bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of structure formation in thin films by means of optical pyrometry
Authors: Dolmatov A V , Milyukova I V , Gulyaev P Yu 
Published: August 2019

Abstract
The paper presents an approach to the identification of structural and phase changes in high-speed processes of spraying coatings and high-temperature synthesis of three-dimensional products from metal and ceramics. A method for evaluating the spectral degree of blackness of materials by means of optical pyrometry is described. An experimental complex was developed to study the degree of blackness of the surface of molybdenum, tantalum and tungsten foils in the process of stationary heating by electric current. The results of complex experimental studies are presented, showing that a jump in emissivity makes it possible to detect a change in the aggregate state of matter (liquid - solid), phase transitions, exo- and endothermic reactions in thin films, and also to determine characteristic temperatures with an error of 0.1–1.5%.
Receiving thin films of active component on surface of glass-fiber catalysts by method of reactive magnetron sputtering
Authors: Elyshev A V , Udovichenko S Yu , Bobylev A N , Matigorov A V , Zagoruiko A N 
Published: August 2019

Abstract
The technology for high-performance glass-fiber catalysts (GFC) on the basis of reactive magnetron sputtering to produce a thin film based on transition metal oxides with high adhesion to the support and film homogeneity in composition has been developed. Catalysts are appointed for environmentally friendly disposal of liquid hydrocarbon wastes and sludge with a reduction in gas emissions with possible further processing.
Plasma-induced formation of hydrogen resistant oxide layers on zirconium surface
Authors: Evsin A E , Begrambekov L B , Kaplevsky A S , Kudashev I S , Gumarov A I , Kashapov N F , Luchkin A G , Vakhitov I R , Yanilkin I V , Tagirov L R 
Published: August 2019

Abstract
Features of plasma-induced formation of the surface oxide layers on zirconium alloy E110 (Zr–1%Nb) as well as hydrogen resistant properties of these layers are studied. It is shown that irradiation of the E110 sample with 1 keV ions of He + O2 plasma produces the oxide layer depleted by oxygen nearby the surface. The onset of the intensive hydrogen penetration into the ion-irradiated sample during the steam test (673 K, 0.1 MPa) appears to occur 1500 hours later than into the untreated one.
Producing and investigation of radiation-absorbent coatings based on conductive polymers
Authors: Gareev K G , Khmelnitskiy I K , Aivazyan V M , Golubkov V A , Ivanitsa M G , Kunitsyn A S , Lagosh A V , Mikhailova O N , Reinyuk A V , Testov D O , Testov I O , Testov O A 
Published: August 2019

Abstract
PANI and PEDOT:PSS films were produced on a dielectric substrate and characterized by optical and electron microscopy. The absorption coefficient of electromagnetic radiation in films is measured using a coplanar transmission line. The possibility of using conductive polymers (PANI and PEDOT:PSS) as the basis for conformal radiation-absorbent materials designed to protect bio- and technosphere objects is shown.
Peculiarities of deposition of thick coatings based on binary Co-W alloy
Authors: Gololobov G P , Suvorov D V , Tolstoguzov A B , Tarabrin D Yu , Slivkin E V , Serpova M A , Avramenko S A 
Published: August 2019

AbstractThe present paper has represented the results of the research of electrochemical deposition of coatings based on Co-W alloy from the citrate electrolyte. Possibility to obtain large (more than 40 μm) thicknesses without cracking has been demonstrated. Peculiarities of the surface relief structure change after increase of the coating thickness have been researched. Possibility to control a concentration of tungsten in the coating alloy within the range 14 at.% – 21 at.% has been shown. Dependence of the coating microhardness on the thickness has been represented.
The efficiency of diamond-like coatings for increased wear resistance of end mills at the machining aluminum alloys
Authors: Grigoriev S N , Volosova M A , Fedorov S V , Shein A A , Zykova M A , Kapustina N 
Published: August 2019

