bluuebunny/crossref_metadata_2025_split huggingface dataset:
Perfluorocarbon nanoemulsions containing fluorinated photosensitizer for photodynamic cancer therapy
Authors: Markova A A , Belyaeva E V , Radchenko A S , Dmitrieva M V , Sigan A L , Shtil‘ A A , Chkanikov N D 
Published: May 2020

Abstract
The composition of the photosensitizer and fluorocarbons with high oxygen capacity allows to increase the effectiveness of photodynamic therapy, which is shown on tumor cells. To achieve the solubility of photosensitizers in fluorocarbons, a number of fluorinated porphyrins were synthesized and their spectral characteristics were obtained. Fluorocarbon emulsions without a photosensitizer are inert for tumor cells of human colon adenocarcinoma. Fluorocarbon nanoemulsion with leader fluorinated porphyrin with fluoroaliphatic substituents accumulates in tumor cells and causes photoinduced necrosis due to peroxidation of membrane lipids. Perfluorocarbon nanoemulsions in combination with a dissolved fluorine phase photosensitizer are promising compositions for the photodynamic therapy of cancer.
Carbon-forming properties of oils influencing the service of engines and aircraft reducers
Authors: Melnikova I S , Kovba L V , Ratenko D V , Dvoyeglazov V S 
Published: May 2020

Abstract
During the operation of gas turbine engines (GTE), failures are encountered due to structural, production, and operational defects. According to the damage of the gas turbine engine, the percentage of malfunctions in the lubrication and venting system is 2.9% [1]. This paper discusses the most common problematic issues in the operation of oil systems (OS) associated with the formation of solid decomposition products of oils on the surfaces of gas turbine engine parts. Laboratory studies of the creation of high-temperature carbon deposits on a heated aluminum surface were carried out by spraying the test oil on it for a specific time on the tilt plate instrument. This instrument was used to study NYCO TURBONIKOIL 98 aviation oil for aviation gas turbine engines (GTD-350, TV2-117, TV3-117, VK-2500) and main gearboxes (VR-2, VR-8A, VR-14, VR- 252) aircraft (Mi-2, Mi-8T, Mi-8MTV/AMT, Ka-32). Quantitative dependencies of the formation of carbon deposits on the oil temperature and the temperature of the aluminum plate are obtained, and a color template of the intensity of formation of solid high-temperature carbon deposits depending on the oil temperature and the temperature of the aluminum plate is presented.
Study characteristics of failure multilayered steel materials in conditions at alternating symmetrical bending
Authors: Minakov A A , Plokhihk A I , Vlasova D V , Polikevich K B 
Published: May 2020

Abstract
The article presents a study of behaviour of multilayered steel materials in conditions of alternating symmetrical bending when heavy stress is applied at low-cycle fatigue conditions with the use of bending unbending test. The study showed different behaviour pattern when applying stress to two compositions of multilayered steel materials – W108+AISI 304 and W108+AISI 430. The fractographic analysis of fatigue rupture surfaces was used to explain the results obtained in studying the number of cycles prior to fracture, which showed that the mode of failure of the two compositions of multilayered steel materials was different.
The cobalt and nickel-containing polyethylene prepared by using metal-vapor synthesis
Authors: Pribytkov P V , Yu Vasil’kov A , Naumkin A V 
Published: May 2020

Abstract
Cobalt and nickel-containing low-pressure polyethylene samples (HDPE) were prepared by metal-vapor synthesis (MVS) of unstable bisarene complexes of Ni and Co type (C6H5CH3)2M and their further decomposition at a temperature of 178 K in the volume of HDPE. The Faraday method shows that Ni and Co nanometer particles are stabilized by the polyethylene matrix up to T=370 K. When the Ni-HDPE material is heated above 420 K, irreversible processes of interaction of Ni clusters with the polyethylene matrix occur with the formation of a less magnetic phase. When the Co-HDPE material is heated above 420 K, Co clusters coalesce to form a more magnetic phase. At temperatures above 520 K, the magnetization of the Co/HDPE system begins to increase rapidly and approaches the value characteristic of massive cobalt. Changing the conditions of cryosynthesis significantly influences the properties of the resulting products. The sample of 2.5% Co-HDPE obtained at a temperature of 185 K is characterized by weak magnetic properties. Its magnetization at room temperature is lower than that of the samples with a similar metal content by 30-40 times. The XPS shows that nickel atoms are in the form of Ni(OH)2.
Microscopic research of amorphous alloys AlFeNiLa exposed to magnetic pulse processing
Authors: Viryus A A , Kaminskaya T P , Shipko M N , Bakhteeva N D , Korovushkin V V , Savchenko A G , Stepovich M A , Savchenko E S , Todorova E V 
Published: May 2020

