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Influence of Rolling and Annealing Modes on Properties of Sheet Semifinished Products Made of Wrought Aluminum Alloy 1580 Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 I. L. Konstantinov, V. N. Baranov, S. B. Sidelnikov, E. Yu. Zenkin, P. O. Yuryev, I. N. Belokonova
Abstract This article analyzes the processability and properties of sheet products made of a large grade 1580 alloy ingot with a lower scandium content in the range of its specifications. The processability of the ingot upon hot and cold rolling are estimated and the influence of percent reduction and annealing modes on properties of cold-rolled semifinished products from the alloy under consideration
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Effect of Sodium Silicate Concentration on Morphology of Ceramic Coatings Produced on Commercially Pure Aluminum Using Plasma Electrolytic Oxidation Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 M. Khorasanian, F. Shamsi, S. M. Lari Baghal
Abstract Microstructure of ceramic coatings formed on commercially pure aluminum by plasma electrolytic oxidation using different amounts of sodium silicate was studied. Analysis of chemical composition and microhardness measurements of the coatings were carried out to characterize the morphology of the coatings. The addition of sodium silicate (1–3 g/L) increased the thickness about 8 orders of magnitude
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The Possibility of Dense Materials Based on Obtaining an AlN–SiC Solid Solution by Self-Propagating High-Temperature Synthesis Gasostating Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 T. G. Akopdzhanyan, E. A. Chemagina, I. P. Borovinskaya
Abstract The synthesis and sintering of the (AlN)x(SiC)1 – x solid solution have been studied under conditions of self-propagating high-temperature synthesis (SHS) gasostating at high nitrogen gas pressures (up to 110 MPa). The phase formation during the combustion of mixtures of aluminum and silicon carbide with a different amount of Al (from 35 to 60 wt %) is studied. It is shown that the optimal
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Synthesis of Aluminum Alloys from Dispersed Waste Based on Aluminum Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 V. I. Nikitin, K. V. Nikitin, I. Yu. Timoshkin, R. M. Biktimirov
Abstract This paper presents the results of research on the synthesis of aluminum alloys of the Al–Si–Mg (Ak7ch), Al–Si–Mn (AK12), Al–Si–Cu–Mg (AK6M2), and Al–Mg–Mn (AMg5) systems using dispersed waste: beverage cans (Al–Mn–Mg system), sawdust of a cast alloy (Al–Si–Mg system), and twisted chips of deformable alloys of the Al–Cu–Mg and Al–Mg–Mn systems. A study of the microstructure of waste in the
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Studying the Influence of Radial-Shear Rolling on Thermal Deformation Conditions of A1050 Processing Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 Yu. V. Gamin, A. N. Koshmin, A. P. Dolbachev, S. P. Galkin, A. S. Aleschenko, M. V. Kadach
Abstract The analysis of the influence exerted by the deformation techniques on the conditions of radial-shear rolling (RSR) of commercial purity aluminum A1050 is carried out. Based on finite-element modeling (FEM), the temperature change at various feed angles and elongation in the first and last passes is obtained. The increase in feed angle slightly raises the temperature variations in the surface
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Experimental and Computational Determination of the Wear Resistant Coefficient for Coatings with Nanodispersed Carbide Particles Added by Laser Surfacing Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 V. P. Biryukov, T. A. Bazlova
The results of domestic and foreign investigations into the laser surfacing of coatings containing a strengthening carbide phase, as well as metallographic and tribological investigations of coatings by alloy powders of the Ni–Cr–B–Si system, including the addition of nanodispersed titanium and tungsten carbide particles, are presented. Values of the wear resistance coefficient (Kw) of coatings during
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Structure, Properties, and Oxidation Resistance of Prospective HfB 2 –SiC Based Ceramics Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 Yu. S. Pogozhev, A. Yu. Potanin, S. I. Rupasov, E. A. Levashov, V. A. Volkova, V. P. Tashev, A. N. Timofeev
Abstract This work is devoted to the fabrication of heterophase powdered and sintered ceramics based on the hafnium diboride and silicon carbide by means of self-propagating high-temperature synthesis (SHS) and hot pressing (HP). The structure of SHS-powders consists of hafnium diboride grains and agglomerated polyhedral 2–6 μm silicon carbide grains. The produced composite powders are characterized
