Oxidation of CVD diamond powders

Jae K. Lee, Michael W. Anderson, Fraser A. Gray, Phillip John, Jin Y. Lee, Young Joon Baik, Kwang Young Eun

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Spherical diamond powders have been synthesised by a multi-cathode d.c. discharge in hydrogen-methane mixtures under conditions conducive to homogeneous nucleation. The polycrystalline powder can be deposited at rates of up to 100 mg/h at substrate temperatures below which thin film diamond growth is negligible. The diameters of the diamond spheres vary from 150 to 600 nm depending on the radial distance on the substrate. The diamond powders have been thermally oxidised in the range of 450-610 °C under dry oxygen. Depending on the degree of thermal contact between the powders and the heater block the rate of oxidation can be 'explosive' in which a rapid rise in temperature is observed caused by the exothermic nature of the oxidation of diamond. © 2004 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1070-1074
Number of pages5
JournalDiamond and Related Materials
Volume13
Issue number4-8
DOIs
Publication statusPublished - Apr 2004

Keywords

  • CVD
  • DC discharge
  • Diamond
  • Diamond powders

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    Lee, J. K., Anderson, M. W., Gray, F. A., John, P., Lee, J. Y., Baik, Y. J., & Eun, K. Y. (2004). Oxidation of CVD diamond powders. Diamond and Related Materials, 13(4-8), 1070-1074. https://doi.org/10.1016/j.diamond.2004.01.026