Paper Title:
Preliminary Studies and Researches on the Elaboration of Gradual Porous Sintered Structures by Powder Sedimentation
  Abstract

Spherical bronze powders were used for studies the obtaining of gradual porous structures by sedimentation and sintering methods. The powder size classes above 100 μm were used for the manufacturing of the macroporous support by spreading the powder into the sintering die. Sintering was conducted in vacuum (10-4 Torr) at a temperature of 750 °C for 40 minutes. On the macroporous support a layer of fine powder fraction was deposited by gravitational sedimentation. The deposited layers were consolidated by sintering at 750 °C for 30 minutes. The analysis of the gradual porous layers was done using scanning electron microscopy and mercury porosimetry. The fluids viscosity influences the sedimentation velocity of particles. The height of the column directly affects the quality of porous structure. If the sedimentary column is short, the turbulences created by adding the suspension of the dispersed powder in the sedimentary tube are more harmful.

  Info
Periodical
Edited by
Ionel Chicinaş and Liviu Brânduşan
Pages
137-140
DOI
10.4028/www.scientific.net/MSF.672.137
Citation
I. Vida-Simiti, N. Jumate, V. Moldovan, N. Sechel, G. Thalmaier, "Preliminary Studies and Researches on the Elaboration of Gradual Porous Sintered Structures by Powder Sedimentation", Materials Science Forum, Vol. 672, pp. 137-140, 2011
Online since
January 2011
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