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Short Fluoride Cycle in Tungsten Technology Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 Yu. M. Korolev, A. N. Timofeev
Abstract It is found that when a tungsten anode is electrochemically dissolved in a acidic fluorides of alkali metals (K,Na)H2F3 and hydrogen fluoride at a temperature of t ~ 37°C, the resulting atomic fluorine reacts completely with tungsten to form WF6. The latter dissolves in the melt, forming complex compounds (K,Na)2WF8 and (K,Na)WF7, which is accompanied by an increase in the melting point of
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Investigation of the Processes of the Formation of a Nonequilibrium Phase-Structural State in FeTiB Films Obtained by Magnetron Sputtering Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 E. N. Sheftel, V. A. Tedzhetov, Ph. V. Kiryukhantsev-Korneev, E. V. Harin, G. Sh. Usmanova, O. M. Zhigalina
Abstract The main trends in the modern development of magnetic microelectronics are miniaturization and operation speed, while ensuring efficient operation in the MHz and GHz frequency ranges of magnetic fields. Creating new magnetic materials characterized by properties providing these trends is the most important fundamental and applied problem of materials science. In this regard, nanocrystalline
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Self-Propagating High-Temperature Synthesis of Silicon Carbide Nanofibers Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 V. V. Zakorzhevsky, V. E. Loryan, T. G. Akopdzhanyan
The results of investigations into the organization of the synthesis of silicon carbide fibers in the gas phase using silicon powder, an energy additive of polytetrafluoroethylene (PTFE), and polyethylene (PE) powder by self-propagating high-temperature synthesis (SHS) are presented. Mixtures of the stoichiometric composition are used for experiments. Charge components are mixed in a drum with 3 L
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Synthesis of Porous Composite Material with the Combustion of Titanium and Boron Powders and Nickel-Clad Aluminum Granules Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 M. A. Ponomarev, V. E. Loryan
Self-propagating high-temperature synthesis (SHS) in the Ni–Al–Ti–B system has been carried out. The aim of the study is to obtain, in one process step, a composite material with a ceramic and intermetallic framework and a developed porous structure in combustion mode from the boron–titanium–large nickel-clad aluminum granules powder system pressed by successive batch compaction method. The synthesis
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Chemical Composition and Structure of Interfacial Boundaries in Cr 3 C 2 –Ti Powder Hard Alloys after Explosive Compaction and Subsequent Heating Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 A. V. Krokhalev, V. O. Kharlamov, S. V. Kuzmin, V. I. Lysak
The results of studying the fine structure, chemical composition, and phase composition of boundaries between components of the Cr3C2–Ti hard alloy containing 40 wt % titanium binder in the state after the explosion compaction, as well as after heat treatment, are presented. The heating temperature of the powder mixture during the shock-wave loading is 730°C and the pressure is 14 GPa, which provides
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Optimization of Characteristics of Pyrolytic Chromium Carbide Coatings Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 N. N. Schitov, A. A. Lozovan
Abstract The optimization of characteristics of pyrolytic chromium carbide coatings (PCCCs) for various fields of industry is discussed. The scope of PCCC application involves the protection of the surface of various details and units made from different materials against corrosion, sticking, high temperatures, and various types of wear. Such versatility of PCCCs is caused in particular by their structural
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Magnetic Structure and Nanomechanical Properties of Sintered Permanent Magnets Nd–Dy–Fe–B USC-20L Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 I. V. Slinkin, O. A. Chikova
Abstract Using scanning electron microscopy (EDS analysis), magnetic force microscopy, and nanoindentation, a metallographic study of the magnetic structure and nanomechanical properties of sintered rare-earth magnets Nd–Dy–Fe–B of the USC-20L brand has been carried out (Ural Strip Casting Technology). The microstructure of the sintered Nd–Dy–Fe–B magnet of the USC-20L grade includes the following
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Synthesis of Inorganic Cobalt-Containing Spinel-Type Pigments by Self-Propagating Synthesis Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 N. I. Radishevskaya, A. Yu. Nazarova, O. V. Lvov, N. G. Kasatsky
