bluuebunny/crossref_metadata_2025_split huggingface dataset:
The identification of internal defects in integrated circuits with the use of acoustic microscopy
Authors: Bolebruh O N , Arslanov V A , Ekimova T A , Belyaev M A 
Published: September 2020

Abstract
The paper presents a methodology for identifying internal defects in integrated circuits and determining their type using scanning acoustic microscopy. Examples of images of the most common defects in various projections are given. The presence of defect was confirmed by optical inspection of samples’ cross-section. The presented data will be useful to specialists in ultrasonic testing to identify inconsistencies in the process of packaging integrated circuits.
Comparison of parameters of heteroepitaxial structures
Authors: Tashatov A K , Beytullayeva R X , Ungbayevich T T , Pardayevich U A , Yunus O 
Published: September 2020

Abstract
In this work, the structure and properties of heteroepitaxial and multilayer thin film systems obtained by thermal diffusion, MBE, and ion implantation have been comprehensively studied created.
CdAs2 – MnAs system investigation
Authors: Ril A , Marenkin S 
Published: September 2020

Abstract
CdAs2 semiconductor and the MnAs ferromagnet interreacting was analyzed with MnAs X = 0- 60 mol%. The phase diagram and eutectic curve were created (coordinates - 6 mol% MnAs and Tm
eut. = 614 °C). System CdAs2 - MnAs is ferromagnetic with TCurie = 353K. A negative magnetoresistance effect was detected with ΔR / R = 2-3 % in a saturation magnetic field - 0.7 T. The negative magnetoresistance effect detection shows the perspective of the CdAs2 with MnAs alloys as spintronics materials.
Simulation of rift element forming by magnetic-pulse deformation
Authors: Kurlaev N V , Ahmed Soliman M E 
Published: September 2020

Abstract
One of the most common operations of magnetic pulse sheet stamping is the formation of a rift and stiffeners, which are widely used in aircraft manufacturing. Reducing labor intensity while maintaining the required quality parameters of the obtained parts is one of the most relevant issues of sheet stamping. The solution to this problem should provide, with given tolerances on the geometric dimensions of the part, the requirements for the surface condition, strength and performance characteristics of the product. A necessary condition for the implementation of this goal is the absence of signs of technological defects, in particular, the formation of waves, corrugations, ligaments in the areas of the part on compressed and compressed-stretched sections of the workpieces. In this paper, to study the stress-strain state of a rift workpiece in forming – drawing processes using control elements, the finite element method was used. An example of numerical simulation of the electromagnetic forming of a rift with the obtained mesh shape of a workpiece without a corrugation defect or metal shrinkage is given.
The study of the force parameters of complex loading during thermal-force processing
Authors: Semenov K O , Rastorguev D A 
Published: September 2020

Abstract
The article considers one of the methods for reducing and stabilization residual technological stresses in low-rigid parts which relates to the field of thermo-force processing with simultaneous straightening of the workpiece. The study’s results of the force modeling taking into account the influence of temperature during thermo-force processing of stainless steel samples are presented. The torsion moment as an additional force load in combination with the tensile force is used. Dependencies and results of research are presented for the stress state using the combined action of torsion moment and axial force at different temperatures taking into account relaxation processing. Recommendations are given for improving existing and developing new devices and technologies in the field of thermal-force processing of low-rigid shaft-type parts.
Simulation of expansion a branch-pipe with «blinds» by the pressure of magnetic field
Authors: Kurlaev N V , Ryngach N A , Tagoev F M , Ahmed Soliman M E 
Published: September 2020

