THERMOBARIC SINTERING OF THE DIAMOND-Fe3C COMPOSITE AND ITS STRUCTURAL FEATURES

  • D. Korostyshevskiy V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • А. Chumak V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • O. Bykov I.M. Frantsevich Institute of Materials Science Problems of the National Academy of Sciences of Ukraine
  • Yu. V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • D. Stratiichuk V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • O. V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
Keywords: diamond, iron carbide, high pressure, composite, structure

Abstract

The composite samples were produced by the sintering of the diamond-Fe3C system using infiltration of the diamond micropowders by the iron carbide melt under high pressure of 7.7 GPa and high temperature of 2100 K. The composite samples contain diamond in the amount of 92.1 vol.% and iron carbide in the amount of 7.9 vol.%. The microstructure of the composite is characterized by the presence of a diamond frame with a strong bond between the diamond grains. It was established that the Fe3C phase has the form of macroinclusions in the intergranular space of diamond particles into the structure of the composite

Published
2023-08-25
Issue
Vol 25 No 1 (2022): Tooling marerials science
Section
Instrumental, structural and functional materials based on diamond and cubic bor