Abstract
The structure of the solid solution foil Al85Fe7Ni5La3 was studied, obtained by the spinning method, before and after magnetic pulses treatment. Comparison of the effects of pulses of weak magnetic field on the topology of the alloy surface allows us to conclude that when exposed to 30 pulses, the surface becomes more smooth. It was found that treatment with magnetic pulses significantly affects the magnetic characteristics of the alloy, which may allow this type of effect on amorphous alloys to be used in practice.
Rheological properties of Y3Al5O12 powder obtained by preceramic organoyttroxanealumoxanes
Authors: Titov D D , Gumennikova E A , Danilin K D , Petrakova N V , Lysenkov A S , Frolova M G , Shcherbakova G I , Novokovskaya E A , Lemeshev D O , Kargin Yu F 
Published: May 2020

Abstract
Submicron powder Y3Al5O12 (YAG) aluminium yttrium garnet was synthesized from an Al-Y-ceramic-forming precursor, according to the method developed in the State Research Institute for Chemistry and Technology of Organoelement Compounds (SRICTO). The advantage of the method is the possibility of obtaining close to the stoichiometric phase and obtaining high purity nanopowder. In this work, we studied the effect of the pyrolysis temperature of the polymer (700°, 800° and 900°C) and grinding time on the rheological properties of the powder. It was shown that after pyrolysis at 700° and 800°C, the powder has an amorphous structure, the ultimate strain, in this case, being 6.1 and 8.1% of the initial size. The compressibility modulus decreases with increasing temperature from 34.5 to 19.4 MPa. Due to the formation of YAG crystals after pyrolysis at 900°C, the compressibility of the powder increases and the compacts become denser.
Effect of rotary swaging on structure and properties of low-carbon steel
Authors: Tokar A A , Lunev V A , Dolzhenko A S , Rybalchenko O V , Morozov M M , Yusupov V S , Rybalchenko G V , Odessky P D , Dobatkin S V 
Published: May 2020

Abstract
The structural transformation and mechanical properties of a low-carbon 0.2% C steel and a 0.09% C-Mn-V steel in coarse- and ultrafine-grained (UFG) states were studied. The UFG structure with structural elements about 210-375 nm in size was obtained by rotary swaging (RS) and equal-channel angular pressing (ECAP). ECAP was used to compare the influence of the industrial deformation and SPD methods on the micro structure and properties of low-carbon steels. It was shown that an increase in true strain ratio and a decrease in final temperature of RS improve strength properties and reduce plasticity of these steels. In both steels after RS, σ
UTS
within the range from 800 up to 920 MPa with elongation in the range of 15-17% at the final deformation temperature of 400 °C was obtained. It was found that the strength of 0.2% C steel after ECAP was on the same level with that steel after RS. The strength properties of low- carbon 0.09% C-Mn-V steel after ECAP were significantly higher than those after RS.
Research of mechanical properties of composite material based on titanium nickelide with a titanium surface layer depending on magnetron sputtering time
Authors: Nasakina E O , Sudarchikova M A , Tsareva A M , Sergiyenko K V , Konushkin S V , Kaplan M A , Baikin A S , Shatova L A , Sevost’yanov M A 
Published: May 2020