Abstract
Thin-walled tubular structures that are used to connect units and supply gas or liquid are widely used in aircraft devices. Aircraft pipelines have a complex cross-sectional profile, large differences in size, the presence of different holes, shape changes, stiffeners, etc. Often, such parts have insufficient indicators of durability during the process of maintenance. The main reason is the use of traditional technological processes in the production of such parts. This paper presents an analysis of electrodynamic processes during magnetic - pulse «expansion» of thin-walled tubular parts. To carry out the technological process, separation operations plus calibration, a branch-pipe was chosen, which serves to mix the flows of hot and cold air in the aircraft air conditioning system. A prerequisite for the achievement of this goal is high demands on the quality of the internal and external surfaces, shape retention, minimal thinning of the walls.
Industry 4.0 - new challenges for production
Authors: Alekseev A M , Borisov A I 
Published: September 2020

Abstract
The article presents the results of the analysis of features of formation of new economy on the basis of the concept Industry 4.0. The research of problems of transition to a new development level, increase of innovative activity rates, increase of flexibility and adaptability of business systems cause high interest of scientific community of different countries of the world. Growing digitalization dictates new conditions for the economy functioning and development. Within this context the paper considers the issues of defining the essence of digital economy, its specific features, basic technologies of Industry 4.0. The main processes to be transformed to implement the concept at enterprises are determined, and competitive advantages, achieved in the digital economy as a whole, are highlighted. The main challenges have been investigated and specific gaps that need to be overcome in order to develop the digital economy in Russia have been formulated. Therefore, the research topic is relevant in modern conditions of development of the global economy.
A study of strength fluctuations of Portland cement by FTIR spectroscopy
Authors: Tararushkin E V , Shchelokova T N , Kudryavtseva V D 
Published: September 2020

Abstract
The study of daily tests (1-28 days) for compressive strength of ordinary Portland cement is presented. The daily strength curves were obtained for two water cement ratio (W/C=0.4 and W/C=0.5). On both curves, intervals with strength fluctuations were identified. For cement paste with W/C=0.4, one interval with fluctuations was detected (13th-18th days), for cement paste W/C=0.5, two intervals with fluctuations were detected (13th-17th days and 21st-25th days). The largest value of decrease in average strength for samples with W/C=0.4 is -7.1 MPa, for samples with W/C=0.5 the largest value of decrease in average strength is -2.7 MPa. For cement paste samples with W/C=0.4 for 15th-18th days, infrared spectra were obtained by Fourier-transform infrared spectroscopy. The analysis of the FTIR spectra showed that the strength fluctuation may be caused by the formation of a sulfate phase (ettringite) during hardening of the cement paste.
Improvement of abrasive machining performance in mining machinery manufacturing based on the use of innovative structures of tumbling bodies
Authors: Shatko D B , Lyukshin V S , Strelnikov P A 
Published: September 2020

Abstract
At present, the domestic engineering industry as a whole and mining machinery manufacturing in particular undergo a difficult period due to the imposition of sanctions and the ensuing crisis economic phenomena. In the absence of an acceptable rate of import substitution caused by the low competitiveness of manufactured products, mechanical engineering enterprises are forced to look for ways to ensure the production of modern mining equipment that meets the requirements of consumers. This is especially important in light of growing trends of the transition from raw materials export to the industry-oriented line of development of the domestic economy. In the face of a decrease in the share of mechanical engineering in the gross product of the Kemerovo region by several times in recent years, it is imperative to increase the competitiveness of mechanical engineering enterprises. For the successful achievement of this objective, it is important to update the existing manufacturing facilities, including through the introduction of new advanced technologies. Based on this, an important and urgent task aimed at improving the rate of domestic production is the search, substantiation and implementation of innovative competitive technologies in mining machinery manufacturing. One of the promising areas in this field is to increase the efficiency of abrasive machining of mining equipment parts during tumbling operations.
Steam coal engineering solutions
Authors: Terentyev S E , Zakharenko I K , Shcherbachenko P S , Gibadullin A A , Morkovkin D E 
Published: September 2020