Cobalt-containing ultramarine spinel-type pigments are fabricated in the ZnO–MgO–CoO–Al(OH)3–Al system by self-propagating high-temperature synthesis (SHS). the initial components are oxides of cobalt (Co3O4) and zinc (ZnO), aluminum hydroxide (Al(OH)3), and magnesium nitrate hexahydrate (Mg(NO3)2 · 6H2O). An aluminum powder of the ASD-4 brand is used as the reducer metal. The synthesis is performed
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Positron Annihilation Studies of Modified Aluminide Coatings on Nickel and Nickel Superalloy Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 Ewa Dryzek, Jolanta Romanowska, Konrad Skowron
Abstract Aluminide coatings deposited by CVD method on CMSX-4 superalloy, modified by palladium and zirconium or hafnium as well as non-modified and palladium modified ones on pure nickel have been studied using positron annihilation spectroscopy. The positron lifetime values and the positron effective diffusion length in the coatings studied point out trapping of positrons in defects associated with
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Synthesis Features, Structure, and Properties of Promising High-Temperature Ceramics in the Hf–Ta–B–Ti–Si System Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 V. V. Kurbatkina, E. I. Patsera, D. V. Smirnov, E. A. Levashov
This study covers the elemental synthesis features of Hf–Ta–B–Ti–Si ceramic materials used to obtain promising high-temperature ceramics and analyze its structure and properties. The macrokinetics of self-propagating high-temperature synthesis (SHS) are studied. Combustion temperature and velocity as a function of initial temperature are plotted. It is established that chemical interactions occurring
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Mechanical Properties and Heat Resistance of Ta–Zr–Si–B–C–N Coatings Obtained upon the Magnetron Sputtering of the TaZrSiB Target in Ar, N 2 , and C 2 H 4 Atmosphere Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 Ph. V. Kiryukhantsev-Korneev, A. D. Sytchenko, E. A. Levashov, T. A. Lobova
Ta–Zr–Si–B–C–N coatings are obtained by magnetron sputtering in argon, nitrogen, and ethylene atmosphere. The structure of the coatings is analyzed by scanning electron microscopy and energy dispersive and X-ray phase analysis. The mechanical properties of the coatings are determined by nanoindentation. Tribological tests are performed using a Tribometer automated testing machine under a load of 1
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Effect of Rolling Process on Microstructures and Mechanical Properties of High Strain-Rate Rolled ZK60 Magnesium Alloy Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 Xvhui Feng, Youping Sun, Xvhuang Feng, Jiangmei He, Siyu Wan
A high strain-rate rolling (HSRR) process was successfully used to produce a ZK60 magnesium alloy sheet with a strength-toughness balance. In one-pass rolling, as the rolling rate increases, the edge cracking of the sheets decreases and the grain size increases continuously, and the grain size ranges from 1.4 μm at 5 s–1 to 4.2 μm at 25 s–1. When the strain rate is 5 s–1, the tensile strength and elongation
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Synthesis of Nanoporous Ceramic Materials for the Filtration of Liquids and Gases by the Technological Combustion Method Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-12-28 M. I. Alymov, V. I. Uvarov, R. D. Kapustin, A. O. Kirillov, V. E. Loryan
Experimental and analytical investigations into the synthesis of the ceramic material based on the Ti–Al system with a nanodimensional porous structure are performed. The results of previous studies of the collective of authors show that it is reasonable to produce porous ceramic materials intended to filtrate liquids and gases in the thermal explosion mode (over the entire sample bulk) rather than
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Copper Deposition from Its Sulfate Solution onto Titanium Powder with the Simultaneous Mechanical Activation of the Mixture Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 S. G. Vadchenko, E. V. Suvorova, N. I. Mukhina, I. D. Kovalev
Abstract To fabricate Cu–Ti composite particles, the method of copper deposition from its sulfate solution on titanium powder particles with the simultaneous mechanical activation (MA) of the mixture in an AGO‑2 planetary ball mill for 5 min is used. The CuSO4 ⋅ 5H2O concentration in solutions is 10 and 16%, which provides molar ratio Cu/Ti = 0.85 and 1.36, respectively, with the complete reduction
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Gold Cementation Kinetic Features Using Dendritic Zinc Powders Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 K. D. Naumov, V. G. Lobanov, E. B. Kolmachikhina
Abstract Gold cementation kinetic features from cyanide solutions using zinc powders of various origins were studied. The first powder was obtained by distillation and is currently used in the vast majority of industries (traditional powder). The second powder was obtained by electrochemical reduction from alkaline solution (electrolytic powder). The main distinguishing feature of these powders is
