bluuebunny/crossref_metadata_2025_split huggingface dataset:
A structure formation in Ti-Ni powder after high-energy mechanical treatment
Authors: Abdulmenova E V , Kulkov S N 
Published: May 2020

Abstract
In this work a structure formation in Ti-Ni powder after high-energy mechanical treatment in a planetary ball mill with an acceleration of 60g are presented. Mechanical treatment time of powder was 5-300 seconds. It was shown the powder in initial state consists of phase mixture TiN (B2, B19`), Ti2Ni (E93) and TiNi3 (D024). The lattice parameters of powders not significantly change at mechanical treatment and correspond in good agreement with literature data. The quasi-amorphous phase is formed after mechanical treatment and the relative content of phases change so that the relative content of quasi-amorphous phase increases steeply from 0 % to 45 % in first 10 second of treatment mechanical treatment and not significantly changes at more prolong milling. The full widths at half maximum of peaks not significantly change to 10 second mechanical treatment, but the more prolong milling leads to them increasing due to forming of dislocation in all phases, wherein the value of the dislocation density of Ti2Ni phase is more than of TiNi and Ni3Ti phases and corresponds to 1013 cm−2 at 60 second of mechanical treatment.
Inhibitors based on new polysaccharides in technological processes of oil production. Efficiency of inhibition of scale formation and influence on stability of water-oil emulsion
Authors: Fakhreeva A V , Voloshin A I , Telin A G , Magadova L A , Spirikhin L V , Dokichev V A 
Published: May 2020

Abstract
Functionalized nitrogen-containing polysaccharides based on available low molecular weight sample of carboxymethylcellulose (CMC) with a molecular mass of 90 thousand and mono-, di- and tri- ethanolamine were obtained. The study of CMC salts with ethanolamine as inhibitors of salt deposition was carried out at 80 °C by capillary testing. It was shown that at the concentration of 10-30 mg/l these salts inhibit the processes of scale deposition of CaCO3 and their efficiency is 53-80%. Rheological and sedimentation characteristics of artificially obtained water-oil (w/o) emulsions based on oil of the Priobskoye oilfield without and in the presence of low molecular weight sodium salt of carboxymethylcellulose (NaCMC) were studied. It was found that the NaCMC does not increase the viscosity and stability of W/O emulsions at concentrations of 50, 100, 200 mg/l.
Problems of aviation leaded gasoline application on aircraft
Authors: Gryadunov K I , Nemchikov M L , Melnikova I S , Timoshenko A N 
Published: May 2020

Abstract
Special aviation gasoline with specified operational properties is used for aircraft piston engines. The level of operational properties indicators is specified by the special additives introduction. One of these additives is an antiknock additive – tetraethyl lead. The influence of tetraethyl lead contained in aviation gasoline on the oil systems of aircraft piston engines operation are shown in the article. The insignificant content of TEL decomposition products in aviation oils sharply worsens their pumpability and leads to complete fine oil filters clogging in a few minutes of engine operation, which is negative from the point of view of flight safety.
The application of copper-containing nanoparticles as a gas nitriding catalyst
Authors: Yu Isaeva I , Eliseeva E A , Morenko I V , Aleksandrov V A , Yu Ostaeva G 
Published: May 2020

Abstract
The results of the study of the possibilities of using copper-containing nanoparticles obtained by pseudomatrix synthesis as a catalyst for cyclic gas nitriding of steel products were presented in this paper. It was shown by the example of steel 08Yu (corresponding to the European standard of steel DC04/DC03 EN 10139) that the preliminary application of nanocomposite-catalyst including copper-containing nanoparticles and macromolecules of poly-(N-vinylpyrrolidone) polymer pseudomatrix to the product significantly intensified the chemical heat treatment process. It was found that under identical treatment process conditions the thickness of the diffusion layer for a sample with a pre-applied nanocomposite was 90 urn, and without such pretreatment — 42 urn It is noted that the achievement of this effect is due to the catalyst synthesis peculiarities, which allows to obtain a copper sol with a narrow size distribution of particles resistant to aggregation.
AC electrochemical oxidation of nickel and VNZh alloy in alkaline-ammonium solutions
Authors: Kuznetsova O G , Levin A M , Sevostyanov M A , Tsybin O I , Bolshikh A O 
Published: May 2020