Abstract
As part of the study, the volumes of coal production and use in the industrial and domestic sectors were analyzed. The analysis showed that in Russia the volume of coal production is increasing, which is associated with the prevailing technologies for the use of coal in industrial production and the impossibility of their restructuring and transformation for new types of fuel. At the same time, the study revealed that there is a decrease in the share of coal generation, but at the same time, coal-fired thermal power plants emit about 13% of carbon dioxide in Russia. In the work, an engineering solution was proposed in the field of coal generation, which should provide an increase in the efficiency of coal use in the manufacturing and domestic sectors. At the end of the study, the necessary conclusions were drawn on the results of the work done.
Plasma electrolytic treatment of Ti6Al4V alloy in electrolytes with boron-containing compounds
Authors: Kusmanov S A , Tambovskiy I V , Kusmanova I A , Belkin P N 
Published: September 2020

Abstract
Tests of aqueous solutions were carried out in order to verify their suitability for boriding and borocarburizing of titanium alloy. The state of the modified layer was examined using an electron microscope. The regimens effect on the layer properties hardness and roughness was clarified. The electrolyte compositions used provided the hardening of zone with a thickness of 0.2 mm and a maximum microhardness of up to 965 HV after boriding and layer of 0.35 μm with 880 HV after borocarburizing. The layers were established to demonstrate the best properties at the processing temperatures from 900 °C to 1000 °C for 5 min. A regime has been determined that provides a diminishment of roughness Ra from 1.01 μm to 0.55 μm.
Analysis of crack formation of an Al-Mg-Li (1420) system alloy under the influence of thermal energies
Authors: Agafonova D V , Mikheev V A 
Published: September 2020

Abstract
Cracks of all types are extremely dangerous for structures; this fact is critically unacceptable in the rocket and space industry. Aluminum-lithium alloys have a perfect set of mechanical, operational and corrosion characteristics that allow them to compete with traditional alloys and even polymer composite materials. The main focus of scientific research was the analysis of crack formation when combining two successive methods of heating samples of the promising rocket and space industry alloy 1420: discrete isothermal scanning and continuous program heating. The relationship between such factors as the average elongation of cracks in the sample, the number of cracks in the sample, changes in the area of the sample relative to the degree of compression of the material, the heating temperature of the sample, the exposure time in the furnace, the number of rolling passes, and rolling speed were revealed in the paper.
CVD diamond structures for fast neutron detection
Authors: Polushin N , Laptev A , Chernykh S , Didenko S 
Published: September 2020

Abstract
The first test results of synthetic diamond grown by CVD for a fast neutron detector are reported. The detector has size - 5 × 5 mm. The Pt contacts formed to both substrate sides were 4×4 mm. The detector was irradiated by 14 MeV neutrons from a D-T generator. The obtained registration efficiency was 0.63 · 10−2 pulses/neutron.
Tribological properties of a plain bearing with a sleeve made of a nanostructured zirconia crystal
Authors: Alisin V V , Borik M A , Kulebyakin A V , Lomonova E E 
Published: September 2020

Abstract
The article deals with the issues of the working capacity of a plain bearing with a sleeve made of nanostructured partially stabilized zirconium dioxide. The tribological properties of the shaft-sleeve interface under boundary friction conditions are investigated. An X-ray phase analysis of samples of zirconium dioxide crystals with various additives of yttrium oxide stabilizer has been performed. The optimal composition for the manufacture of bearing bushings has been selected. A procedure for tribological testing of a sliding bearing has been developed. Special attention is paid to the influence of the clearance between the shaft and the bushing on the tribotechnical characteristics of the interface. The calculation of the wear rate of the sliding bearing is carried out taking into account the clearance. A method for calculating the service life of a bearing is proposed. The prospect of using nanostructured crystals of zirconium dioxide for the manufacture of sleeve bearing bushings for precision mechanisms and devices has been experimentally confirmed
Lubricants to reduce wear of wheels and rails high-speed rail transport
Authors: Alisin V , Pokidko B , Roshchin M , Simakova G 
Published: September 2020