Abstract
The efficiency of diamond-like carbon (DLC) coatings deposited by CVD- and PVD-technologies to increase the wear resistance of tungsten carbide end mills for aluminum alloy processing was experimentally studied. A complex of metallophysics studies was carried out including SEM analysis of coating surface, microrelief, a ratio between sp3- and sp2-bonds, and the microhardness of coatings obtained by nanoindentation. The final stage of the research addresses the operational testing of end mills during processing of high-strength aluminum alloy AlZn5.5MgCu.
Prediction of the functional characteristics of plasma titanium aluminide coatings by computer simulation
Authors: Jordan V I , Blednov V A 
Published: August 2019

Abstract
The results of stochastic simulation (computer-aided design) of a layered structure formation and functional characteristics (porosity, roughness, adhesion) of metal coatings based on titanium aluminide powders (γ-phase TiAl) under conditions typical of atmospheric plasma spraying are given. Taking into account the stable formation of a metal splats and titanium aluminide coatings, as well as minimum porosity and maximum adhesive strength of coatings, the optimal plasma spraying mode has been obtained: the particle velocity U

p
= 250 m/s, the particle temperature T

p
≤ 2050 K, the particle diameter D

p
= (30 ± 10) μm.
Reproducibility of a heterophase structure emergence effect when changing the ignition temperature of SHS in a layered nanosized nonstoichiometric Ti-Al system
Authors: Jordan V I , Shmakov I A 
Published: August 2019

Abstract
The simulation results of SHS process in a package of alternating nanoscale layers of the crystal lattices of Ti and Al atoms for two systems with various numbers of atoms and nonstoichiometric ratios are given. For simulation the LAMMPS package supporting parallel computations and the interatomic interaction potential in the “embedded atom” model (EAM) have been used. For two systems with various numbers of atoms and nonstoichiometric ratios the sets of temperature and density profiles along the layers of the structure at successive instants of time (up to 16 ns) have been obtained. For a system with 453974 atoms and a nonstoichiometric ratio of 1.23 the heterostructure emergence with an alternation of intermetallic phases when changing the SHS “ignition” temperature has been reproduced.
Producing and investigation of PEDOT films as electrodes of ionic electroactive actuators
Authors: Khmelnitskiy I K , Aivazyan V M , Alekseev N I , Broyko A P , Golubkov V A , Testov D O , Lagosh A V , Kalyonov V E 
Published: August 2019

Abstract
Experimental samples of ionic electroactive actuators with poly(3,4-ethylenedioxythiophene) electrodes (PEDOT) have been developed and produced. Measurements of amplitudes of a displacement, frequency and power characteristics of produced actuators were carried out. The influence of the membrane solvent, as well as the influence of the EDOT polymerization time on the sample structure and the output characteristics of actuators, was determined.
The optical constants of the films MgBaF4 in the range of 1.3–16 micron
Authors: Kotlikov E N , Novikova Yu A 
Published: August 2019

Abstract
A BaF2 films, characterized by low refraction coefficient in the infrared region of the spectrum, are widely used in the production technology of optical structures. Their serious drawback is the low mechanical strength and moisture resistance. This paper presents the results of an experimental study of the optical properties of a new type of MgBaF4 films made from a vacuum-sintered mixture of MgF2 and BaF2 to a homogeneous composition.
Properties of the protective powder coating made on the basis of nickel and received by the cold spray method
Authors: Krivina L A , Tsareva I N , Tarasenko Yu P , Berdnik O B 
Published: August 2019

Abstract
The structure, porosity, microhardness, adhesion strength of gasdynamic powder coatings have been investigated. Patterns of the process of electrochemical breakdown and passivation of coatings have been studied during comparative tests in the seawater in accordance with time factors. It is established that the protective coating on the basis of nickel with increased thickness in combination with low apparent porosity and high adhesion strength provides reliable electrochemical protection of the electric contacts made of titanic VT3-1 alloy in the sea water.
Interaction of the metal plasma flows with surfaces of complex geometric shapes
Authors: Kuznetsov V G , Kostrin D K 
Published: August 2019

Abstract
The features of coating formation using vacuum-arc discharge plasma on the inner surface of a cylindrical cavity with transverse ribs in the form of a diaphragm are considered. The mathematical model is developed and expressions for calculation of thickness of coatings are received. The effect of the diaphragm on the thickness distribution and uniformity of the coating is shown. Compression areas directly in front of the barrier affecting the coating deposition rate were found.
Thermal regime of the cathode in a vacuum-arc discharge during coating deposition
Authors: Kuznetsov V G , Kostrin D K , Valuev V P 
Published: August 2019