Abstract
It was studied the electrochemical oxidation of nickel in an electrolyte of the composition NaOH 2M + NH4OH 4M by using linear and cyclic voltammetry. A significant increase in the process rate has been revealed due to the cathodic polarization of the electrode under study. It was shown the possibility of heavy tungsten alloy processing, such as VNZh-type alloy (in wt%: 78.8 W, 15.2 Ni, 6.0 Fe), under the influence of alternating electric current of industrial frequency in alkaline-ammonium solutions.
Development of scientific and technological bases of processing of cast iron from thermal timing and ladle processing method of the resonant intermittent refining
Authors: Lubyanoi D A , Markidonov A V , Nevolin V M , Lubyanoi D D , Kambalin I O 
Published: May 2020

Abstract
The paper considers the application of the technology of resonant pulsating refining to improve the quality of cast iron products. This technology is used in the production of molds from pig iron and induction cast iron. It is characterized by comparative simplicity and easily fits into existing production. The effectiveness of this technology is at the level of the best world indicators.
21R-Sialon ceramics, obtained by hot pressing
Authors: Lysenkov A S , Stolbova M O , Titov D D , Plokhikh A I , Kim K A , Gridin D V , Frolova M G , Petrakova N V , Danilin K D , Lemeshev D O , Kargin Yu F 
Published: May 2020

Abstract
The formation, densification behaviour and mechanical properties of 21R polytype were studied. Self-propagating high-temperature synthesis obtained the starting powder of 21R-sialon. Sealing was carried out by hot pressing in the temperature range 1650-1800°C. With increasing temperature, there is an increase in density and mechanical properties.
Application of mutagenic treatment of active silt for oxidation of cellulose nitrate
Authors: Saratovskikh E A , Avdeeva L V , Shcherbakova V A , Kazakov A I , Yarullin R N 
Published: May 2020

Abstract
The oxidation of native cellulose nitrate (13.38% N) and cellulose nitrate (CN) treated with UV radiation and ozone (UV+ozone) by a biocenosis of microorganisms of active silt (AS) from sewage disposal plants and by a combination of AS with sulfate-reducing bacteria Desulfovibrio desulfuricans BKM B-1388 and microscopic fungi Fusarium solani BKM F-819 was studied. The use of the preliminary treatment significantly increased the degree of decomposition of CN during its subsequent biodegradation by a symbiosis of AS microorganisms with D. desulfuricans and F. solani. The application of the mutagenic treatment of AS with nitrosomethylurea (NMU) allows the biocenosis of AS microorganisms with CN acting as a pollutant to retain high oxidation ability with good sedimentation properties for 65 days of incubation. The degree of decomposition was 24.36%. Substantial parameters were achieved during the incubation period of treated CN (CNtreat) within the first 5 days, which is promising from the point of view of practical use.
Research of the intermetallics formation mechanism during the synthesis of functionally graded layered steel-aluminum compositions
Authors: Mikheev R S , Kalashnilov I E , Bolotova L K , Kolmakov A G 
Published: May 2020

Abstract
The features of the formation and growth of intermetallic compounds in the production of functionally graded layered steel-aluminum compositions by the arc surfacing process have been revealed. The influence of the intermediate aluminum layer formed by the arc surfacing process on the diffusion zone formation mechanism has been shown.
Copper and cerium co-substituted hydroxyapatite: powders synthesis and sintering
Authors: Nikitina Y O , Petrakova N V , Egorov A A , Titov D D , Ashmarin A A , Barinov S M , Komlev V S 
Published: May 2020

Abstract
Copper- and cerium-substituted and copper-cerium co-substituted hydroxyapatite (HA) nanopowders were synthesized through aqueous precipitation method. The obtained materials were studied by XRD, SEM, BET absorption and dilatometry. The effects of the cation substitution for calcium ions in HA structure on the phase composition, lattice parameters, shrinkage and microstructure of the ceramics were studied and discussed. It was concluded that cerium ions incorporation in small amount (0, 1 mol. %) contribute to a sintering process more than rather higher amount of copper ions (5 mol. %).
Physical and mechanical properties of composite materials in the MoSia2-SiC-TiB2 system
Authors: Perevislov S N , Markov M A , Motailo E S , Vikhman S V , Titov D D 
Published: May 2020

