メカニカルアロイングによるNd-Fe-B合金の作製 Production of Nd-Fe-B alloys by mechanical alloying

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Elemental neodymium, iron, and boron powder mixtures were mechanically alloyed in argon, hydrogen and nitrogen atmospheres. The resultant powders and those annealed at various temperatures were examined by X-ray diffraction, optical microscopy, and vibrating sample magnetometer. It was found that these powder mixtures absorbed hydrogen and nitrogen during the mechanical alloying. Heat treatment of the mechanically alloyed powders prepared in hydrogen atmosphere resulted in desorption of hydrogen gas. The resultant powders consisted of Nd<SUB>2</SUB>Fe<SUB>14</SUB>B ferromagnetic crystallites and showed a high coercivity value. On the other hand, heat treatment of the mechanically alloyed powders prepared in nitrogen atmosphere did not result in desorption of nitrogen gas. The resultant powders consisted of iron and neodymium nitrides and showed a coercivity as low as that of the powder mixtures. The Nd-Fe-B powders prepared by mechanical alloying in hydrogen atmosphere were magnetically isotropic.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(7), 692-696, 1998-07-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002052508
  • 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
    4535715
  • 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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