P. A. Tsygankov

P. A. Tsygankov
Industrial University of Santander | UIS · School of Physics

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49
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446
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Publications

Publications (49)
Article
The paper presents some results of experimental studies of Mo/Si multilayer degradation under UV exposure from compressed plasma jets in air. Such high current plasma flows generate broadband powerful UV radiation fluxes. A single exposure caused a slight decrease of reflectivity from 0.54 to 0.47 due to the coating contamination by the debris from...
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Carbon-carbon composites with calcium phosphate (Ca-P) coatings (with a thickness up to of ≈100 μm) are considering as prospective grafts for defect bone substitution. Detonation spraying of Ca-P layers allows to fulfil a deposition mode with relative low temperature loads (up to a temperature of the processed surface of ≈850…1100 K) under a pulsed...
Article
The selective modification of upper layers of a Ni/Al multilayer nanostructure irradiated by a single femtosecond laser pulse has been studied. The analysis of surface topography indicates that either partial or complete removal of two upper layers is possible depending on the absorbed energy. The surface has been scanned by an atomic force microsc...
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Multilayer products made of ultra-thin layers are widely used in modern science and technology. Laser exposure is used as one of the promising methods of processing such products. In this regard, we study the ablation of a layered target. A physical model is constructed, numerical simulation is performed, and experiments are carried out. The experi...
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The surface modification of silicon sheets with titanium and titanium+nitrogen is presented by means of a hybrid high voltage pulsed discharge and electric arc in a vacuum. The spectral diagnostic shows an approximate value of the temperature of the titanium cathode in the hybrid discharges of 7127 ± 200 K and in the arc discharges of 8888 ± 767 K....
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The paper presents experimental study of IR absorbance of the thin TiO film (with the thickness of 600 nm) on the glass substrate. The titanium monoxide (TiO) film was prepared with the ion-beam scattering. The film was characterized by XRD, FTIR, SEM etc. IR absorption spectra for the film and the substrate were measured. It was shown that the ave...
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The glow discharge is the basis of conventional techniques used to improve the tribological properties of materials, such as the generation of thin films using ionic beams and the sputtering process for the treatment of surfaces. This work focuses on the numerical study of the glow discharge in a system composed of a cylindrical quartz chamber cont...
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Titanium and its alloys are currently the main materials for prosthetics, despite the fact that they, like other metals, have significant drawbacks: they cause metallosis, can provoke the formation of fibrous tissues and bone resorption in the contact zone, are toxic and, in some cases, allergenically dangerous. The noveday trend in implant technol...
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The magnetron sputtering of cathode material is one of the ways of producing a thin film deposition on solid surfaces and maintaining the cathode system under a certain potential. Recently, some experimental study of a magnetron sputtering system with the segmented cathode at different electric potential on each segment has been conducted. It allow...
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In the industry of hard coatings, the vacuum arc evaporator is one of the commonly used devices due to its high productivity, reliability and ability to operate in a non-gaseous medium. Apart from this, the imposition of an external magnetic field allows to control the localization of the arc spots both on the simple and sectioned (i.e. made from d...
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The frictional coefficients at the front and rear surfaces of a VK6 hard-alloy cutter with experimental nano- and microcrystalline CVD diamond coatings applied in microwave plasma are determined by extrapolation to zero cut-layer thickness. It is found that, for diamond coatings with a single microcrystalline layer and those with both a microcrysta...
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The surface modifications in a multilayer thin-film structure (50-nm alternating layers of Si and Al) induced by a single Gaussian-shaped femtosecond laser pulse (350 fs, 1028 nm) in the air are investigated by means of atomic-force microscopy (AFM), scanning electron microscopy (SEM), and optical microscopy (OM). Depending on the laser fluence, va...
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Experimental studies of carbides are briefly reviewed. The high-temperature properties of carbides used in nuclear power and aerospace engineering are considered. Temperature is measured from either plane surface emittance or the emittance of thin samples prepared in the form of a melting blackbody model. The following quantities are measured: Joul...