Abstract
The article is devoted to the study of colloidal lubricant to reduce wear of the friction surfaces of wheels and rails high-speed rail transport. The disadvantage of almost all known lubricants for rails lubrication manufactured according to conventional techniques, which include the content of base oils crushed to a fine state particles, are problems associated with sedimentation of the particles and the clogging of filters. Discussed in the article, the lubricant is free from these disadvantages. The results of tribological bench tests of various lubricants for rails in the velocity interval of 40-100 m/s on a “bridge analogy”. Proposed recommendations for use of the developed lubricant for lubrication rails.
Stability evaluation of cutting edges during operation of composite materials for instrumental purposes based on a metal matrix
Authors: Fedotov A A , Safonova M N , Syromiatnikova A S 
Published: September 2020

Abstract
The development of new, highly informative methodological tools for diagnosing the characteristics and assessing the quality of diamond powders and powders of other superhard materials based on modern technical means of obtaining initial data is an important and relevant scientific and applied task. The direct practical use of diamond powders is preceded by a procedure for establishing the values of their operational properties and characteristics. The results of assessing the stability of the cutting edges of abrasive composite materials are equally important for both powder producers and their consumers. The productiveness of grinding tools is largely dependent on the degree of use of the cutting properties of the grains. Premature loss of grains from the bundle leads to increased wear, and sometimes to a complete loss of tool performance.
Wireless Holter monitoring system with a dual-core processor
Authors: Ivel V P , Gerasimova Y V , Moldakhmetov S S , Petrov P A , Gerasimov I A 
Published: September 2020

Abstract
The article discusses the principles of building a wireless automated system for heart activity Holter monitoring using a WiFi module based on a dual-core processor. The system is focused on use in a medical cardiology center or at home. The article proposes the method of wireless transmission of an electro-cardio signal based on the paralleling of processing operations and Wi-Fi transmission of an electro-cardio signal. The paper presents algorithms for wavelet compression and filtering of the transmitted electro-cardio signal that ensure high reliability of the transmitted ECG information. A semi-realistic model of the Holter monitoring system has been developed, including real-time packages of the Matlab system, a PhysioBank ATM electro-cardio signal database, a hardware interface based on the PCI-1710HG Board and an external wireless ECG information transmission subsystem. The proposed methods and algorithms will provide high-quality and multi-day wireless transmission of ECG signals, characterized by low power consumption
The main factors, influencing the processes in the microwave field
Authors: Daminev R R 
Published: September 2020

Abstract
An important condition for effective application of microwave radiation as an energy carrier for carrying out technological processes is absorbing capacity of technological media of electromagnetic radiation of microwave range. The dissipation of the electromagnetic field in a substance depends on its composition and properties. The effect of electromagnetic radiation on the process medium when creating conditions of volumetric heating of the substance can provide a high rate of temperature growth. Volume heating is possible when microwave radiation penetrates the substance. Electromagnetic radiation is absorbed to varying degrees by semiconductors and dielectrics. The absorbed amount of microwave energy depends also on the aggregate state of the substance, its density. More microwave radiation is absorbed in solids and liquids than in gases. The more electromagnetic energy is transferred to the internal energy of the medium, the higher the heating efficiency in the microwave field.
Interaction of Sn-Cu-Co powder materials with diamond in liquid-phase sintering
Authors: Sokolov E G , Ozolin A V , Gaponenko S A , Arefieva S A 
Published: September 2020