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Preparation of Ti 2 AlC and Ti 3 AlC 2 MAX Phases by Self-Propagating High-Temperature Synthesis with the Reduction Stage Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 V. I. Vershinnikov, D. Yu. Kovalev
Abstract This work is devoted to the preparation of powders of Ti2AlC and Ti3AlC2 MAX phases by self-propagating high-temperature synthesis (SHS) using the magnesium-thermal reduction from oxide feedstock. Oxide TiO2 is used as the titanium source, and magnesium is used as the reducing agent. Purification with the removal of magnesium oxide is performed in diluted hydrochloric acid at a temperature
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Properties of the Surface Layer after High-Energy Treatment by Powder Particles Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 E. V. Petrov, I. V. Saikov, G. R. Saikova, V. S. Trofimov
Abstract Experiments on the high-energy surface treatment of a substrate made of St.3 structural steel by the flow of particles of tungsten, nickel, and titanium nitride particles are performed. The collision pressure of the particles accelerated by the explosion energy on a steel target is evaluated using the momentum conservation equation and linear equation of the impact adiabat of the particle
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Investigation into the Influence of Sodium Lignosulfonate, Anionic Surfactants, and Their Mixtures on the Copper Cementation Rate by Zinc Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 E. B. Kolmachikhina, A.V. Sviridov, K. D. Naumov
Abstract This article is devoted to the influence of sodium lignosulfonate (SL), anionic surfactants (sodium dodecylsulfate (SDS), sodium dodecylbenzene sulfonate (SDBS)), and their mixtures on the copper cementation rate by zinc. The results demonstrated a copper cementation rate decreasing at LS and SDBS concentrations increasing. Excessive zinc consumption was also detected on copper-ion cementation
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Determination of the Growth Time Period of Loose Zinc Deposit Using Interval Analysis Methods Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 V. S. Nikitin, T. N. Ostanina, S. I. Kumkov, V. M. Rudoy, N. I. Ostanin
Abstract A characteristic of obtaining metal powders by direct current electrolysis is changes in the morphology of particles over the loose deposit layer thickness up to the formation of large spherulites. Deposits should be periodically removed from the cathode in order to obtain a powder with homogeneous composition. This paper justifies the choice of the parameter describing the change in loose
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Nanoscale Nickel-Containing Powders for Use in CO and NO 2 Gas Sensors Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 M. V. Kuznetsov, A. V. Safonov, D. A. Bobreshov, O. V. Belousova, Iu. G. Morozov
Abstract This paper investigates the physicochemical characteristics and gas-sensitivity mechanisms of nickel oxide (NiO) and nickel ferrite (NiFe2O4) obtained by levitation-jet synthesis LJS). Properties of synthesized materials were examined using various spectroscopic methods. XPS showed that the presence of Ni3+ ions in samples reduced significantly with an increase in the specific surface area
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Features of Synthesizing Ceramic Composites Discretely Reinforced by Carbon Fibers and SiC Nanowires Formed in situ in the Combustion Wave Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 S. Vorotilo, E. A. Levashov, A. Yu. Potanin, P. A. Loginov, N. V. Shvyndina
Abstract A new method is proposed for the engineering of SiC-based ceramic-matrix composite materials strengthened by discrete carbon fibers and single-crystal silicon carbide nanowires. Depending on the macrokinetic characteristics of the combustion process, either diffusion layers, particles of silicon carbide, or silicon carbide nanowires with a diameter of 10–50 nm and a length of 15–20 μm can
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The Microstructure, Texture and Mechanical Properties of Friction Stir Welded Aluminum Alloy Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 Saliha Gachi, Mouloud Aissani, Thierry Baudin, Anne.Laure Helbert, François Brisset, Sébastien Gautrot, Marie-Hélène Mathon, Djamel Bradai, Fouad Boubenider
Abstract The microstructure and texture of 7075-T6 FSW weld with optimal parameters are investigated using optical microscopy, electron back scatter diffraction and neutron diffraction. The mechanical properties are characterized through microhardness, nanoindentation and ultrasonic tests. The friction stir welding is performed at a nominal rotational speed of 1400 rpm and a traverse speed of 60 mm/min
