MIMプロセスによる軟質磁性材料(センダスト)の磁気特性 Magnetic Properties of Injection Molded Soft Magnetic Materials(Sendust)

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For miniaturization and complication of the shape of electronic devices in recent years, improvement of magnetic properties are also being required to the soft magnetic components. Fe-Si-Al alloy is well known to be a soft magnetic material suited for a magnetic head because of high permeability and magnetic flux density as well as high wear-resistance. However, this alloy is very brittle and difficultly workable. Therefore, metal injection molding (MIM) process is hoped to be a suitable production route for hard and brittle materials such as Fe-Si-Al alloy because of providing net shape components.<BR>In this study, the effect of MIM process conditions on the magnetic properties of Fe-Si-Al alloys has been investigated using a gas-atomized powder. Since this alloy melted at high temperature over 1523K, the optimum sintering temperature was found to be 1523K at which the obtained relative density was more than 98%. However, the magnetic properties of the compacts sintered in both hydrogen and vacuum atmospheres were relatively inferior to that of the wrought materials. This was seemed that the domain wall migration was prevented by the fine grain size and the retained oxides. By the continuous process including the debinding and sintering steps together, the compacts showed good magnetic properties because of the small amomts of oxides and coarse grain size.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 44(11), 1024-1028, 1997-11-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002261684
  • 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
    4344273
  • 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  CJP引用  NDL  J-STAGE 
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