Abstract
The questions of stabilizing the cathode temperature in a vacuum-arc discharge are discussed. A model and a method for calculating the temperature of the working surface of the cathode end, eroded under the action of cathode spots, are presented. Stabilization of the cathode temperature is carried out by changing the arc discharge current during the operation of the evaporator in accordance with the obtained regularity or design solutions.
The research of the features destruction of the of oxide coatings on aluminum alloy by using the method of acoustic emission
Authors: Li X , Bashkov O V , Bao F , Kim V A , Zhou C , Shakirova O G 
Published: August 2019

Abstract
The influence of oxidizing the aluminum product 6070 with different times of micron exposure on the registration of acoustic emission signals (AE) during mechanical testing of samples was investigated. The results of microstructural studies after mechanical tests confirm the mechanism for generating AE signals associated with the destruction of coatings and the effects of plastic deformation on microarc oxidation, the newly formed surfaces of the substrates.
Improve wear resistance of composite coatings on cutting tool from high-speed steel
Authors: Migranov M Sh , Shekhtman S R , Migranov A M 
Published: August 2019

Abstract
Some ways of improving the tribotechnical characteristics of wear-resistant coatings from high-speed steel on cutting tools after ionic surface modification are considered. The above studies show that the formed coating significantly increases (by 2.1–2.4 times) the wear resistance of the cutting tool due to the expansion of the stage of normal wear.
The currentless synthesis of tantalum and niobium carbide coatings on the carbon fibers and their electrocatalytic activity for the hydrogen peroxide decomposition reaction
Authors: Miklashov D G , Dolmatov V S , Kuznetsov S A 
Published: August 2019

Abstract
Coatings of tantalum and niobium carbides on the carbon fibers Carbopon-B-22 were obtained by the currentless transfer in the molten salts. The kinetics of the electrocatalytic reaction of the hydrogen peroxide decomposition on the surface of TaC/C and NbC/C composite materials was studied. The order of reactions was established, the rate constants were determined, and the activation energies of the hydrogen peroxide decomposition were calculated. It was established that the electrocatalytic activity of the NbC/C composition is higher than TaC/C.
Estimation of the cohesive strength of coatings made of powder materials
Authors: Moskvitin G V , Pugachev M S , Polyakov A N , Naumov O V 
Published: August 2019

Abstract
Methods for determining the mechanical properties of gas-dynamic coatings in shear (cut) and tensile tests are proposed to estimate the adhesive and/or cohesive strength of coatings more than 50 MPa. The results of studies on the strength of gas-dynamic coatings of copper, aluminum, zinc and nickel are presented. Dependences of mechanical properties of gas-dynamic coatings on the main technological modes of application are determined.
Effect of the plasma-forming gas consumption on processes of plasma spray coating and metal powder production
Authors: Okulov R A , Sarsadskikh K I , Ilinykh S A , Zakharov M N 
Published: August 2019

Abstract
The influence of the plasma-forming gas consumption on the plasma flow velocity and its turbulence intensity is analyzed. Full-scale experiment conducted to confirm the results of the mathematical experiment. Comparative analysis of the results of practical and theoretical experiments showed satisfactory convergence. As a result of the study, developers and consumers of equipment are offered recommendations for improving the technology.
Structural features and nitrogen positions in titanium oxynitride films grown in plasma of magnetron discharge
Authors: Pichugin V F , Pustovalova A A , Evdokimov K E , Konishchev M E , Kuzmin O S , Boytsova E L , Beshchasna Nataliia , Ficai Anton , Aubakirova D M , Sun Zhilei 
Published: August 2019

Abstract
The paper addresses the results of the analysis of the structural features of nitrogen-containing titanium oxides films, deposited by reactive magnetron sputtering. The films have a nanocrystalline two-phase structure and consist of anatase and rutile crystallites, regardless of the coating deposition regimes. No traces of titanium nitride phase are found in the film and nitrogen atoms in oxide form are localized at the grain boundaries of the deposited film.
Structure and properties of thin PZT films with inhomogeneous composition distribution
Authors: Pronin V P , Dolgintsev D M , Volpyas V A , Staritsyn M V , Kaptelov E Yu , Senkevich S V , Pronin I P 
Published: August 2019

