Effects of Heating Rate, Holding Temperature and Holding Time on Porosity and Pore Morphology of Aluminum Foams Fabricated by Powder Metallurgy Process

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  • Seki Hironori
    The Institute of Scientific and Industrial Research, Osaka University
  • Sasaki Shingo
    Department of Materials Science and Engineering, Shibaura Institute of Technology
  • Otsuka Masahisa
    Department of Materials Science and Engineering, Shibaura Institute of Technology
  • Nakajima Hideo
    The Institute of Scientific and Industrial Research, Osaka University

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  • 粉末冶金法を用いて作製したアルミニウムフォームの気孔率・気孔形態に及ぼす昇温速度・保持温度・保持時間の影響
  • フンマツ ヤキンホウ オ モチイテ サクセイシタ アルミニウム フォーム ノ キコウリツ キコウ ケイタイ ニ オヨボス ショウオン ソクド ホジ オンド ホジ ジカン ノ エイキョウ

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Abstract

  We studied effects of heating rate, holding temperature and holding time on porosity and pore morphology of aluminum foams fabricated by powder metallurgy process. When the temperature of the specimen exceeds the melting point, the specimen starts foaming. The porosity of the molten specimen increases with increasing furnace temperature, and the porosity of the aluminum foam reaches about 80%. Pore morphology of aluminum foam becomes inhomogeneous because the cell face of the aluminum foam collapses during the passage of time. The heating rate hardly affects the maximum porosity. The furnace temperature as holding temperature are closely related with the porosity of aluminum foam. The porosity map of heating rate and elapsed time was obtained, and the aluminum foam with arbitrary porosity can be made using the porosity map.<br>

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