Abstract
In this work, we obtained ceramic materials based on MoSi2, hardened by SiC and TiB2 particles, which makes it possible to increase the heat resistance of the composite and increase the level of its physical and mechanical properties (at a relative density of more than 99, 0 %, tensile strength in bending 520 ± 10 MPa). The shrinkage, density, porosity and weight loss of composite materials during sintering were studied. The value of the ultimate strength in bending of materials at the optimum sintering temperature is determined. The maximum values of physical and mechanical properties are achieved for a material composition of 50, 0 vol. % MoSi2 + 15, 0 vol. % SiC + 35, 0 vol. % TiB2: E = 471 ± 10 GPa; σb = 520 ± 10 MPa, K1C = 4, 4 ± 0.1 MPa • m1/2; HV = 22.1 ± 0.1 GPa obtained at a sintering temperature of 1950 ° C.
Effect of sintering temperature on magnetic hysteresis characteristics of powder alloy Fe-30Cr-8Co (wt.%)
Authors: Ustyukhin A S , Zelensky V A , Milyaev I M , Ankudinov A B , Shustov V S 
Published: May 2020

Abstract
In this work, we studied the effect of sintering temperature (1100 - 1400 °C) and thermomagnetic treatment (TMT) on the magnetic hysteresis characteristics of the Fe-30Cr-8 Co alloy, obtained by powder technology. It has been shown that at sintering temperatures of 1200 °C and below, it is possible to obtain materials with high magnetic characteristics that ensure their technical application. Properties exceed the characteristics of analogues obtained by casting technology. In the range 1200 - 1250 °C, the largest increase in the density of samples is observed with an increase in sintering temperature with a simultaneous increase in the values of magnetic characteristics. It was revealed that the total duration of heat treatment for 40-80 hours is sufficient for the formation of the necessary structure that determines the magnetic properties of the material. Long-term heat treatment (up to 160 hours) contributes to a higher level of magnetic properties.
Magnetic properties of the Fe-24%Cr-15%Co-3%Mo-1.5%Ti hard magnetic alloy in anisotropic and isotropic states
Authors: Vompe T A , Milyaev I M 
Published: May 2020

Abstract
The magnetic properties of the Fe-24%Cr-15%Co-3%Mo-1.5%Ti (in wt. %) hard magnetic alloy in anisotropic and isotropic states after various heat treatments were studied. The alloy was prepared by the methods of powder metallurgy. The relative density was 98 %. The coefficient of thermal expansion of the alloy during heating and cooling was 17, 4*10 6 K−1 and 19, 0 *10− 6 K1 in the temperature range of 100 °C - 1300 °C. The kinetics of o-phase formation caused by an isothermal annealing at T = 750 ºC was investigated by means of the hardness measurements. The best magnetic properties of the alloy in anisotropic state were obtained after thermomagnetic treatment with cooling rate 200 ºC/h as Br = 1.22 T, Hc = 42.2 kAm-1 and (BH)max = 31.2 kJm- 3 and on the alloy in isotropic state with cooling rate 40 ºC/h.
Investigation of iron grains growth during solid-phase carbothermic reduction of red mud in the presence of iron metallic particles
Authors: Zakunov A S , Grudinsky P I , Zinoveev D V , Semenov A F , Panova M O , Dyubanov V G , Petelin A L 
Published: May 2020

Abstract
Red mud is a hazardous waste obtained from bauxite ore by the Bayer method. It has a high content of iron. In this study, the iron grain growth process during solid-phase carbothermic reduction of red mud in the presence of added iron metallic particles was investigated. Carbonyl iron, cast iron shots and metallurgical mill scale were used as the additives. The influence of amount and fraction of the additives on size of reduced iron grains obtained after reduction roasting of red mud at 1250-1350°C and 60-180 min duration was studied. It is showed that the best effect on size of iron grains has the addition of carbonyl iron and mill scale. In this way, besides red mud, some other iron-containing wastes can be recycled, e.g. mill scale.
Study of active media based on microparticles of solid-state laser materials
Authors: Burdukova O A , Konyshkin V A , Kopylov Yu L , Lopukhin K V , Petukhov V A , Senatsky Yu V , Zverev P G 
Published: May 2020

