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  1. Article

    Open Access

    Kinetic Regularities of the Synthesis of Silica Nanoparticles by Heterogeneous Hydrolysis of Tetraethoxysilane Using L-Arginine as a Catalyst

    The kinetics of the synthesis of silica nanoparticles (<50 nm) has been studied under the conditions of heterogeneous hydrolysis of tetraethoxysilane (TEOS) using L-arginine as an alkaline catalyst. The rates of ...

    V. M. Masalov, N. S. Sukhinina, D. N. Sovyk, V. G. Ralchenko… in Colloid Journal (2024)

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  2. No Access

    Article

    Synthesis of the Diamond‒SiO2 Composites with the Properties of Photonic Crystals in the Visible Spectral Range

    The chemical vapor deposition synthesis of periodic structures in the form of single-crystal diamond–SiO2 nanosphere composites, which exhibit the properties of photonic crystals in the visible spectral range, ar...

    D. N. Sovyk, K. A. Odintsov, A. P. Bolshakov, S. A. Dyakov, S. S. Savin… in Doklady Physics (2023)

  3. No Access

    Article

    Sol-Gel Synthesis of Lanthanum Cobaltite Powders with Added Strontium and Calcium

    Powders with the composition La1–xSr(Ca)õCoO3 (x = 0.2) were obtained using the sol-gel method. A microwave setup (radiation power 90 W, frequency 2450 MHz) and a drying cabinet (temperature 180°C) were used to d...

    E. A. Ermakova, S. S. Strel’nikova, A. S. Anokhin, A. N. Rogova… in Glass and Ceramics (2021)

  4. No Access

    Article

    Effect of crystal structure on the tribological properties of diamond coatings on hard-alloy cutting tools

    Micro- and nanocrystalline uniform diamond coatings with barrier tungsten layers for improved adhesion were deposited in a microwave plasma from methane-hydrogen mixtures on cemented carbide WC–6% Co substrate...

    E. E. Ashkinazi, V. S. Sedov, M. I. Petrzhik, D. N. Sovyk… in Journal of Friction and Wear (2017)

  5. No Access

    Article

    Synthesis and do** of microcolumn diamond photoemitters with silicon-vacancy color centers

    The method of epitaxial growth of localized photoluminescence sources in the form of the ordered microcolumn diamond structures with silicon-vacancy (SiV) color centers is implemented. The process is based on ...

    D. N. Sovyk, V. A. Shershulin, V. G. Ralchenko… in Bulletin of the Lebedev Physics Institute (2015)

  6. No Access

    Article

    Strength of synthetic diamonds under tensile stresses produced by picosecond laser action

    Results of an experimental-theoretical study of spallation in synthetic diamonds are presented. In this study, data were first obtained on dynamic tensile strength of poly- and singlecrystal diamond samples at...

    S. A. Abrosimov, A. P. Bazhulin… in Journal of Applied Mechanics and Technical… (2015)

  7. No Access

    Article

    Experimental investigation into polycrystalline and single-crystal diamonds under negative pressures formed by picosecond laser pulses

    Results of the experimental investigation of the spallation phenomenon in polycrystalline and single-crystal synthetic diamond are presented. The shock-wave action on the target was formed by a laser pulse wit...

    S. A. Abrosimov, A. P. Bazhulin, A. P. Bolshakov, V. I. Konov… in Doklady Physics (2014)

  8. No Access

    Article

    Effect of the Nature of Carbon Nanotubes on the Structure and Strength of Ceramic Composites

    A composite material based on α -Al2O3 and two types of carbon nanotubes obtained from a methane-hydrogen mixture and propane-butane mixture was synthesized. The results of vacuum sintering and a comparative anal...

    N. A. Fedosova, P. P. Faikov, N. A. Popova, Trän Thi Thuy Duong… in Glass and Ceramics (2014)

  9. No Access

    Article

    Structure and properties of impact diamonds from the Popigai Deposit and polycrystals based on them

    Properties of impact diamonds from the Popigai Deposit have been studied in a free state and in a composition of a compact. Raman spectra have been taken of the initial micron powders and polycrystals HP-HT si...

    A. A. Shul’zhenko, E. E. Ashkinazi, A. N. Sokolov… in Journal of Superhard Materials (2014)

  10. No Access

    Article

    Semiconductor properties of nanocrystalline diamond electrodes

    The semiconductor properties of nitrogenated nanocrystalline diamond electrodes and their corrosion transformations caused by electrochemical experiment in indifferent electrolyte (1 M K2SO4) were studied by the ...

    M. D. Krotova, Yu. V. Pleskov, A. A. Khomich… in Russian Journal of Electrochemistry (2014)

  11. No Access

    Article

    Photonic crystals of diamond spheres with the opal structure

    Opal samples consisting of diamond spheres have been synthesized by chemical deposition in microwave plasma from a CH4/H2 mixture using templates of silicon inverse opal. The optical investigations have confirmed...

    D. N. Sovyk, V. G. Ralchenko, D. A. Kurdyukov… in Physics of the Solid State (2013)

  12. No Access

    Article

    Growth of single-crystal diamonds in microwave plasma

    A microwave plasma (2.45 GHz) was used for depositing single crystal diamond layers at the deposition rate up to 40 μm/h in hydrogen-methane mixtures on the substrates from natural and synthetic diamond with t...

    A. P. Bolshakov, V. G. Ralchenko, A. V. Polskiy, V. I. Konov… in Plasma Physics Reports (2012)

  13. No Access

    Article

    Strength of optical quality polycrystalline CVD diamond

    The three-point loading method is used to the measure the fracture strength σ f of polycrystalline CVD diamond plates with thickness in the range of h = 0.06–1.0 mm. Optical qua...

    V. G. Ralchenko, E. Pleiler, D. N. Sovyk… in Inorganic Materials: Applied Research (2011)

  14. No Access

    Article

    Diamond direct and inverse opal matrices produced by chemical vapor deposition

    Diamond structures with inverse and direct three-dimensional opal lattices with period of 250–530 nm were grown by microwave plasma deposition in methane-hydrogen mixtures using porous SiO2 opal matrix and its Si...

    V. G. Ralchenko, D. N. Sovyk, A. P. Bolshakov, A. A. Homich… in Physics of the Solid State (2011)