Abstract
The regularities of the titanium surface and transitional monolayers formation using magnetron sputtering and ion bombardment depending on the deposition time, adhesion parameters and mechanical characteristics are investigated. Saturation regions of the surface and transition layers are noted. The transition layer provides high adhesion of the surface layer to the substrate. The application of a titanium surface layer to a nitinol reduces elongation and yield strength but increases tensile strength, and as the deposition time increases, the elongation decreases very slightly, and the yield strength and strength increase.
Studies of the effectiveness of the chemical decomposition of polychlorinated biphenyls in alluvial meadow soils in situ under the influence of special physicochemical active compounds
Authors: Yu Aladin D , Sevostyanov S M , Ph Deeva N , Demin D V 
Published: May 2020

Abstract
Polychlorinated biphenyls (PCB) are persistent organic pollutants used worldwide up 1990s. Although their use has been heavily restricted, PCB can be found in contaminated soils and sediments. The interaction of polychlorobiphenyls (PCBs) in soils with an alkaline amino acid reagent (NaL) and humic acids was studied. According to IR spectroscopy, intermolecular interaction of PCBs with NaL reagent was revealed. Chromatography and IR spectroscopy revealed the transformation and removal of chlorine in the aromatic ring of PCB macromolecules under the influence of an amino acid reagent. In the experiment, from 32 to 77% of PCBs undergo soil degradation, depending on the concentration of the reagent and the frequency of its introduction into soil samples.
Laser airborne reflection method for remote sensing forest species composition
Authors: Belov M L , Belov A M , Gorodnichev V A , Alkov S V 
Published: May 2020

Abstract
Statistical modelling of the correct detection and false alarm probabilities has been implemented to identify dominant (needle-leaved or broadleaved) tree species through laser sensing in the UV and NIR spectral bands. It is shown that the laser method of monitoring at 355 nm and 2100 nm wavelengths allows sensing dominant needle-leaved or broadleaved tree species with a probability of correct detection close to one and a probability of false alarm ~ second decimal places. The laser method using two eye-safe sensing wavelengths in the UV and NIR spectral bands can be used for airborne forest monitoring.
Increasing wear resistance of the hinge guide compressor in aircraft engine
Authors: Alisin V V 
Published: May 2020

Abstract
The article is devoted to the problem of increasing reliability and a service life of the cylindrical hinge for turning the blades of a guide axial compressor of aircraft engines under sliding friction without lubrication. The prospects of using nanostructured crystals of zirconium dioxide partially stabilized by yttrium oxide are justified. High anti-friction properties of the hinge are provided by the selection of the counterface material. Particular attention is paid to the resistance to scoring of the studied friction pairs. It has been established that the most promising counterfaces for the crystals of zirconium dioxide are molybdenum selenide coatings and alpha-titanium alloys.

A post-publication change was made to this article on 11 Jun 2020 to correct the pdf so that it matched the webpage.
Resistance moment of a rotation surface of liquid rocket engines turbomachines elements
Authors: Zuev A A , Nazarov V P , Zhuikov D A , Tolstopyatov M I , Savelyeva M V 
Published: May 2020

Abstract
The research elaborates the main characteristics of the liquid propellant engines; it determines that some turbo pump units have got the frequency of rotor spinning up to 100 000 and even 120 000 r.p.m. The authors analyse the current methodologies to specify losses connected with disc friction. The methodologies determining disc friction coefficient often obtain criterion-empirical character, and due to increasing a number of rotor spinning of turbo pump unit of the liquid propellant engines, they reflect the specification reliability inaccurately. The research demonstrates equations to determine disk friction coefficients based on considering the theory of three-dimensional boundary layer to a rotational flow taking into account the turbulent process of velocity distribution. The authors give recommendations on determining an index of velocity distribution degree depending on Reynolds rotation criterion of a disc and plug flow.
Hydraulic losses in the initial section of a flow parts of at aggregates of liquid rocket engines
Authors: Zhuikov D A , Zuev A A , Nazarov V P , Tolstopyatov M I , Khodenkova E V 
Published: May 2020