Abstract
Active media based on particles of solid-state laser materials distributed in liquid or gas may provide a new solution to the problem of heat removal from laser media. We propose active media based on particles of LiF crystal with F2 color centers, as well as of Nd3+-doped crystals and glasses. Mixtures of index-matched liquids with glass and crystal particles, methods of their preparation, and their optical characteristics are considered. The laser characteristics of the active media under excitation by nanosecond laser pulses are compared. A “slurry laser” based on a dense mixture of LiF:F2 microparticles with an index-matched liquid is demonstrated. Lasing was obtained in small neodymium pentaphosphate crystals (NdP5O14) and unpolished bulk pieces of concentrated neodymium phosphate glass in immersion liquids.
Ti-(15-25)Nb-5Ta Alloy Plate Hardness Research for Medical Applications
Authors: Konushkin S V , Sergienko K V , Baikin A S , Kolmakova A A , Berezina N V , Mikhailova A V , Morozova Y A , Balashov E P , Kolmakov A G , Sevostyanov M A 
Published: May 2020

Abstract
This work is devoted to the study of the hardness of various compositions of TiNbTa alloys for medical applications in the hip joints. This TiNbTa alloy system has a shape memory effect and superelasticity. The paper describes the technology for producing plates 1 mm thick of TiNbTa alloys. Carrying out thermal and mechanical treatments of these alloys. The effect of Nb doping on the structure and hardness of TiNbTa alloys is shown.
Study of the effect of the catalyst on the microstructure and film thickness of RTV siloxane
Authors: Tsareva A M , Nasakina E O , Balashov E P , Baikin A S , Konushkin S V , Sevost’yanov M A 
Published: May 2020

Abstract
An RTV grade siloxane film with a different percentage of catalyst was obtained. The microstructure of the surface of polymer films based on PTB grade siloxane was studied and the effect of the K-18 catalyst concentration on the thickness and microstructure of the obtained films was shown.
Synergetic flame retardant effect of bio-flame retardant based on oxidized wood in polyester’s compositions
Authors: Khvatov A V , Sakharov P A , Lomakin S M , Varfolomeev S D , Lukanina Yu K , Minikh A A , Frolov S M 
Published: May 2020

Abstract
Synthesized bio-flame retardants from plant materials. A comparative analysis of the flammability indices of polyester resin samples containing complex double flame retardants and single flame retardants of bioantipyrene, aluminum hydroxide and ammonium polyphosphate showed a non-additive improvement in flame retardant compositions consisting of double flame retardant compositions.
One dimensional constitutive model of isotropic magneto-sensitive rubber under shear deformation with amplitude, frequency and magnetic dependency
Authors: Wang B , Kari L 
Published: May 2020

Abstract
Modelling the amplitude, frequency and magnetic dependency of magneto-sensitive (MS) rubber in one dimensional case under shear deformation is proposed in this paper. MS rubber is a kind of smart materials which mainly consists of magnetizable particles and rubber matrix. The modulus of MS rubber changes rapidly after the applying of magnetic field which is referred as the magnetic dependency of MS rubber. Besides the magnetic dependency, there is an amplitude and frequency dependency of MS rubber. Specifically, the shear modulus of MS rubber under larger strain magnitude is smaller than the corresponding modulus under small strain and the shear modulus of MS rubber increases with increasing of frequency. A one-dimensional constitutive model consists of a fractional derivative element in parallel with a nonlinear kinematic elastoplastic model to depict the amplitude, frequency and magnetic dependency of MS rubber is developed in this paper. After comparison with the test result, it found that with eight parameters the amplitude, frequency and magnetic dependency can be depict precisely by the model developed. It is helpful for the predicting the dynamic behaviours of MS rubber-based vibration devices in the design phase and promotes MS rubber’s application in sound and vibration area.
Functionalised Composite Materials for the Inflatable Modular System Accomplishment Used as Decoy for the Instruction and Training Maritime Applications
Authors: Mihai C , Ene A G 
Published: May 2020