Abstract
The interaction of the Sn-Cu-Co powder material with diamond in liquid-phase sintering has been studied. The material contained commercially pure metal powders at the following proportion, wt. %: 21 Sn, 46 Cu, 33 Co. Metal powders and synthetic diamonds AS150 were mixed with the organic binder and applied on a steel base. Sintering was performed in vacuum at 820–1100°C. The structure of sintered materials is investigated by X-ray diffractometry, scanning electron microscopy and energy dispersive X-ray microanalysis. It has been found out that at sintering temperatures of over 900°C, the liquid phase wets and dissolves diamonds due to its containing cobalt. When the material is cooled down after sintering, the dissolved carbon crystallizes on the surface of diamonds in the form of graphite flakes, which leads to the formation of a weak layer between diamonds and the metallic matrix.
Specific surface defects arising from diamond CVD-synthesis from methane-hydrogen plasma
Authors: Martynova T V , Polushin N I , Laptev A I , Zakharova E S , Maslov A L 
Published: September 2020

Abstract
Diamond is unique material that have long been known to humanity. It has extra high hardness, thermal conductivity, as well as unique electrophysical characteristics that can be managed by changing its impurity composition. Therefore, this material has gained the potential of widespread use in engineering, which is currently complicated by the high cost of diamonds, difficulties of its synthesis, mechanical and physical processing. A promising direction for obtaining high-quality poly- and single crystals and, accordingly, expanding the areas of diamond use is the method of its deposition from the gas phase (CVD). The main problem that researchers face during deposition the diamond is the formation of surface defects in the growth zone. In this work, we discuss defects observed on single-crystal diamond CVD-films of 300-500 μm thick obtained from methane-hydrogen plasma with 3% methane. The surface was studied by scanning electron microscopy. As a result of the work, we revealed that during the diamond films CVD-growth mainly three types of defects are formed: etch pits, isolated diamond particles (“straying” diamonds) and coarse-grained diamond formed along the diamond plates periphery. Methods for eliminating these defects are proposed.
Accumulated reliability of information hardware and software systems
Authors: Titov E K , Tsvetkov V Ya 
Published: September 2020

Abstract
The paper’s purpose is to study the accumulated reliability of information hardware and software systems. The difference between hardware and software systems and information hardware and software systems is shown. A feature of information hardware and software systems is the software components presence. The software components allow for the possibility of eliminating errors during operation. This creates a condition for increasing the information hardware and software systems’ reliability during operation. The removable and non-removable errors concept of software components is introduced. The initial failure rate and limiting failure rate concept is introduced. Based on the analysis, the accumulated reliability concept is introduced, which is higher than the information and software systems initial reliability.
Study of the identification model of tribological interaction of friction couples
Authors: Ismailov G M , Tyurin A E , Gavrilin A N , Nevinitsyna V S , Lomovskaya S A 
Published: September 2020

Abstract
In this paper identification of dynamic systems under conditions of unlubricated friction is analyzed and problems related to the dynamics of materials frictional interaction are considered. Algorithms of automatic control and catastrophe theory were used to study frictional properties of materials. The authors developed a special device to study tribotechnical characteristics of materials. A mathematical algorithm for studying the tribological contact in the form of a tribological system based on the input-output models is presented. The scope of application, requirements for input and output data, use of the algorithm in case of contact surface evolution are determined. The results obtained indicate the nonlinear friction behavior for friction couples PTFE-Copper, PTFE-Steel and PTFE-Titanium. The relationship between the stability of the system and changes occurring in the tribocontact was found. Processing of obtained dynamic characteristics of tribological interaction of friction couples shows periods of material wear and energy consumption for the formation of a new surface in terms of time
High-resolution lightweight dual-frequency aircraft synthesized aperture radar for remote-sensing of the Earth: implementation experience and development prospects
Authors: Rovkin M E , Samuleev M S , Malyutin N D , Ermakov R V , Djakov I V , Dostovalov M Yu 
Published: September 2020

Abstract
A prototype of a dual-frequency aviation synthetic aperture radar station for remote sensing of the Earth, suitable for use on light-engine and unmanned aerial vehicles, is described. The system’s concept, main technical solutions, and results achieved in the creation of onboard equipment are considered. The results of flight tests of the SAR prototype carried out in 2019 are presented. The characteristics of the radar survey are described. Possible ways of further development of the system are discussed.