Abstract
The article deals with the need for accurate hydraulic losses determination along the length of the flow part in the process of designing units for supplying liquid rocket engines (LRE). The dependencies that are usually used, as a rule, are of a criterion-empirical nature and are not suitable for their application, taking into account the tendency of an increase in the rotating speed of turbo-pumping LRE supply units to 100,000 r.p.m. The analysis necessary to select the friction resistance laws for the flow part elements of the rocket engine supply units was carried out. A numerical integration equation system method to determine the variation in the characteristic thicknesses of the spatial boundary layer along the channel length in the initial section of the flow and hydraulic losses (taking into account the inertial component of the flow core velocity) was considered and proposed, depending on the current flow regimes in the flow path elements of the LRE supply units.
Influence of diffusion metallization to hard alloys of WC-TiC-Co and WC-Co with functional TiC coating by Ni-Cu
Authors: Bobylyov E E , Storozhenko I D 
Published: May 2020

Abstract
Diffusion alloying effect of WC-8%Co and 15%TiC-WC-6%Co hard alloys by Ni-Cu over TiC deposited by diffusion alloying in a low-melting liquid metal medium melt has presented. Such operation abilities of cutting tool as toll life, wear resistance, quality of processed surface can be increase by diffusion alloying in liquid metal melts. Tool life increased by 2.5 times compared to uncoated tools. It was found that kinetic of coating formation depends of the temperature and alloying time. The thickness of the diffusion layer varied up 8 to 27 microns on WC-8%Co; up 9 to 29 microns for 15%TiC-WC-6%Co alloys. The maximum microhardness on 15%TiC-WC-6%Co alloys was 21500 MPa, for WC-8%Co alloys 18000 MPa. It was found that element-phase composition of hard alloy influence to kinetic of diffusion functional coating formation process. Functional diffusion layer on 15%TiC-WC-6%Co alloys have a higher hardness and thickness compared to WC-8%Co.
Dry etching of silicon carbide in ICP with high anisotropy and etching rate
Authors: Osipov A A , Speshilova A B , Endiiarova E V , Osipov A A , Alexandrov S E 
Published: May 2020

Abstract
A detailed study of the influence of technological parameters of the plasma chemical etching process in inductively coupled plasma on the etching rate of single-crystal silicon carbide is presented. The physicochemical substantiation of experimentally revealed patterns is given. The optimal gas mixture was determined in terms of the etching rate of SiC. It was experimentally established that the dependence of the etching rate of silicon carbide on the percentage of oxygen in the total gas mixture is non-linear. Thus, with an increase in the percentage of O2 up to 23%, the etching rate of SiC gradually increases to 560 nm/min, a further increase in the percentage of O2 leads to a sharp decrease in the etching rate of SiC up to 160 nm/min at an oxygen content of 31%. The effect of the distance between the sample and the plasma generation zone on the etching rate of SiC was studied. It was shown that the greatest increase in speed is caused by an increase in the bias voltage, so at Ubias = - 50 V the etching rate is 300 nm/min, and at Ubias = - 150 V the value of the etching rate is 840 nm/min. The optimal parameters of the plasma-chemical etching process were selected for high-speed directional etching of single-crystal silicon carbide substrates.
The analysis of the working surface of the abrasive tool for wood grinding
Authors: Sergeevichev V V , Sergeevichev A V , Sokolova V A , Kebko V D , Alekseeva E A 
Published: May 2020

Abstract
The analysis of the existing models of the cutting elements of abrasive grains shows that the model in the form of a parabola is in comparison with others more preferable and with a fine precision corresponds to the experimental geometrical parameters of abrasive grains. The natural increase in radius of top due to wear is revealed.
Comparison of apparatus and methods for tactile marking of polymeric films with Braille alphabet
Authors: Cherkasov E P , Konovalova M V , Kondratov A P 
Published: May 2020

Abstract
This article analyzes contact and non-contact methods for local heat treatment of heat shrink films in tactile marking devices. The characteristics of polymeric film heating processes under heat transfer from metal stamps and laser emitters were investigated. The article contains diagrams obtained by differential scanning calorimetry of polymeric heat shrink film exposed to thermal effect of different tactile marking devices. The article also describes stereometry of Braille elements obtained by using a metal stamp and a laser emitter.
Reducing noises of high-speed Bi-JFET charge-sensitive amplifiers during schematic design
Authors: Dvornikov O V , Tchekhovski V A , Prokopenko N N , Pakhomov I V 
Published: May 2020