Abstract
The inflatable modular systems are currently used in training and instruction specific to maritime applications. The main requirements imposed to this kind of systems are represented by: water and air impermeability; high resistance to the UV radiation action, to hydrolysis and to abrasion; resistance both to chemicals contained in seawater, and to the action of microorganisms, bacteria, mildews etc. For the accomplishment of the modular system was develop a composite material having the following physical and mechanical characteristics: mass: 173 gsqm
−1; breaking resistance: min.72 daN5cm
−1 (for both systems); breaking elongation: min. 40% for weft and warp; air permeability: 0 cfm, resistance to water penetration: 1000 mm H
2O col. The floating target was designed considering the minimum requirements imposed to the system, regarding the maximum tension of the basic supports that must not exceed the allowed tension, for the wind speeds of 31 ms
−1, a sea agitation of 7 bf. The experimental programme performed in collaboration with the maritime authorities demonstrated that the inflatable modular system has the dimensional, gravimetric and functional characteristics that correspond to the requirements imposed by the final application.
Effect of Substrate Thickness on Horizontal Magnetoresistance
Authors: Phetchakul T. , Chemthung Y. , Poyai A. 
Published: May 2020

Abstract
This paper presents the effect of substrate thickness on horizontal magnetoresistance that detects the horizontal magnetic field perpendicular to bulk cross section area. The substrate thickness (T) concerns directly to the current density distribution and the effective depth (t) of current path corresponding to cross section area of current. The horizontal magnetoresistance depends on current distribution which concerns with substrate concentration, length, width and thickness of resistor. It changes by the effective depth of current path change by the unbalance between Lorentz’s force and Hall electrical force in vertical direction. From this study, the sensitivity of device increases with the thickness of substrate up to critical substrate thickness and still constant for thickness greater than this critical value. The current distribution is limited when substrate thickness less than a critical value and fully distributes when the thickness is greater than this value. At the same constant current, the longer length of resistor shows the lower current density which needs the longer effective depth of current which causes the critical substrate thickness to be increased accordingly.
Review of Road Materials Self-healing: Problems and Perspective
Authors: Inozemtcev Sergey , Korolev Evgeniy 
Published: May 2020

AbstractMaterials with the ability to restore their own functionality are a promising type of smart materials for road construction. The use of encapsulated functional modifiers is a common solution aimed at implementing self-healing technology. The paper presents general trends in the development of self-healing technology in the field of road materials. A mathematical interpretation of the destruction model of self-healing materials is proposed. The direction of technology development is proposed for the formulation of general requirements and quality indicators of self-healing materials for construction, characterizing the degree of their effectiveness depending on the conditions of use.
A Model for FGM/SMA Bilayer Beams Accounting for Asymmetric SMA Behavior
Authors: Zaki W , Viet N V 
Published: May 2020

Abstract
A new model is proposed for bilayer cantilever beams consisting of shape memory alloy (SMA) and functionally graded material (FGM) layers and subjected to loading at the tip. The model accounts for tensile-compressive SMA behavior through the use of an appropriate set of constitutive relations and considers the deformation of the beam within the frame of the Timoshenko beam theory. The derivation of the model proceeds by first determining the correct sequence in which different solid phase structures develop within the SMA layer as the load is applied, resulting in the formation of distinct solid phase regions. The boundaries separating these regions are then located and used in deriving appropriate moment and shear force equations throughout a complete loading-unloading cycle. The model is capable of tracking the deviation of the neutral surface with respect to the mid-plane and the distribution of martensite in the beam as the load varies. The nonlinear variation of stress and strain in a cross section of the beam is also considered. Results of beam deflection and neutral surface deviation are presented and validated against finite element simulations of a 3D model of a beam consisting of a Nitinol and CNT-reinforced layers.
The effect of processing in a SHF electromagnetic field on the moisture absorption of cured polymer composite materials
Authors: Zlobina I V , Bekrenev N V , Katsuba I S 
Published: May 2020

Abstract
Comparative studies of moisture absorption by cured polymer composite materials (PCM) under conditions of being in a climate chamber for 7 days, previously subjected to short-term exposure to a SHF electromagnetic field with a frequency of 2.45 GHz, have been performed. It has been found that processing with an energy flux density (17-18) x104 mW/cm2 for 2 minutes contributes to a significant decrease in moisture absorption, which is expressed in a decrease in weight change after the presence of carbon fiber and fiberglass prototypes in the chamber compared with control samples by 16.7 and 25%, respectively. The reason for this result, determined on the basis of microstructure analysis, presumably lies in the reduction of the pore size and the increase in the relief of agglomerates, which increases the resistance to liquid penetration. Taking into account the previously established positive effect on improving the strength of PCM processed in a SHF electromagnetic field, the results obtained confirm the feasibility of using this method as a finishing technological operation in the production of PCM products.