Explanipedia

Plasma Coatings for Protection Against Hydroabrasive and Cavitation Wear Open

Victor Kuzmin, I. P. Gulyaev, Dmitriy Sergachev, Alexander Tambovcev, Boris Palagushkin , et al. · 2023

The results of research work on the application of coatings designed to protect the working surfaces of machine parts and mechanisms operating under conditions of hydroabrasive and cavitation wear are presented. Coatings were produced by s…

Microstructure and properties of Ni-Al coatings obtained by conventional and high-velocity atmospheric plasma spraying Open

Elena Kornienko, I. P. Gulyaev, А. И. Смирнов, А. А. Никулина, Alexey A. Ruktuev , et al. · 2022

Application of functional coatings by supersonic thermal plasma flows Open

V. I. Kuzmin, I. P. Gulyaev, D. V. Sergachev, Boris Palagushkin, O Y Lebedev · 2021

Development of modern high-speed technologies for thermal spraying proves that deposition of high-quality dense coatings requires velocity of sprayed particles to be 600 m/s and above. Plasma spraying is the most versatile and highly produ…

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

V. I. Kuzmin, I. P. Gulyaev, D. V. Sergachev, Boris Palagushkin, O Y Lebedev , et al. · 2021

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 torch. Such a local input of the sprayed material significan…

Mechanism of structural formation in the combustion wave of the Ni-Al system with strengthening additives Open

Hong Zhi Cui, Angelica A. Grigoryevskaya, I. P. Gulyaev · 2020

In the work, microstructures formed in the combustion wave of the Ni-Al system with hardening additives of high-temperature ceramic particles consisting of titanium diboride and corundum were studied. Microstructures and shapes vary depend…

CFD-analysis of the interaction of particles with a surface in the conditions of suspension plasma spraying Open

A. S. Tambovtsev, Vitaliy V. Belyaev, I. P. Gulyaev · 2020

Gas-thermal coating using suspensions and solutions of precursors allows to obtain promising functional coatings based on oxide ceramics with a controlled microstructure. CFD modeling of air plasma flows generated by the PNK-50 plasmatron …

Computer-aided simulation of WC-10Co-4Cr cermet coatings formation and predictive detection of optimal spraying regimes Open

Vladimir Jordan, I. P. Gulyaev, V. I. Kuzmin, V A Blednov · 2020

The results of computational experiments on the formation of thermal spray WC-10Co4Cr coatings are presented. The effect of sprayed particles velocity (200-1000 m/s), temperature (1600-2500 K) and the size (15-40 microns), as well as subst…

Analysis of interphase heat and mass transfer in suspension plasma spraying using air Open

I. P. Gulyaev · 2019

A theoretical model of interphase interaction “suspension particle - plasma flow” is proposed. The model assumes several successive stages of the evolution of liquid material: 0) entry into the plasma stream and break-up of the liquid into…

Advanced functional coatings deposited using supersonic atmospheric plasma spraying Open

I. P. Gulyaev, V. I. Kuzmin, Elena Kornienko · 2019

This paper presents the latest results of the ITAM team’s work in the development of the supersonic version of a spraying DC plasma torch «PNK-50» and demonstrates possibilities of Supersonic-APS method. Increasing the speed of the plasma …

VISUALIZATION OF THE gas-dynamic STRUCTURE OF PLASMA FLOWS OF A PNK-50 plasma torchusing THE SHADOW METHOD Open

I. P. Gulyaev, V. I. Kuzmin, Maxim Golubev, Pavel Tyryshkin, A. Dolmatov · 2018

The paper presents the study of the gas-dynamic structure of air plasma flows produced by the PNK-50 spray torch using the shadow (schlieren) method. The operation of the plasma torch was studied in three different configurations, differin…

Numerical and experimental investigation of two phase flow for direct metal deposition Open

T. A. Polyanskiy, А. В. Зайцев, I. P. Gulyaev, A. M. Gurin · 2018

In this work, one of the main scientific and technological problem of laser cladding technology, increasing the powder usage coefficient are studied. Two-phase gas-powder flow are investigated. Physical and mathematical models of powder tr…

Diagnostic system «Yuna» for disperse phase properties control in plasma and laser powder deposition processes Open

I. P. Gulyaev, A. Dolmatov · 2018

The possibilities of using the optical diagnostic complex «Yuna» for studying the characteristics of a disperse phase gas-powder jets under conditions of thermal spraying, laser cladding, as well as modeling physical experiments with cold …

