Journal of Porous Materials

, Volume 19, Issue 1, pp 21–27 | Cite as

Study of gradual porous metallic membranes obtained by powder sedimentation

  • Ioan Vida-Simiti
  • Nicolaie Jumate
  • Gyorgy Thalmaier
  • Niculina Sechel
  • Valentin Moldovan


In our preliminary studies the possibility of obtaining sintered porous materials with gradual structure by sedimentation of metallic powder was demonstrated. In this paper we continued our studies on the influencing factors of the sedimentation of metallic powders. Irregular and spherical nickel particles were used having a grain size in the 2–90 μm range measured by the laser scattering particle size analyzer. The particles with irregular shape and larger diameter can sediment faster than the spherical and the smaller diameter particles. The sedimentation rate is also influenced by the sedimentation medium and the quantity of the dispersant agent. Deviations from Stokes law was observed in the case of the irregular particles. The gradual structure is influenced by the sintering regime and the powders characteristics too. The obtained structures were characterized by scanning electron microscopy and mercury porosimetry. The permeability and the filtration fineness were also determined.


Sedimentation Metallic membrane Sintered porous material Porosity gradient 



This work was supported by CNCSIS—UEFISCSU, project number PNII—IDEI 749/2009.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Ioan Vida-Simiti
    • 1
  • Nicolaie Jumate
    • 1
  • Gyorgy Thalmaier
    • 1
  • Niculina Sechel
    • 1
  • Valentin Moldovan
    • 1
  1. 1.Department of Materials Science and TechnologyTechnical University of Cluj-NapocaCluj, NapocaRomania

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