発泡アルミニウム製造におけるアルミニウム溶湯の増粘機構 Influence of Thickening Condition on Aluminum Foam Fabrication

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抄録

  Aluminum foams are manufactured using various viscosity increasing methods at present. Although it is well known that calcium addition is one of the most successful thickening processes for fabricating fine foams, the intimate mechanism is still lacking. The aim of this paper is the investigation of the detailed thickening mechanism and the influence of increase viscosity conditions on fabricating aluminum foams. Thickened samples were prepared using pure aluminum admixed various contents of calcium or aluminum powder as viscosity increasing agents. Microstructure analysis of thickened samples was carried out. As quantitative evaluations, the measurements of stirring torques and oxygen contents were also performed. The effect of aluminum powder addition on the melt viscosity and microstructure of thickened sample cannot be confirmed. In the case of calcium addition, the stirring torques increase with the calcium content and the agitating time till the values achieve the stationary stage. More the oxide grains formed by folded oxide film are observed in the thickened sample which contains more the calcium amount. In addition, the oxygen content increases with the stirring time and the quantity of calcium addition. Thus, it is found that the oxide grain causes to increase the melt viscosity. Further, those content can be controlled by adjusting the calcium addition and the stirring time.<br>

収録刊行物

  • 日本金屬學會誌 = Journal of the Japan Institute of Metals  

    日本金屬學會誌 = Journal of the Japan Institute of Metals 72(2), 73-79, 2008-02-01 

    The Japan Institute of Metals

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各種コード

  • NII論文ID(NAID)
    10021149553
  • NII書誌ID(NCID)
    AN00062446
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00214876
  • NDL 記事登録ID
    9371167
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-314
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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