Abstract
The paper presents the results of studies of bilayer thin ferroelectric PZT films with a lead content variation on the films thickness, formed by the method of radio-frequency magnetron deposition at different pressures of the gas mixture. It was shown that, depending on the sequence of deposition of the layers, both the structure and the dielectric parameters of the samples change.
Investigation of copper-doped aluminum composites with ceramic-like oxide coatings corrosion resistance
Authors: Savushkina S V , Agureev L E , Panasova G V , Apelfeld A V , Gerasimov M V , Sherbakov A I , Bogdashkina N L , Ignatenko V E 
Published: August 2019

Abstract
The effect of MAO coatings on the electrochemical behavior of aluminum composites without additives and doped with copper (1, 2, 3 wt%) in 3% NaCl solution compared to uncoated aluminum composites has been studied. A comparison of the polarization dependences of the current density lgi on the potential E of coated and uncoated aluminum composites showed the positive effect of MAO coatings on the electrochemical properties. It is shown that the presence of copper affects the electrochemical characteristics of composites with MAO coatings as compared to composites without additives. The values of current densities on the anode curves of MAO-coated aluminum composites with 1, 2, and 3% copper are not significantly different. On the local areas of the coatings the oxide-chloride compound islands were found after electrochemical tests.
Formation and properties of micro-arc silicate biocoatings on bioresorbable alloy Mg0.8Ca
Authors: Sedelnikova M B , Ugodchikova A V , Komarova E G , Tolkacheva T V , Sharkeev Yu P 
Published: August 2019

Abstract
The purpose of this study was to form the silicate biocoatings on Mg0.8Ca alloy by the micro-arc oxidation method and to study their structure, elemental and phase composition. With increase in the applied voltage from 350 to 500 V the biocoating thickness grew from 40 to 150 μm. Elongated crystals, which typical for wollastonite, were observed on the coating surface. EDX analysis revealed that the calcium and silicon are localized in the areas with elongated crystals. The wollastonite and akermanite crystalline phases were found in the coatings by XRD studies. Akermanite was formed because of wollastonite interaction with a magnesium substrate during the MAO process. When an applied voltage increased, an amount of akermanite reduced.
Reactive magnetron sputtering of hot titanium target in mixture of argon and nitrogen
Authors: Shapovalov V I , Minzhulina E A , Shestakov D S , Kochin A V 
Published: August 2019

Abstract
The influence of nitrogen flow rate on the discharge I-V characteristics of a dc magnetron with a single hot titanium target is studied. The basic processes forming the discharge are determined. The discharge physical models are proposed.
An affordable way to get silver nanoparticles for conductive inks and pastes
Authors: Sleptsov V V , Savkin A V , Kukuskin D Yu , Diteleva A O , Fursik A Yu 
Published: August 2019

Abstract
In this paper, we study the process of obtaining silver nanoparticles by the method of electrospark erosion of silver electrodes in distilled water with a significant overvoltage of the electrode gap. Studies were conducted on the previously developed experimental setup. The results showed that when the air discharge gap FV1 is much larger than the working discharge gap FV2, their exact ratios do not affect the particle size of the nanopowder. The particle size of the nanopowder is determined by other, not yet established process factors. Manufactured nanopowders have the same average size for all production modes and are characterized by a small scatter of particle sizes. The development of the process of obtaining silver nanoparticles by the method of electrospark erosion will reduce the cost of conductive inks and pastes in the future.
Technology of preparation of the LiCoO2 reactive mass for chemical current sources
Authors: Sleptsov V V , Govorov V A , Korobeynikov E V , Kovalev I A , Melnikov A B 
Published: August 2019