Abstract
The technique of circuit noise reduction of charge-sensitive amplifiers containing bipolar and junction field-effect transistors is considered. The initial and improved circuit of the integrated charge-sensitive amplifiers using the above mentioned technique, the results of the step-by-step noise reduction when changing the sizes and operating modes of transistors, and improvement of the bias circuits are presented.
Prediction of service life of auto-tractor engine parts
Authors: Shekikhachev Y A , Batyrov V I , Shekikhacheva L Z , Bolotokov A L , Gubzhokov H L 
Published: May 2020

Abstract
Wear and fatigue are phenomena that limit to some extent the reliability of mechanical systems in almost any modern machine. Traditionally, reliability indicators of power parts of machines are evaluated differentially, according to individual criteria. This is often justified, since in the design of machines there are a lot of parts that “work” only on fatigue under repeated-variable loads. There are also parts that “work” exclusively in conditions of friction, sliding or rolling. However, in reality there are also mechanical systems in which a combination of both phenomena takes place. For example, these are such systems as: “crankshaft-connecting rods of piston engines”; “gearing, camshaft-cam follower”; “axis bearings of centrifugal machines”; “details of the chassis of the car and tractor”; “wheels of rolling stock-rails of the railway track” and a large number of other critical structural elements of various machine components. Consequently, the entire range of scientific research in the design, manufacture and repair of machines should be aimed at ensuring fundamental transformations in technology and creating the prerequisites for the scientific justification of both methods for calculating the accuracy of mechanisms and all technological problems, from the design of the technological process as a whole to a thorough mathematical modeling of its individual components. The currently used methods for calculating the strength by safety factors in a deterministic formulation do not sufficiently take into account the scattering of the characteristics of fatigue resistance, the random nature of the loading of parts and do not provide an estimate at the design stage of the distribution function of the resource of machine elements. At the same time, it is possible to correctly determine the indicators of machine reliability and durability on the basis of these functions.
Robotic facilities resources of the future mechatronic factories
Authors: Shukalov A V , Zakoldaev D A , Zharinov I O , Zharinov O O 
Published: May 2020

Abstract
The practical problem is to project robotic facilities resources, which are used in the future mechatronic factories. Mechatronic factory robotic facilities resources are software and hardware components of dynamic self-organization factories placed in the intelligent robotic systems (IRS). A structural scheme, which describes the IRS components interaction, which is the base for together unified image of robotic facilities resources in the physical IRS (cloud IRS) is shown. A cyclic diagram of the IRS physical and cloud components interaction is shown. A structural scheme, which describes multi-functional convergence of physical IRS and cloud IRS is shown. Obviously, that robotic facilities resources as a cloud service is the most universal form of the future mechatronic factory in the industrial. Robotic facilities infrastructure primary components are defined, which are necessary to project future mechatronic factory, which specialty in engineering.
Small specialized digital manufacturing in mechanical engineering
Authors: Platonov V V , Sagalakova M M , Timchenko V V , Zheltobruhov E M 
Published: May 2020

Abstract
The problems of creating small specialized digital industries and their role in mechanical engineering are touched upon in this article. It is emphasized that the use of digital technology and modernization of the equipment of existing enterprises for digital technology can bring metal processing to a new higher technological level.
Ensuring industrial safety of pipelines with developed hard sections
Authors: Zharinova N V , Vakulenko M V 
Published: May 2020

Abstract
Oil refining and petrochemicals have a wide demand for pipelines from heat resistant chromium steels. One of the main reasons for frequent failures of more stressed joints may be the presence of wide solid and brittle layers having significant areas in metal volume with maximum clusters of imperfections of metal structure and creating excessive concentration of additional residual deformations and stresses in welded joints, which are most saturated with defects inherent in welded joints. Presence of such extended sections leads to reduction of process strength of welded joints, increases tendency to formation of cold cracks and sharply limits time of laying of thick-walled welded joints of pipelines before subsequent high-temperature thermal treatment. The work carried out studies on welding pipe blanks in order to compare different methods of 5CroMo16 steel treatment during welding and determine the most efficient mode. Regularities of stressed state of different-module structural elements with wide solid layers are established.