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Microstructure and Wear Properties of Hot-Pressed NiCrBSi/TiC Composite Materials Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 S. Islak, M. Ulutan, S. Buytoz
Abstract In this study, TiC-reinforced NiCrBSi matrix composite materials were produced using the hot pressing powder metallurgy (PM) technique. The effect of the addition of titanium carbide to NiCrBSi powder in different proportions (5, 10, and 20 wt %) on the microstructure, hardness, relative density, and wear properties of composites was investigated experimentally. NiCrBSi–TiC composites were
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Comparative Analysis of Structure and Mechanical Properties of Additive Objects Manufactured by Electron Beam Method and Cold Metal Transfer Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 A. A. Eliseev, V. R. Utyaganova, A. V. Vorontsov, V. V. Ivanov, V. E. Rubtsov, E. A. Kolubaev
Abstract Nowadays prototyping and additive manufacturing of objects are the most promising trends of development. As opposed to more precise powder methods, particular attention has been given to faster wire techniques, which allow manufacturing of objects without pores. This work compares the influence of two wire techniques, electron beam additive manufacturing and cold metal transfer, on the structure
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Thermodynamic Analysis of Zinc Sulfide Dissolution Stoichiometry in Sulfuric Acid Solution with Oxygen Participation Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 G. V. Solovyeva, E. B. Kolmachikhina, S. V. Mamyachenkov
Abstract In this work, a thermodynamic study of zinc sulfide high temperature oxidative leaching was carried out. At the metals sulfides dissolution under oxidants action in acidic solutions several simultaneously proceeding reactions are possible. With the aim finding the proportion of potential reactions, a thermodynamic calculation was carried out using stoichiometric equations with equal oxidant
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Using Metal-Sprayed Coatings to Protect Submersible Electric Pump Motors from the Impact of Complicating Factors in Oil Wells Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 Zh. V. Knyazeva, P. E. Yudin, S. S. Petrov, A. V. Maksimuk
This paper presents an overview of the results of the application of metal-sprayed coatings to protect the outer surface of electric submersible pumps (ESP) from the effects of complicating factors in oil wells. The metal-sprayed coating is applied using hot spraying, and the choice of the method is based on the chemical composition, the materials that are used, and the properties of the finished coating
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Using Different Powdered Carbon Forms for Reinforcing Aluminum Composite Materials with Carbon and Titanium Carbide: A Review Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-10-21 A. P. Amosov, A. R. Luts, A. D. Rybakov, E. I. Latukhin
Abstract The use of both traditional powdered carbon materials (graphite, soot, charcoal, and shungite) and novel carbon nanomaterials (nanodiamonds, fullerene, nanotubes, and graphene) as a dispersed reinforcing phase in aluminum matrix composites (AMCs) and as reagents for the synthesis of reinforcing particles of titanium carbide (TiC) in AMCs is considered. It is noted that the main direction of
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Influence of Ti and TiH 2 Additives on the Structure and Properties of Copper Alloys for Diamond Cutting Tools Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 P. A. Loginov; S. Vorotilo; D. A. Sidorenko; Yu. V. Lopatina; A. Okubayev; N. V. Shvyndina; E. A. Levashov
AbstractThe influence of titanium and titanium hydride additives on the structure, mechanical properties, and wear resistance of copper alloys intended for use as a binder of the diamond cutting tool is investigated. Powder mixtures Cu–Ti and Cu–TiH2 are fabricated by mechanical alloying in a planetary centrifugal mill. Such treatment makes it possible to form single-phased powders of the copper-based
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Study of the Change in the Structure and Properties of High-Entropic Alloys during Thermal and Thermomechanical Processing Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 G. R. Aripov; A. I. Bazlov; A. Yu. Churyumov; V. I. Polkin; D. V. Luzgin; S. D. Prokoshkin
AbstractMulticomponent alloys without a base element, also known as highly entropic alloys (HEAs), are of great interest for research. The microstructure of the Fe20Ni20Co20Cu20Al20 alloy in a cast, annealed, and deformed state, as well as its mechanical properties and hot deformation ability, is investigated in this article. This alloy is a typical representative of the high-entropy alloy family.
