Abstract
A novel hybrid ultrahard polycrystalline composite material has been produced by the reinforcement of the polycrystalline diamond composite thermostable material with a CVD grown polycrystalline diamond. It has been found that a thermal treatment of a polycrystalline diamond grown at high pressure ensures an increase of the CVD diamond hardness from 77 to 140 GPa. Tests of drilling tools have shown that in turning granite of the XI drillability index the wear intensity of rock destruction elements of the hybrid ultrahard material is lower than that of rock destruction elements of polycrystalline diamond composite thermostable material by a factor of 14.
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Original Russian Text © A.A. Shul’zhenko, E E. Ashkinazi, A.N. Sokolov, V.G. Gargin, V.G. Ral’chenko, V.I. Konov, L.I. Aleksandrova, R.K. Bogdanov, A.P. Zakora, I.I. Vlasov, I.A. Artyukov, Yu.S. Petronyuk, 2010, published in Sverkhtverdye Materialy, 2010, Vol. 32, No. 5, pp. 3–14.
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Shul’zhenko, A.A., Ashkinazi, E.E., Sokolov, A.N. et al. Novel hybrid ultrahard material. J. Superhard Mater. 32, 293–300 (2010). https://doi.org/10.3103/S1063457610050011
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DOI: https://doi.org/10.3103/S1063457610050011