Journal of Superhard Materials

, Volume 39, Issue 2, pp 75–82 | Cite as

Phase transformations of n-layer graphenes into diamond at high pressures and temperatures

  • A. A. Shul’zhenko
  • L. Jaworska
  • A. N. Sokolov
  • V. G. Gargin
  • N. N. Belyavina
Production, Structure, Properties


The effect of high pressure (7.7 GPa) and temperature (1700°C) on the phase transformations of both graphene plates with a high degree of crystallinity having less than four layers and thickness not exceeding 5 nm and powders of multilayer graphenes (of 10–20 monolayers) and 8–12 nm in thickness was experimentally studied in the presence of carbon solvents (Ni–Mn alloy, iron). Factors both contributing and inhibiting the diamond synthesis from graphene in the presence of the solvents for carbon are defined. It is shown that the transformation of multilayer graphenes into diamond at high pressure and temperature by a two-stage scheme of the diamond synthesis (i.e., after three-dimensional structural ordering of graphene at the first stage) is preferable.


graphene graphite diamond synthesis phase transformation 


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Copyright information

© Allerton Press, Inc. 2017

Authors and Affiliations

  • A. A. Shul’zhenko
    • 1
  • L. Jaworska
    • 2
  • A. N. Sokolov
    • 1
  • V. G. Gargin
    • 1
  • N. N. Belyavina
    • 3
  1. 1.Bakul Institute for Superhard MaterialsNational Academy of Sciences of UkraineKievUkraine
  2. 2.The Institute of Advanced Manufacturing TechnologyKrakowPoland
  3. 3.Taras Shevchenko Kiev National UniversityKievUkraine

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