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Comparison of Morphological and Structural Characteristics of Nanopowder Particles Fabricated by Grinding Natural Diamond and Detonation Synthesis Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 P. P. Sharin; A. V. Sivtseva; S. P. Yakovleva; M. M. Kopyrin; S. A. Kuzmin; V. I. Popov; L. A. Nikiforov
Specific features of the morphological and structural characteristics of nanopowder particles fabricated by grinding bulk natural diamond and by detonation synthesis are investigated. It is shown by high-resolution transmission electron microscopy, scanning electron microscopy, and low-angle X-ray scattering that, in contrast with the detonation synthesis nanopowder, which consists of similar in size
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Centrifugal Metallothermic SHS of Cast Co–Cr–Fe–Ni–Mn–(Х) Alloys Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 V. N. Sanin; D. M. Ikornikov; O. A. Golosova; D. E. Andreev; V. I. Yukhvid
AbstractA relatively new approach to obtaining metal materials containing several principal elements in equiatomic concentrations which look promising for replacing commercially used alloys is proposed. Such materials are called high-entropy alloys (HEAs). Studies show that HEAs tend to form a simple solid-solution structure and can also contain ordered intermetallic phases. Such a method of forming
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Experimental Studies on the Stress-Strain State under Drawing Aluminum–Copper Bimetal Parts Rectangular in Plan Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 T. V. Haikova; R. H. Puzyr; R. V. Levchenko
AbstractThe stress-strain state has been studied for a flange of a semiproduct made of an aluminum–copper bimetal under drawing boxes rectangular in plan. These studies are carried out using a grid method, assuming that the material is isotropic and incompressible; the deformation within each cell is uniform; the deformation occurs monotonically; and the stressed state is plane and the deformed state
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Structural Features of High-Entropy HfTaTiNbZr Alloy Fabricated by High-Energy Ball Milling Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 A. S. Sedegov; V. S. Tsybulin; K. V. Kuskov; N. F. Shkodich; D. O. Moskovskikh
AbstractThe HfTaTiNbZr high-entropy alloy (HEA) of equimolar concentration is fabricated from powder components by high-energy ball milling (HEBM) and spark plasma sintering (SPS). The treatment of the initial powders was performed in a planetary high-energy ball mill for 20, 40, 60, and 90 min. It is shown based on the studied surface morphology, microstructure, and phase composition of HEA samples
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Influence of Copper Additives on Heat Capacity and Thermodynamic Functions of A7E Brand Aluminum Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 I. N. Ganiev; A. R. Rashidov; H. O. Odinazoda; A. G. Safarov; J. H. Jayloev
AbstractThe economic feasibility of applying aluminum as a conductor is explained by the favorable ratio of its cost (which has remained almost constant for many years) to the cost of copper. When using conducting aluminum alloys to fabricate thin wire, winding wire, etc., some difficulties can appear in connection with their insufficient strength and small number of kinks before fracture. In recent
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Nickel Effect on the Structure and Properties of Adaptive Wear-Resistant Arc-PVD Ti–Al–Mo–N Coatings Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 V. S. Sergevnin; I. V. Blinkov; A. O. Volkhonskii; D. S. Belov
Comparative investigations of the structural characteristics and functional properties of Ti–Al–Mo–N and Ti–Al–Mo–Ni–N coatings fabricated by the ion-plasma-vacuum-arc deposition (arc-PVD) method are performed to study the influence of nanostructuring nickel additives. Coatings have a multilayered architecture with alternating layers of titanium and molybdenum nitrides. The molybdenum concentration
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Formation Kinetics of the Dielectric Coatings on Iron Powders for the Fabrication of Soft Magnetic Composite Materials Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-09-03 B. G. Gasanov; V. G. Tamadaev; V. O. Bogachev; E. R. Makhmudova
The topicality and efficiency of applying a silicate-containing inorganic coating as an electric insulator when producing soft magnetic composite materials (SMCMs) from iron powders are substantiated. The influence of the sodium silicate (Na2O–SiO2) concentration in an aqueous solution on the formation kinetics of the dielectric coating on iron powders of various brands is shown as well as on their
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Investigating the Possibility of Fabricating Pr 2 Fe 14 B/α-Fe Composite Materials by Oxidation of the Pr–Fe–B Alloy in a Fluidized-Bed Jet Mill Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 V. P. Tarasov; O. N. Krivolapova; A. V. Kutepov; E. S. Gorelikov
The results of studying the possibility of fabricating the Pr2Fe14B/α-Fe composite materials by oxidation of the Pr–Fe–B alloy in a fluidized-bed jet mill are presented. It is shown that the use of the standard powder metallurgy technology supplemented by oxidation of the Pr–Fe–B alloy in a fluidized-bed jet mill for rare-earth magnetically hard materials (MHMs) makes it possible to fabricate Pr2Fe14B/α-Fe
