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2012 Fiscal Year Final Research Report

Consideration of Mass Production Technique of Lotus-Type Porous metal

Research Project

  • PDF
Project/Area Number 23760668
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Structural/Functional materials
Research InstitutionOsaka University

Principal Investigator

IDE Takuya  大阪大学, 産業科学研究所, 助教 (40507183)

Project Period (FY) 2011 – 2012
Keywordsポーラス金属 / ロータス型ポーラス金属 / 連続鋳造
Research Abstract

Porous metals with directional pores aligned in one direction, called as lotus or gasar metals, exhibit superior mechanical and thermal properties compared with other porous metals with spherical pore. Therefore, lotus metals are expected to be used as heat sinks, impact energy absorber, etc. Thus, extensive studies have been carried out to develop new fabrication techniques and improve their properties. Recently, we developed a safer and cheaper fabrication technique for the lotus metals. Lotus metals are fabricated by utilizing a hydrogen solubility gap during solidification. So far, a fabrication technique using high pressure hydrogen has been investigated. However, there were two experimental difficulties. One is the need for a high pressure chamber which is expensive. Another is the use of hydrogen gas, which is flammable and explosive. In order to overcome these problems, a novel technique which uses gas-forming compounds as a gas source is developed. This method is called as the thermal decomposition method (TDM); gas atoms can dissolve in the melt through the thermal decomposition of the compound containing a gas element. In the present study, lotus copper is fabricated through the thermal decomposition method combined with a continuous casting techni que.The copper was melted in a graphite crucible by induction heating. The copper melt dropped downward into a tundish, in which pellets of titanium hydride were supplied at a constant time interval in order to maintain the dissolving hydrogen constant. Then to solidify the melt continuously, a graphite dummy bar pulled molten copper through a cooling mold at a constant transfer velocity.Porous copper with directional pore aligned in one direction was fabricated with the solidification velocity 80mm/minute and with addition of a pellet in argon atmosphere of 0.1MPa. Lotus -type porous copper can be fabricated through thermal decomposition method by continuous casting technique.

  • Research Products

    (6 results)

All 2013 2012

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (4 results)

  • [Journal Article] Fabrication of Porous Aluminum with Directional Pores through Continuous Casting Technique2012

    • Author(s)
      T. Ide, Y. Iio, and H. Nakajima
    • Journal Title

      Meta l l. Mater. Trans. A

      Volume: 43A Pages: 5140-5152

    • Peer Reviewed
  • [Journal Article] Fabrication of porous aluminum and copper with unidirectional pores through thermal decomposition method2012

    • Author(s)
      H. Nakajima 、T. Ide
    • Journal Title

      Proceedings of Cellular Materials(CELLMAT2012)

      Volume: Vol.1 Pages: 1-4

    • Peer Reviewed
  • [Presentation] ガス化合物熱分解法により作製したロータス型ポーラス銅の気孔形成機構の検討2013

    • Author(s)
      井手 拓哉,森田 昌吾,中嶋英雄
    • Organizer
      日本金属学会
    • Place of Presentation
      東京都,東京理科大学
    • Year and Date
      2013-03-29
  • [Presentation] Fabrication of porous aluminum and copper with unidirectional pores through thermal decomposition method2012

    • Author(s)
      H. Nakajima、T. Ide
    • Organizer
      International Conference on Cellular Materials -CELLMAT2012
    • Place of Presentation
      Dresden, Germany
    • Year and Date
      2012-11-07
  • [Presentation] ガス化合物熱分解法を用いた連続鋳造によって作製されたロータス型ポーラス銅の気孔分布に及ぼすガス化合物の添加方法の影響2012

    • Author(s)
      宋 榮換,井手 拓哉,中嶋英雄
    • Organizer
      日本金属学会
    • Place of Presentation
      愛媛県,愛媛大学
    • Year and Date
      2012-09-18
  • [Presentation] ガス化合物熱分解法を適用した連続鋳造法によるロータス型ポーラス銅の気孔形態制御2012

    • Author(s)
      森田 昌吾,井手 拓哉,中嶋英雄
    • Organizer
      日本金属学会
    • Place of Presentation
      愛媛県,愛媛大学
    • Year and Date
      2012-09-18

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Published: 2014-09-25  

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