Technique of formation of an axisymmetric heterogeneous flow during thermal spraying of powder materials

VI Kuz'min, AA Mikhal'Chenko, OB Kovalev… - Journal of Thermal …, 2012 - Springer
The paper presents an investigation of a unit of annular injection of powder materials into a
thermal plasma flow. The unit is designed for the electric-arc direct-current plasma torch with …

Physical Processes of SiO2 Spherical Particle Formation in Thermal Plasma Flow

VA Vlasov, VV Shekhovtsov, OG Volokitin… - Russian Physics …, 2018 - Springer
The paper presents the structural investigations of hollow, spherical powder obtained from
the natural siliceous material using the thermal plasma treatment. Experiments show that the …

Diagnostics of powder particle parameters under laser radiation in direct material deposition

DV Sergachev, OB Kovalev, GN Grachev… - Optics & Laser …, 2020 - Elsevier
A comparative analysis is presented for the particle velocity and temperature in the light field
of a continuous wave (CW) or pulsed CO 2-laser in a coaxial jet gas flow. The problems of …

Laser-optic measurements of velocity of particles in the powder stream at coaxial laser cladding

DV Sergachev, AA Mikhal'chenko, OB Kovalev… - Physics Procedia, 2014 - Elsevier
The problems of particle velocity and temperature measurement can be solved with
commonly-known methods of registration based on spectrometry and a complex of laser and …

Повышение эффективности плазменного напыления порошковых покрытий

ВИ Кузьмин, ЕВ Картаев, СП Ващенко… - Вестник Югорского …, 2014 - cyberleninka.ru
Проведены теплофизические и технологиче-ские исследования эффективности
формиро-вания высокотемпературного гетерогенного потока и напыления покрытий из …

Structure and Phase Composition of Natural Magnesite in 1173–6500 K Temperature Range

VV Shekhovtsov, YA Abzaev, OG Volokitin… - Russian Physics …, 2022 - Springer
The paper presents research results of the thermal effect on the structure, phase
composition, and morphology of natural magnesite (MgCO3) from the Savinsky deposit …

On the Possibility of Synthesis of Silicon Carbide Using an Indirect-Action Plasma Gun

RD Gerasimov, VV Shekhovtsov, YZ Vasil'eva… - Journal of Engineering …, 2024 - Springer
The paper presents the results of experimental and theoretical investigations into the
synthesis of silicon carbide using the energy of thermal plasma. The experimental …

Formation of highly concentrated heterogeneous flows during plasma deposition of powder materials

VI Kuzmin, IP Gulyaev, DV Sergachev… - Journal of Physics …, 2021 - iopscience.iop.org
Most industrial installations for plasma spraying of powder materials are equipped by
nozzles with local (radial) powder input into the thermal plasma jet generated by the plasma …

Determination of temperature in a plasma jet emanating from a plasma torch with sectioned inter-electrode insert from the molecular emission spectrum of nitrogen

AA Mikhalchenko, EV Kartaev, VI Kuzmin… - Thermophysics and …, 2011 - Springer
Results of application of a method for measuring the distribution of temperature in a nitrogen
plasma jet emanating from a dc plasma torch with sectioned inter-electrode insert from the …

Two-mode interferometric waveguide sensors based on chalcogenide glasses

VI Nalivaiko, MA Ponomareva - Optics and Spectroscopy, 2017 - Springer
The operation principles of interferometric waveguide sensors have been considered. A
comparison of the sensitivity of the two-mode sensors with waveguides of oxide and …