Abstract
The article discusses methods for the preparation of chemically reactive mass LiCoO2 in the form of dispersion for use in chemical current sources. The dispersion technique and the method of deposition of LiCoO2 particles from the obtained dispersion on the electrode material are described. The results of SEM on the penetration of LiCoO2 into the material and the results of mass changes are presented.
The functional relationship of tribological and anti-icing properties of multifunctional ultrathin fluoropolymer coatings
Authors: Vokhidov A S 
Published: August 2019

Abstract
The paper discusses the relationship between the physicochemical properties of film-forming polymer fluorine compounds, which form the so-called Langmuir-Blodgett structures on a treated surface in the form of ultrathin coatings and nanosize films, giving the treated surface tribological, anti-icing, and hydrophobic properties.
Etching by a beam of fast argon atoms of gas dynamic grooves on the surface of ceramic substrates
Authors: Volosova M , Melnik Yu , Metel A 
Published: August 2019

Abstract
A method of manufacturing the grooves of the end seals from high-strength dielectric materials is proposed. Uneven depth (no more than 10%) imposes a limit on the processing time. Grooves with a depth of ∼5 μm in corundum substrates can be made using a source of fast argon atoms in ∼1 hour with their energy of 3 keV and equivalent beam current of 1 A.
Research of adhesion of a covering on cylindrical surfaces
Authors: Yakupov N M , Yakupov S N , Gubaydullin R I 
Published: August 2019

Abstract
The approaches have been assessment of adhesion of a thin layer covering the surface of a cylindrical cover have been developed. An example of determination of adhesion from internal pressure and also an example of a research of adhesion have been considered at a cover bend. The method is a reliable tool for adhesive definition.
Affinity-dependent bound on the spectrum of stochastic matrices
Authors: Uhl Matthias , Seifert Udo 
Published: August 2019

Abstract
Affinity has proven to be a useful tool for quantifying the non-equilibrium character of time continuous Markov processes since it serves as a measure for the breaking of time reversal symmetry. It has recently been conjectured that the number of coherent oscillations, which is given by the ratio of imaginary and real part of the first non-trivial eigenvalue of the corresponding master matrix, is constrained by the maximum cycle affinity present in the network. In this paper, we conjecture a bound on the whole spectrum of these master matrices that constrains all eigenvalues in a fashion similar to the well known Perron–Frobenius theorem that is valid for any stochastic matrix. As in other studies that are based on affinity-dependent bounds, the limiting process that saturates the bound is given by the asymmetric random walk. For unicyclic networks, we prove that it is not possible to violate the bound by small perturbation of the asymmetric random walk and provide numerical evidence for its validity in randomly generated networks. The results are extended to multicyclic networks, backed up by numerical evidence provided by networks with randomly constructed topology and transition rates.
Analysis Of Flood Hazard Zones Using Overlay Method With Figused-Based Scoring Based On Geographic Information Systems: Case Study In Parepare City South Sulawesi Province
Authors: Adlyansah A L , Husain L R , Pachri H 
Published: August 2019

Abstract
Flooding is one of the serious problems that befell Parepare City, South Sulawesi Province. This problem has a negative impact on the surrounding community. Proper planning needs to be pursued so that losses from the disaster can be reduced. This study uses an overlay method with scoring between existing parameters, where each parameter is carried out a scoring process by giving the weight and value according to each classification which is then overlaid using ArcGIS 10.3 software. The use of this software utilizes a Geographic Information System (GIS) that can explain and present objects of flood hazard areas in digital form. The parameters which is used in this study are based on Kazakis et al. (2015), namely FIGUSED (Flow Accumulation, Rainfall Intensity, Land Use, Slope, Elevation, Distance to Drainage Network). The results obtained in the form of flood-prone maps where very vulnerable locations have an area of 10.72 Km2 or about 13.04% of the total area of the City of Parepare and the flood index value (FHI) 4.20 - 6.87 including high-hazard zones, have wide 48.04 Km2 or about 58.41% of the total area of Parepare City and the flood index value (FHI) 3.58 - 4.20 including the low hazard zone, and which has an area of 23.49 Km2 or about 28.55% of the total the area of Parepare City and the flood index value (FHI) 2.20 - 3.58 are included in the safe zone. Meanwhile, the causes of flooding in Parepare City are flow accumulation, slope, distance from the river, and landuse.