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Aluminum Alloy Matrix Composite Reinforced with Metallic Glasses Particles Using Hot-Roll Bonding Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 A. D. Kotov; A. V. Mikhaylovskaya; A. G. Mochugovskiy; S. V. Medvedeva; A. I. Bazlov
AbstractComposite materials (CMs) exhibit high hardness, mechanical strength, and wear resistance, but their processing properties are limited. The most popular reinforcements for composites are carbides, nitrides, and oxides. Amorphous metallic materials are an alternative reinforced component. Metallic glass can provide increased properties due to higher interphase strength between their particles
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Alumina Extraction from Kaolinite via Calcification-Carbonation Process Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 Zimu Zhang; Guozhi Lu; Yongchao Chen; Tingan Zhang; Xi Chao; Yang Chen; Yanxiu Wang; Yan Liu
AbstractThe rapid development of the alumina industry in China has led to the depletion of high-quality bauxite resources. The proposed calcification-carbonation method (CCM) can convert the middle silicon of bauxite into CaO · SiO2 and CaCO3, thus enabling clean and efficient utilization of low-grade resources. Since kaolinite is the main silicon-bearing mineral in low-grade bauxite, the transformation
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Tribological Characteristics and Corrosion Resistance of Coatings Obtained by Electrospark Alloying, Pulsed Cathodic Arc Evaporation, and Hybrid Technology Using TiCNiCr and TiCNiCr–Dy 2 O 3 Electrodes Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 A. D. Sytchenko; A. N. Sheveyko; E. A. Levashov; Ph. V. Kiryukhantsev-Korneev
AbstractSingle- and double-layer coatings on 40Cr steel substrates have been obtained by electrospark alloying (ESA) and a combination of ESA technology and pulsed cathodic arc evaporation (PCAE) using TiCNiCr and TiCNiCr–Dy2O3 electrodes. The electrodes are obtained by powder metallurgy. The structure and elemental and phase composition of the electrodes and coatings are studied using scanning electron
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Characterization of Tantalum–Titanium Powders with Universal Powder Bed (UPB) System for Electron Beam Melting Process Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 Ahu Celebi; Stefan Gulizia; Christian Doblin; Darren Fraser; Leon Prentice
Electron beam melting (EBM) is a powder bed fusion additive manufacturing (AM) technique that produces three-dimensional (3D) parts by fusing metallic powders with a high-energy electron beam. Powder has been major issue for the properties of the final parts. Hence, establishing the effect of powder properties on the final product properties is important for producing parts of quality. In this study
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Simulation of the Creep Strain of Carbon-Based Cathode Material in the Aluminum Electrolysis Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 Wei Wang; Kai Sun
AbstractDifferent stresses can occur in the carbon cathodes due to melting and penetration of sodium during aluminum electrolysis. Under high temperatures and elevated stress, carbon blocks experience primary creep, which can be extended to the secondary and tertiary creep stages. It is quite necessary to characterize the creep behavior of carbon cathodes. Therefore, uniaxial compressive creep testing
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Influence of Sodium Microalloying on Rolling Contact Endurance and Mechanical Properties of Hot-Deformed Powder Steels Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 V. Yu. Dorofeyev; A. N. Sviridova; L. I. Svistun
Rolling bearing rings comprise a large reserve for expanding powder metallurgy production. This reserve is being incompletely implemented. The hot forging of porous preforms makes it possible to produce high-density materials for the fabrication heavy loaded wares, in particular, rolling bearing rings. The problem of fabricating hot-forged bearing rings is associated with the presence of a large amount
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Preparation and Study of Ni–Al–O System Cermet Composites with a Small Addition of MgAl 2 O 4 Nanoparticles Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 L. E. Agureev; V. I. Kostikov; I. N. Laptev; A. I. Kanushkin; Zh. V. Eremeeva; A. V. Ivanov; A. A. Ashmarin; E. A. Vysotina; B. S. Ivanov
This paper presents the results of obtaining and studying the structure and properties of cermets based on powders of aluminum oxide and nickel–aluminum alloy doped with 0.1 wt % of aluminum–magnesium spinel nanoparticles sintered by the electrospark method on a FCT-HP D 25 unit in argon at t = 1470°C for 30 min. The results of the NiAl–65Al2O3 charge TG and DSC analysis at up to 1300°C are presented
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Composition and Crystalline Structure of Ternary Phases in the Ta–Ni–Al System Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 A. S. Shchukin; S. V. Konovalikhin; D. Yu. Kovalev; A. E. Sytschev
AbstractThe composition and crystal structure of compounds produced by self-propagating high-temperature synthesis (SHS) from the 5Ta–2Ni–3Al (at %) powder mixture followed by vacuum remelting at 3000°C are studied. The SHS product contains the following phases: TaNiAl (Laves τ1 phase), NiAl, Ni2Al3, and Ta. Its microstructure includes Ta85Ni7Al8, Ta52Ni20Al28, and Ta53Ni25Al22 ternary phases according