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The interaction between shock waves (velocity D0 ≈ 2–2.5 km s⁻¹ and maximum pressure pmax ≈ 3.1–3.8 MPa) containing finely dispersed hydroxyapatite particles (with mean diameters of dp ≈ 70 nm and 100 μm) and substrates of carbon nanostructured composites that are a periodic three-dimensional scaffold is investigated experimentally. Study of these...
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Objective: In this present research work the behaviour of temperature of the substrate manufactured in AISI H13 steel, in the range of and , during of surface deposition of titanium nitride (TiN) thin films by the technique of cathodic arc in vacuum. Results: The physical properties of the TiN films were obtained and analysed by the techniques of m...
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The paper is devoted to the experimental study of the generation of the weakly ionized high velocity heterophasic flows by gas detonation in acetylene-oxygen mixtures. Such flow can contain fine hydroxyapapite (HOA) particles with an average diameter of dp≤100 μm for spraying of biocompatible coatings. The characteristic velocity (≈2.3...2.5 km/s)...
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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 substrates with high aspect ratios. Dynamic study of cutting forces and sliding friction has shown a significant improvement in the tribological prope...
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The paper presents the experimental study of the using of gas detonation for spraying of hydroxyapapite (HOA) particles onto the carbon nanocomposites. The characteristic parameters of the heterophasic detonation flows were defined. The prepared films (with a thickness of 80…100 μm) were polycrystalline with Ca and P concentration ratio of ≈1.67 as...
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The work is devoted to the synthesis of colloidal quantum dots (QDs) and their bioconjugates with proteins. Various QDs were obtained as well with synthesis method in an organic solvent followed by hydrophilization and functionalization or synthesis in aqueous phase provides obtaining hydrophilic QDs directly. Particular attention is paid to the sy...
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Modern trends in development of aircraft engineering go with development of vehicles of the fifth generation. The features of aircrafts of the fifth generation are motivation to use new high-performance systems of onboard power supply. The operating temperature of the outer walls of engines is of 800–1000 K. This corresponds to radiation heat flux...
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The experimental set for artificially modulated structures production through an advanced vacuum arc evaporator with a magnetically-driven cathode spots on the cathode surface is described. The main features of vacuum arc as a vapor source with time-modulated compositions are discussed. The characteristics of the obtained multilayer coatings with a...
Article
Ferrites with composition of NiMnxFe1-xO4, (with x = 0 ÷ 1.0) have been synthesized by self-propagating high-temperature synthesis (SHS). The particle size of the synthesized ferrite powder was about 10 nm. Additional heat treatment at 1270 K during 50 min allowed us to obtained product with the single phase composition NiFe2O4. We found out that t...
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Of the plasma methods used to improve the tribological properties of the solid surface [1-3], the treatment of metal pieces in the hybrid discharge, which is a combination of high voltage and electric arc discharges, seems very promising [4,5]. This method is developed in the Plasma Physics and Technology Laboratory at the Universidad Industrial de...
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La implantación iónica tridimensional (3DII) [1] es una técnica de tratamiento superficial avanzado [2], la cual es realizada en el dispositivo JUPITER (Joint Universal Plasma and Ion Technologies Experimental Reactor) [3] mediante una descarga pulsada de alto voltaje a bajas presiones en un gas encendida en la rama izquierda de la curva de Paschen...
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Para realizar el estudio de los haces electrónicos en la descarga eléctrica de alto voltaje a bajas presiones se implementó el dispositivo JUPITER (Joint Uniersal Plasma and Ion Tecnologies Experimental Reactor) que está fundamentado en las ideas de implantación iónica tridimensional (3DII) y un sistema de reglas especiales de acrilico que determin...
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Recibido 30.03.10; Aceptado 20.06.11; Publicado en línea 04.09.11. Resumen Se estudia un vaporizador de arco con el cátodo de titanio que es destinado para desarrollar una tecnología de películas protectoras de metales. Se muestra que a pesar de que el vaporizador se alimenta por un voltaje constante la descarga de arco se enciende en un régimen de...
