Subscribe to the EPMA Mailing List

POROUS PERMEABLE MATERIALS FROM TITANIUM POWDERS WITH VARIOUS PARTICLE SHAPE

  • : Vadim S1, Alexander Taraikovich, Sergey Bedenko
  • : 1Powder Metallurgy Institute
  • : PDF Download
  • : 2014

Abstract

Experimental samples have been produced from a mixture of titanium powders with spherical particle shape (titanium powder of VT1-0 grade, fraction 0.2-0.315 mm) and with sponge particle shape (titanium powder of TPP-5 grade, fraction 0.2-0.315 mm). The powders were mixed in a granulator with an addition of 5 wt% of aqueous polyvinyl alcohol solution. Some samples were obtained by uniaxial compression in a metal mold, and some were obtained by pressing through elasticised gores (PPU-1 grade polyurethane with Shore A hardness of 60, 75 and 92). Pressure of the compaction was 100-210 MPa; sintering temperature was 1050 oC; duration was 70 min. Properties of the sintered samples were investigated on the following parameters: porosity, maximal and average pore sizes; permeability coefficient. The morphology of the outer surface of PPM samples was investigated by “Citoval 2” optical microscope of the “Carl Zeiss Jena” company, Germany. Optimal content of spherical particles in a mixture of titanium powders has been identified as from 60 to 80 wt%. The content of spherical particles lower than 60% prevents from substantially increasing the porosity, permeability and average pore size; and increase in content over 80% does not allow to obtain samples with the required strength.

Free

Other publications you may be interested in:

Go To Top