MA法およびPMGA法によるNb_3Al組成粉末の放電プラズマ焼結 Spark Plasma Sintering of Nb_3Al Alloy Powder by MA and PMGA Method

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We synthesized the Nb-Al alloy powder from Nb and Al elemental powders by Mechanical Alloying which provides the nanometer size crystals. Mixing ratio of Nb and Al was 7.5mass%Al corresponding to the Nb<SUB>3</SUB>Al composition. After 720 sec milling, the grain size of milled powder was about 3nm. Spark Plasma Sintering system was applied to sinter this MA powder. At the same time, the powder obtained by Plasma Melt Gas Atomize method (Nb-26.1at%Al) was sintered by SPS for comparison. Those SPSed compacts were investigated by SEM observation, EDX analysis, X-ray diffraction and Vickers hardness measurement at high temperature.<BR>The results obtained were as follows;<BR>(1) The MA powder, consisting of super saturated solid solution of Nb and Al, melted partially during SPS at 1773 K, however, the PMGA powder, consisting of mixed structure of Nb and Nb<SUB>3</SUB>Al, didn't melted at the same temperature.<BR>(2) The compact of MA powder by SPS had a mixed structure of Nb and Nb<SUB>2</SUB>Al, which was too fine to determine by SEM. On the other hand, the mixed structure consisting of Nb<SUB>2</SUB>Al grains and Nb<SUB>3</SUB>Al grains was formed in compact of PMGA powder.<BR>(3) Vickers hardness of SPSed compact of MA powder was higher than that of PMGA powder at R.T.-1 073K.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 43(10), 1198-1202, 1996-10-15

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002260775
  • 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
    4057322
  • 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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