Optical study of supersonic jet structure in atmospheric plasma spraying Open

I. P. Gulyaev, Maxim Golubev, V. I. Kuzmin, Pavel Tyryshkin · 2018

The paper presents the results of optical studies of supersonic plasma flows of the DC plasma torch PNK-50 using shadow (schlieren) diagnostics, traditional video-registration using narrow-band light filters and spectrometry. The operation…

Numerical and experimental study of dispersed flow in laser cladding Open

А. В. Зайцев, I. P. Gulyaev, T. A. Polyanskiy, A. M. Gurin · 2018

In this work, physical and mathematical models of powder transportation by gas during laser cladding are discussed. The main attention is paid to modeling the interaction of powder particles and nozzle walls. The results of numerical simul…

Structural features of the coatings of the Ni-Al system obtained by air-plasma spraying Open

Elena Kornienko, О. А. Рубцова, I. P. Gulyaev, V. I. Kuzmin · 2017

This article deals with the structural features of nickel aluminides coatings obtained by air-plasma spraying with the unit of annular injection of powder. The subsonic (plasma velocity is 1200 m/s) and supersonic (plasma velocity is 1900 …

Structure Features of B4C-Ni-P Plasma Coatings Open

Elena Kornienko, V. I. Kuzmin, Vasily Loghkin, I. P. Gulyaev, Alexander Sivkov , et al. · 2017

А Н Н О ТА Ц И Я

Trace-transform invariants of tracks of high-velocity jets from the surface of tungsten droplets in the plasma flow Open

Pavel Gulyaev, Vladimir Jordan, I. P. Gulyaev, A. Dolmatov · 2017

The paper presents the analysis of the recorded tracks of high-velocity emission in the air-argon plasma flow during breaking up of tungsten microdroplets. This new physical effect of optical emission involves two stages. The first one inc…

Equipment and technologies of air-plasma spraying of functional coatings Open

V. I. Kuzmin, I. P. Gulyaev, D. V. Sergachev, S. P. Vaschenko, Elena Kornienko , et al. · 2017

\nThis article presents a short description of the DC plasma torch "PNK-50" structural features (ITAM SB RAS, Novosibirsk) used for spraying of functional coatings with powder materials as well as gives the results of thermophysical and te…

Anomalous high-velocity outbursts ejected from the surface of tungsten microdroplets in a flow of argon-air plasma Open

I. P. Gulyaev, A. Dolmatov, Pavel Gulyaev, V I Iordan, M. Yu. Kharlamov , et al. · 2016

For the first time, a phenomenon of high-velocity outbursts ejected from the surface of liquid tungsten microparticles in a flow of argon-air plasma under atmospheric pressure was observed. As tungsten particles sized 50 to 200 μm moved in…

Control of dispersed-phase temperature in plasma flows by the spectral-brightness pyrometry method Open

A. Dolmatov, I. P. Gulyaev, Pavel Gulyaev, V I Iordan · 2016

In the present work, we propose a new method for measuring the distribution of temperature in the ensembles of condensed-phase particles in plasma spray flows. Interrelation between the spectral temperature of the particles and the distrib…

Temperature measurements in combustion of counter jets in burner devices Open

Alexander N Bazhaykin, V. K. Baev, I. P. Gulyaev · 2015

The investigation of propane-butane counter jets combustion in burners with permeable walls was carried out. The effect of addition of silicon oxide, zircon and carbon powder on combustion regime and temperature of free counter jets was in…

Plasma spraying of wear-resistant coatings from powdered self-fluxing alloys Open

Victor Kuzmin, Sergei P Vaschenko, I. P. Gulyaev, Eugene V Kartaev, Dmitriy Sergachev , et al. · 2015

The thermo-physical and technological investigations of effectiveness of high-temperature heterogeneous flow formation and spraying of coatings from self-fluxing Ni-based powders using of unit of annular injection of powders with gas-dynam…

Experimental investigation of process of plasma-arc wire spraying Open

I. P. Gulyaev, Pavel Gulyaev, V.N. Korzhik, A. Dolmatov, V I Iordan , et al. · 2015

Application of current diagnostic systems becomes very important in development of fundamental concepts in area of thermal spraying and obtaining of new experimental data, in particular, on plasma-arc wire spraying.Firmware complex based o…

The optical control system of dispersed phase properties in thermal spray process Open

A. Dolmatov, I. P. Gulyaev, Vladimir Jordan · 2015

The models of measuring the velocity and temperature of particles using the processing of their track images are introduced. The method of brightness pyrometry of moving objects uses the calibration procedure based on the static temperatur…

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