スプレー造粒粉を用いたNd-Fe-B焼結磁石の磁気特性(III) Magnetic Properties of Nd-Fe-B Magnets Sintered Using Granulated Powders by Spray Drying Method(III)

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抄録

Nd-Fe-B alloy powder was granulated by spray drying method using organic binder consisted of polyvinylalcohol (PVA) or carboxymethylcellulose (CMC) with different tensile strength, in order to improve the powder flowability during feeding and compacting. The relationships between binder composition, polymer/plasticizer ratio and content of binder, and granulated powder characteristics or magnetic characteristics were investigated. By using a polymer with high tensile strength, the bonding strength between alloy powders increased, so that the powder flowability of granulated powders was improved. After compacting these powders in a magnetic field, compacted bodies were heated at 673K in H2. About 96% of carbon in binder was removed, although the oxygen in binder remained. In the case of high tensile strength polymer, remanences (Br) of sintered magnets decreased by about 20%, as compared with those of low tensile strength one. However, by increasing the plasticizer content in organic binder both of Br and maximum energy product (BH)max were improved remarkably.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 44(8), 775-780, 1997-08-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002014450
  • 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
    4275744
  • 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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