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Hereditary Effect of the Structure of the Charge on Density, Gas Content, and Processes of Solidification of an Al–Si–Cu Alloy System Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 K. V. Nikitin; V. I. Nikitin; I. Yu. Timoshkin
AbstractThe effect of the structure of the initial charge density in liquid and solid states, as well as on the temperature–time parameters of the process of solidification of the AK6M2 alloy (Al–6% Si–2% Cu), is shown. To obtain a coarse-crystal charge (C charge), part of the melt is crystallized in ceramic forms in a sand backfill with a cooling rate of ~0.5–1.0°C/s. The fine-crystal charge (F charge)
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The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 K. M. Em Akra; M. Akkaş; M. Boz; E. Seabra
AbstractThe aim of this study is to investigate the AZ31 alloy powder production and characterization processes experimentally using the gas atomization method. For this purpose, firstly, the design and production of gas atomization units were done at Karabük University Faculty of Technology Department of Manufacturing Engineering. In this gas atomization unit, the manufacturability of AZ31 powder
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Technology of Gold Extraction from Mature Dumps by Thiourea Leaching Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 I. R. Boboev; R. S. Selnitsin; T. A. Kholikov; B. K. Sharipov
AbstractTajikistan has a large volume of gold-containing dumps, which on conversion to gold equals ~18 t. These dumps are products of amalgamation and cyanidation processes, resulting from treating the ores from Tarorskoe, one of the largest deposits in Tajikistan, and from a few other nearby deposits: Dzhilau, Khirskhon, and Olimpiiskoe. The mineralogical composition of the dumps is represented primarily
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Effects of Titanium Nitride Particles on Copper Matrix-Graphite Composite Properties Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 Yu-nan Tian; Zhi-he Dou; Li-ping Niu; Ting-an Zhang
In this paper, a new type of copper (Cu) matrix graphite composite was successfully prepared, which was reinforced with titanium nitride particles (TNPs) using powder metallurgy. These composites contained 2 wt % graphite as the lubricating phase and 1, 3, 5, 10, and 15 wt % TNPs as the reinforcing phase. The effects of different TNP contents on composite properties and the composites' wear mechanism
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Nanostructured Gradient Material Based on the Cu–Cr–W Pseudoalloy Fabricated by High-Energy Ball Milling and Spark Plasma Sintering Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 N. F. Shkodich; Yu. S. Vergunova; K. V. Kuskov; G. V. Trusov; I. D. Kovalev
AbstractNanostructured mechanical composites of immiscible metals Cu, Cr, and 5–70 wt % W; nanostructured consolidated materials based on them; and Cu/Cu–Cr–W nanostructured gradient material with various W contents are fabricated in this work by combining short-term (up to 150 min) high-energy ball milling (HEBM) and spark plasma sintering (SPS). To fabricate Cu–Cr–W mechanical composites, HEBM of
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Diffusion of Tin in a Solid Solution of the Copper–Tin System Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 V. P. Nikulkina; A. O. Rodin; B. S. Bokshtein
AbstractElectron probe microanalysis (EPMA) has been used to obtain concentration curves and calculate the bulk diffusion coefficients of Sn in solid solutions of the copper–tin system in a tin concentration range of less than 13.9% weight (7.96 at %) and temperature range from 500 to 650°C. Diffusion couples are made from pure Cu (99.995%) and a two-component alloy of Cu with chemically pure Sn by
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Microhardness and Texture Evolution of Ultralight Mg–Li Alloy Processed by Cold Rolling Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 S. S. A. Shah; H. Sang; B. L. Sun; M. Z. Bian; H. M. Jing; G. S. Song
Single β-type Mg–12Li and Mg–12Li–1Al (wt %) alloy sheets were prepared by casting, followed by cold rolling. Microstructure and texture analysis were carried out on the alloy samples using optical microscopy, scanning electron microscope, X-ray diffractometry, and microhardness testing. The results indicated that cold-rolled alloys exhibited elongated grains in rolling direction with many slip lines
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Production of Cast Materials Based on the Cr 2 AlC MAX Phase by SHS Metallurgy Using Coupled Chemical Reactions Russ. J. Non-ferrous Metals (IF 0.576) Pub Date : 2020-07-06 V. A. Gorshkov; P. A. Miloserdov; N. Yu. Khomenko; N. V. Sachkova
It is known that materials based on MAX phases possess a large potential for use in aerospace, automobile, and industrial spheres because they have a unique combination of features of both metals and ceramics with high mechanical, chemical, thermal, and electrical properties. In this work, the experimental results of fabricating cast materials in the Cr–Al–C system with different ratios between the
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