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Application of Electrical Discharge Methods for Handling and Consolidation of Powder Composite Materials

  • : Grigoryev E.G. 1, Yurlova M.S. 1, Olevsky E.A. 1, Sizonenko O.N. 2
  • : 1KeyMoscow Engineering Physics Institute, 2Institute of Pulse Processes and Technologies of the National Academy of Sciences of Ukraine
  • : 2013, Vol 2, p. 323-328
  • : PDF Download
  • : 2013

Abstract

The influence of high voltage electrical discharge was investigated on the regularities of morphometric characteristics and kinetics of dispersing Fe and Ti powder mixture. It was found that the electrical discharge machining produces the formation of cementite Fe3C, and such phases as TiC, FeB, Fe2Ti. The percentage of TiC increases with the increase in current density in the discharge channel. After electrical discharge machining these composite powders were consolidated by spark plasma sintering. Microhardness of the consolidated samples was determined by Vickers Hardness Testing using HVS-1000. It was found that the density and microstructure of consolidated composite powder material essentially depends from electrical pulse current parameters and applied mechanical pressure. The high density and high strength of composite material reached its maximum values at certain magnitudes of applied pressure and electrical pulse current parameters.

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