Mechanical properties of the 3D polymerized, sp2–sp3 amorphous, and diamond-plus-graphite nanocomposite carbon phases prepared from C60 under high pressure

  • V. V. Brazhkin
    Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow 142092, Russia
  • A. G. Lyapin
    Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow 142092, Russia
  • S. V. Popova
    Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow 142092, Russia
  • Yu. A. Klyuev
    Russian Research Institute of Diamonds, 119110, Moscow, Russia
  • A. M. Naletov
    Russian Research Institute of Diamonds, 119110, Moscow, Russia

書誌事項

公開日
1998-07-01
DOI
  • 10.1063/1.368021
公開者
AIP Publishing

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説明

<jats:p>Mechanical properties (Vicker’s hardness, Young’s modulus, and fracture toughness coefficient) have been studied for the three-dimensionally polymerized, amorphous, and nanocrystalline diamond-plus-graphite composite carbon phases prepared from fullerite C60 by temperature treatment under pressure. The hardness was found to increase gradually with the synthesis temperature. The experimental values of hardness are well correlated with the density of samples regardless of the phase structural nature, displaying the same dependence as amorphous carbon films. It has been shown that the hardness and Young’s modulus of both polymerized crystalline and disordered phases, though not as high as those of diamond, are comparable to the properties of cubic BN, while fracture toughness coefficient can be higher than that for diamond. An unusual combination of high hardness and high plasticity has been established for strongly polymerized C60.</jats:p>

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