Optimizing Calcium Addition for Fabricating Aluminum Foams with Different Pore Sizes

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  • Cheng Ying
    School of Materials Science and Engineering, Tsinghua University
  • Li Yanxiang
    School of Materials Science and Engineering, Tsinghua University Key Laboratory for Advanced Materials Processing Technology
  • Chen Xiang
    School of Materials Science and Engineering, Tsinghua University Key Laboratory for Advanced Materials Processing Technology
  • Liu Zhiyong
    School of Materials Science and Engineering, Tsinghua University
  • Zhou Xu
    School of Materials Science and Engineering, Tsinghua University
  • Wang Ningzhen
    School of Materials Science and Engineering, Tsinghua University

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抄録

<p>This study mainly investigated the influence of Calcium (Ca) addition on the pore size of aluminum foams made by using Cu–TiH2 composite powder as foaming agent. The Ca addition required for fabricating aluminum foams with different pore sizes was experimentally investigated. Two possible foam stabilization mechanisms were discussed and compared. For foams with pore size about 3 mm, the optimized Ca addition is 1 mass%. For foams with pore size about 2 mm, the optimized Ca addition is 3 mass%∼5 mass%. The main role of increasing melt viscosity in stabilizing foams is to prevent liquid films from thinning and rupture, rather than to prevent bubbles floating and escaping from the melt surface.</p>

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 59 (8), 1367-1374, 2018-08-01

    公益社団法人 日本金属学会

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