Abstract
Polycrystalline diamond films were grown on different types of diamond composites in order to modify their morphology and surface properties. A DC arc-jet deposition system operated at Ar/CH4/H2 gas mixture was used to obtain diamond coatings on diamond-copper composites produced by explosive compression technique, while a DC plasma reactor operated at CH4/H2 feed gas was used to grow diamond films on B4C-carbon composites and sintered diamond compacts. Morphology, quality and stress in diamond crystallites before and after film deposition were studied with scanning electron microscopy and microRaman spectroscopy. Homoepitaxially grown films showed less defected structure with smaller content of nondiamond carbon impurities than the diamond deposited on copper grains. In all cases well-crystallized CVD diamond was produced with a good adhesion to the substrates, including those containing copper islands. It is concluded that the mechanical and thermal properties of diamond composites can be improved with CVD diamond layers.
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Ralchenko, V.G. et al. (1997). Chemical Vapor Deposition of Diamond Films on Diamond Compacts. In: Prelas, M.A., Benedictus, A., Lin, LT.S., Popovici, G., Gielisse, P. (eds) Diamond Based Composites. NATO ASI Series, vol 38. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5592-2_4
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DOI: https://doi.org/10.1007/978-94-011-5592-2_4
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