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Diamond formation by thermal activation of graphite

Author

Listed:
  • A. V. Palnichenko

    (Unité de Physico-Chimie et de Physique des Matériaux, Université Catholique de Louvain
    Institute of Solid State Physics, Russian Academy of Sciences, Moscow district)

  • A. M. Jonas

    (Unité de Chimie et de Physique des Hauts Polymères, Université Catholique de Louvain)

  • J.-C. Charlier

    (Unité de Physico-Chimie et de Physique des Matériaux, Université Catholique de Louvain)

  • A. S. Aronin

    (Institute of Solid State Physics, Russian Academy of Sciences, Moscow district)

  • J.-P. Issi

    (Unité de Physico-Chimie et de Physique des Matériaux, Université Catholique de Louvain)

Abstract

Synthetic diamond is used in applications ranging from abrasives, tool coatings, bearing surfaces, microelectronics and optics to corrosion protection1,2. The first artificial synthesis used high-pressure techniques to produce diamond as the thermodynamically stable form3, but it can also be grown at low pressures as a metastable carbon phase1,2. Here we report the production of high-purity cubic diamond microparticles (10–100 µm), which form in a highly concentrated carbon-vapour phase, followed by deposition of the crystals on the substrate. The carbon-vapour phase is generated by thermal activation of graphite, and the fast initial growth-rates of diamond, in the range 100–500 µm s-1, are at least two orders of magnitude higher than previously reported1,2. We expect that tuning of experimental parameters to optimize the density of the carbon-vapour phase will allow us to grow larger diamond crystals, thereby opening a wider range of potential practical applications.

Suggested Citation

  • A. V. Palnichenko & A. M. Jonas & J.-C. Charlier & A. S. Aronin & J.-P. Issi, 1999. "Diamond formation by thermal activation of graphite," Nature, Nature, vol. 402(6758), pages 162-165, November.
    • Handle: RePEc:nat:nature:v:402:y:1999:i:6758:d:10.1038_46000
    DOI: 10.1038/46000
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