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Article
Evaluation of electrode-oriented properties of BaFe1−xCexO3−δ
The structure, oxygen non-stoichiometry, thermomechanical and electrical properties of perovskite-type BaFe1−xCexO3−δ (x = 0.05, 0.10, 0.15) were studied in the light of the potential use of these oxides as elect...
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Article
The Possibility of Detecting Defects in Rail Foot by the MFL Method
The article investigates the possibility of detecting defects in the form of transverse cracks in rail foot under continuous in-service inspection of rails. The MFL method is chosen as an alternative to ultras...
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Article
Using a Magnetic Flux Leakage Method to Evaluate Gaps in Railroad Bolt Joints
Periodic evaluation of gaps in bolt joints of rails allows one to predict the reliability of a continuous welded rail track and prevent its temperature deformations. The purpose of the research is to find a si...
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Article
Investigation into the significant effect of CuO additive on the synthesis of ZrSiO4: phase formation and crystallization at low temperature
The ZrSiO4 has been synthesized with CuO as mineralizer by sol–gel route at low temperature. The mineralization effect of the CuO on mechanism of zircon formation at low temperature has been studied by high-tempe...
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Article
Synthesis and Compaction of Zirconium Nitride with Use of Zirconium Oxide and Air Supply
A multitemperature model of conjugated heat transfer during the synthesis of zirconium nitride is developed. The model includes the following parameters: the temperature of the solid phase consisting of microm...
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Article
Gasdynamic and Thermal Effects of the Synthesis of Micron-Sized Particles by the Carbon Combustion Method in Straight-Flow and Three-Zone Reactors
An axisymmetric two-temperature model for analyzing the synthesis of multiple oxides by the carbon combustion method is developed. The system of governing equations includes the mass, momentum, and energy cons...
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Article
Correction to: Modeling the Synthesis of Barium Titanate Micron Particles in Axisymmetric Direct-Flow and Three-Zone Reactors
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Article
Dynamic Correction of Sensitivity of Flaw Detection Channels in High-Speed Rail Inspection
An increase in the reliability of high-speed ultrasonic testing of elongated objects, in particular, railroad rails, is considered. It is shown that the current regulatory documents do not take into account th...
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Article
Using a Tail Field in High-Speed Magnetic Flux Leakage Testing
A special magnetodynamic effect arising from high-speed testing of conductive objects by magnetic flux leakage method was studied. At a significant speed of motion of the magnetizing system relative to the tes...
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Article
Thermal and Concentration Expansion in the Synthesis of Barium Titanate in a Once-Through Reactor
A two-temperature model has been developed to analyze the thermal and concentration expansion in the carbon combustion synthesis of complex oxides. The determining system of equations included the Navier–Stoke...
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Article
Analysis of the Parameters of Bottom Signals in the Area of Welded Joints of Rails under High-Speed Ultrasonic Testing
This research is a continuation of the work aimed at analyzing the parameters of ultrasonic signals during high-speed rail inspection. The analysis of the behavior of the amplitudes of the sequences of bottom ...
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Article
Analyzing Ultrasonic Signal Parameters during High-Speed Rail Inspection
The results of investigating the parameters of ultrasonic signals when increasing rail testing speed presented. Signals from rail bolt holes were selected as test reflectors. It is shown that the holes closest...
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Article
Analyzing the Development of Rail Defects Based on Results of Multichannel Periodic Testing
Systems for nondestructive testing (NDT) of rails are multichannel and concurrently use several methods, including ultrasonic, magnetic flux leakage (MFL), visual, and others. Periodic inspection of rails does...
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Article
High-temperature transport in perovskite-type Ca0.25Sr0.75Fe0.75Mo0.25O3 − δ
The comparative study of transport characteristics of SrFe0.75Mo0.25O3 − δ and Ca0.25Sr0.75Fe0.75Mo0.25O3 − δ was carried out in order to evaluate calcium substitution usability to improve functional properties o...
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Article
Detectability of Rail Defects by Magnetic Flux Leakage Method
The ability of the Magnetic Flux Leakage (MFL) method to detect flaws in railway rails in two different ways has been studied. First, a three-dimensional computer simulation of the leakage of magnetic flux aro...
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Article
The First Heterometallic Acetate-Bridged Pt(II)–Pd(II) Complex: Synthesis, Structure, and Formation of Bimetallic PtPd2 Nanoparticles
The reaction of platinum acetate blue, empirically described as Pt(OOCMe)2.50, with palladium(II) acetate Pd3(μ-OOCMe)6 gave the first heterometallic acetate-bridged platinum(II) and palladium(II) complex Pd2Pt(μ...
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Article
Oxygen Nonstoichiometry and Transport Properties of Mixed-Conducting Ce0.6–xLa0.4Pr x O2–δ
The oxygen nonstoichiometry and electrical conductivity of fluorite-type solid solutions Ce0.6‒xLa0.4Pr x O2–δ (x = 0.1–0.2) were studied in the oxygen partial pressure range 10–...
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Article
Transport and Electrochemical Properties of SrFe(Al,Mo)O3–δ
In this work, effects of molybdenum do** on the crystal structure, stability, electrical conductivity, oxygen permeability and thermomechanical properties of Sr(Fe,Al)O3–δ-based perovskites, were studied. The e...
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Article
Fabrication and Testing of a Tubular Thermoelectric Module Based on Oxide Elements
A thermoelectric module with a tubular design, considered as particularly promising for energy recovery from hot exhaust gases of vehicles was fabricated and successfully tested under laboratory condition. The...
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Article
The impact of Ba substitution on high-temperature transport in lanthanum-strontium ferrite
Effect of barium content on structural, thermal, and transport properties of oxides La0.49Sr0.5–x Ba x FeO3–δ (х = 0, 0.25, 0.50) was studied wit...
