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Pore morphology of lotus-type porous silver fabricated by Gasar process in oxygen atmosphere
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Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming Institute of Precious Metals,Kunming Institute of Precious Metals

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TG146

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    Abstract:

    Directional solidification of metal/gas eutectic (Gasar) is a novel process for fabricating porous metals with oriented pores parallel to the solidification direction. By use of the developed Gasar apparatus, lotus-type porous silver samples with different porosities have been fabricated in oxygen atmosphere. In this paper, we studied the effects of gas pressure on porosity, pore nucleation, pore size and distribution. It is concluded that the porosity and the pore size in the lotus-type porous silver were significantly affected by pressures of oxygen. The porosity increases with increasing pressure of oxygen. The average pore diameter decreases with increasing of oxygen pressure.

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[liang juan, Jin Qinglin, Yang Tianwu, Li Zaijiu, Xie Ming. Pore morphology of lotus-type porous silver fabricated by Gasar process in oxygen atmosphere[J]. Rare Metal Materials and Engineering,2016,45(10):2519~2523.]
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History
  • Received:June 26,2014
  • Revised:November 10,2014
  • Adopted:March 19,2015
  • Online: November 10,2016
  • Published: