe–Si–B system, the addition of 4%Nb is very effective for the increase in the glass-forming ability. The effectiveness was interpreted by satisfaction of the three component rules for formation of bulk glassy alloys. The bulk glassy alloys exhibit the glass transition before crystallization. The glass transition temperature (<I>T</I><SUB>g</SUB>), the supercooled liquid region defined by the difference between <I>T</I><SUB>g</SUB> and crystallization temperature (<I>T</I><SUB>x</SUB>), <I>ΔT</I><SUB>x</SUB> (=<I>T</I><SUB>x</SUB>−<I>T</I><SUB>g</SUB>) and the reduced glass transition temperature (<I>T</I><SUB>g</SUB>⁄<I>T</I><SUB>l</SUB>) are 823 K, 37 K and 0.61, respectively. The bulk glassy alloys also exhibit soft magnetic properties with saturation magnetization (<I>I</I><SUB>s</SUB>) of about 0.60 T and low coercive force (<I>H</I><SUB>c</SUB>) below 3 A/m. The synthesis of the Co-based bulk glassy alloy rods with glass transition and good soft magnetic properties is important for future development as a new type of soft magnetic bulk material.

収録刊行物

  • Materials transactions

    Materials transactions 43(5), 1230-1234, 2002-05-01

    公益社団法人 日本金属学会

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被引用文献:  3件中 1-3件 を表示

各種コード

  • NII論文ID(NAID)
    10012323936
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    13459678
  • NDL 記事登録ID
    6181494
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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