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RESUMEN En muestras de acero H13 fueron depositadas películas de Nitruro de Titanio TiN por el método de deposición física de vapor PVD, se utilizo un microscopio de fuerza atómica AFM con el fin de caracterizar las propiedades morfológicas como tamaño de grano y rugosidad, mediante un análisis de las imágenes obtenidas se encontraron valores de ru...
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Ti / TiN films were deposited on H13 steel and silicon substrates with different deposition voltage, by means of the cathodic arc evaporation (CAE) technique, this process was carried out by nanolayers deposition, requiring a detailed survey on growth films, for the properties characterization such as grain size, thickness and roughness of the film...
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The state of problems for preparing and using multilayer nanostructured heat-generating films and coatings is considered. A method is proposed for preparing binary Ti/Al coatings. The composition, structure, adhesion and tribological properties of coatings on substrates of various materials are studied. It is shown that the hardness of a Ti/Al coat...
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For the first time, the kinetics of heterogeneous reactions in nanofoils was studied by electrothermographic method. During combustion, the electrical resistance of reactive multilayer Ti/Al nanofoils strongly changes, which was used to determine an evolution of the extent conversion during reaction.
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Time-resolved synchrotron radiation diffraction analysis was applied for detecting structure and phase transformations during heterogeneous reactions in lamellar intermetallic composites obtained by mechanical activation and magnetron deposition. Results show that reactions in these systems start at lower temperature, as compared to common powder m...
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Phase's transformations during solid state reaction in the mechanically activated (MA) Ni/Al powders and thin films were investigated by time-resolved diffraction (TRXRD). MA samples with different initial composition and activation time were studied. It was found, that the first detected phase was NiAl3 eventhough initial compositions showed NiAl-...
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Structural transformations in multilayer Ti-Al films (layer thickness from 4 to 500 nm, number of layers up to 4440, total foil thickness ∼18 m) upon slow heating have been studied by time-resolved synchrotron radiation diffraction. Some specific features of heterogeneous reactions and the sequence of phase formation in multilayer samples during th...
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Structural transformations in multilayer bimetallic foils (the layer thickness from 5 to 500 nm, the number of layers up to 5500) under conditions of slow heating and in a gasless combustion wave were investigated by the example of the Ti-Al system using dynamic X-ray diffraction analysis (including analysis with the use of synchrotron radiation)....
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The process of structural transformations due to rapid heterogeneous reaction is studied by time-resolved synchrotron radiation diffraction analysis. This method allowed to reveal main stages of product formation in the multilayer Ti/Al nano-films as well as the powder micro-heterogeneous mixtures Ti–Al–B and Ti–Al–C. Peculiar problems of adaptatio...
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This article describes results obtained during the study of the combustion syntheses of intermetallic Al–Ti films, starting from elemental nanoscaled multilayers of Al and Ti. The original multilayers were prepared by plasma sputtering and the combustion synthesis was started by local or general heating, depending on the case. Atomic scanning tunne...
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Ti–Al multilayer foils were produced magnetron vacuum deposition. The microstructure period varied in the range of 5–110 nm, the number of layers was 150–4700, and the total thickness of a multilayer foil reached 15–20 m. The gasless combustion of the foils was studied. Steadystate and pulsating combustion regimes were revealed; combustion temperat...
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The multilayer thin films Ti/Al were obtained using the method of magnetron vacuum deposition. The microstructure period was varied in the range 5-110 nm, the layers number was equal to 150-4700 and the total multilayer film thickness was in the range 15-20 μm. Gasless combustion of obtained films was studied. The stationary and pulsating combustio...
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It is well known that the production of semiconductors and chips with required parameters and properties is based on ion beam technology. However, the industrial use of ion beams still remains a problem because it requires a high rate and homogeneous treatment of the samples of complex configuration. Plasma technologies can make an efficient contri...
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A high-voltage pulse gas discharge burning on the left branch of the Paschen curve is used as a basis for three-dimensional ion implantation (3DII). The 3DII technique uses a scheme whereby the target is the cathode and the anode is a vacuum chamber filled with working gas in the pressure range 0.15–2.0 Pa. The external characteristics of the gas d...

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