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Ti2AlC And Ti3SiC2 MAX Phase Foams: Processing, Porosity Characterization And Connection Between Processing Parameters And Porosity.

  • : Beatriz Velasco1, Thomas Hutsch2, Elena Gordo3, Thomas Weißgärber2, Sophia Tsipas1
  • : 1UC3M, 2Fraunhofer Institute for Manufacturing and Advanced Materials, 3Universidad Carlos III
  • : PDF Download
  • : 2016


MAX phases Ti2AlC and Ti3SiC2 foams with controlled porosity and pore size were produced using the space holder (SH) method. The foams were processed using water-leachable crystalline carbohydrate as SH that involves: mixing, cold isostatic pressing, dissolution and sintering. Three combinations of volume percentage (20%-60%) and size distribution (250-1000 µm) of SH were introduced during mixing. The foams were characterized and compared with the material without SH. The characterization includes: pore morphology (overall, open and closed porosity by Archimedes method) and permeability. Foams with porosity up to about 60 vol% and pore size distribution ranging from about 250 to 1000 µm were produced. Experimental porosity was compared to the theoretical expected porosity. The results show a bimodal porosity that can be customized by the sintering and the SH. This study connects the processing parameters to the porosity created and allows to control porosity and pore size to produce tailor-made properties.


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