Materials Literature
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Field measurements of insulator leakage current are necessary for long term data storage for research purposes and condition-based maintenance. Long term monitoring and storage of actual waveform are required since the electrical activity on the insulator surface cannot be predicted in advance. This leads to the accum…
We study the crystal structure and the magnetic properties of Ba1−x Bi x Ti0.9Fe0.1O3 (0 ≤ x ≤ 0.12) ceramics prepared by using a conventional solid-state reaction. X-ray diffraction and Raman scattering spectroscopy measurements show that Bi3+ substitution suppresses the formation of the hexagonal BaTiO3 phase and st…
Ion/electron beam bombardment has shown great potential for improving the surface properties of polymers. Low-energy charged (ion/electron) beam irradiation of polymers is a good technique to modify properties such as electrical conductivity, structural behavior, and their mechanical properties. This paper reports on…
The present work is devoted to the examination of new radiation-protective binder for special-purpose composite materials. The mixture for such advanced binder is developed. The mixture includes portland cement together with special component – barium hydrosilicates. The latter are micro-sized mineral admixtures which…
Pt-Cu bimetallic alloys, as a key component in many heterogeneous catalysts, have the potential to be used in a range of industrially important reactions. The stability of platinum-modified Cu(1 1 0) and Cu(1 1 1) surfaces in the absence/presence of CO, NO and O has been investigated based on density-functional theory…
High potential of two-photon confocal microscopy for photoluminescent tomography of bulk semiconductor crystals are demonstrated in this work using ZnSe crystals as an example. The first results of investigation of ZnSe bulk crystals, both undoped and doped by 3 d metals, are presented. Appearance of luminescence quen…
A complete understanding of the bubble dynamics is deemed necessary in order to achieve their full potential applications in industry and medicine. For this purpose it is first needed to expand our knowledge of a single bubble behavior under different possible conditions including the frequency and pressure variations…
The aim of this study has been to determine the quality of flake graphite in high-grade metamorphic rocks in Sortland, Vesteralen, northern Norway. Flake graphite is present in graphite schist and samples were collected at three different locations, Hornvatnet, Lamarkvatnet and Vikeid. The host rocks of the graphite s…
Coprecipitation followed by sintering were used to synthesize nanocomposite materials in the CoO–SnO 2 system under various conditions. The crystal structure, morphology, chemical and phase transformations of the materials were examined. The specific capacity of the materials was determined in their possible use as el…
The distinctive paper is devoted to development and verification of correct numerical methods for analysis of structural strength and stability of high-rise panel buildings. Particularly the first part of the paper contains brief introduction, description of methods of analysis and simulation software. Information abo…
Finite-element analysis is an important product development tool in medical devices industry for design and failure analysis of devices. This tool helps device designers to quickly explore various design options, optimizing specific designs and providing a deeper insight how a device is actually performing. In this st…
A novel series of Mn III complexes with 5,10,15,20-tetra(p-tolylporphine) and 1,6-diaminohexane has been synthesized. These complexes have been characterized by UV/Vis, IR, ESI-mass spectra, elemental analysis, conductivity and magnetic susceptibility measurements. These Mn III porphyrins exhibited a blue shift in sor…
The present work reports an investigation of the interactions of Al 7075 alloy and anorthite at 850°C (150 h) and 1150°C (24 h). Transmission electron microscopy, electron probe microanalysis, X‐ray diffraction, and scanning electron microscopy coupled with energy‐dispersive spectroscopy were used to identify the mine…
Simultaneously effect of erosion combined with corrosion becomes the most concern in oil and gas industries. It is due to the fast deterioration of metal as effects of solid particles mixed with corrosive environment. There are many corrosion software to investigate possible degradation mechanisms developed by researc…
The relevance of the work is to develop a new method of obtaining submicroscopic metal structure by combining equal channel angular pressing process of deformation and intensive cooling. The process carried out by the pressing of copper and CuZn36 through equal channel angular matrix cooled after the metal matrix of l…
Diffusion of 1,2,3-benzotriazole (BT), as one of the volatile corrosion inhibitors (VCI) for copper and steel, through several polymers was investigated using molecular dynamics simulation (MD). MD were performed by employing the COMPASS force field to estimate the diffusivity of BT through polyethylene (PE), polyprop…
Invisibility cloaks based on transformation optics are often closed structures; however, such a structure limits the kinds of objects that can be placed in the cloak. In this work, we adopt a transformation thermodynamics approach to design an “open cloak”, called a plate directional heat transmission structure, which…
The validity of the application of the n -alkylammonium method to carbonate-rich lithologies was checked by means of a double comparison: First, the method was applied to samples studied by XRD and HRTEM. Second, these results were compared with the chemical compositions obtained independently by analytical electron m…
Abstract We investigated the behavior of waveguide resonance modes in a metamaterial consisting of metallic slit-array slabs separated by an air gap. Simulation results show two unusual types of intersection phenomena. One type is an anticrossing with a specifically recognizable mode repulsion. An effective medium the…
Abstract The thickness and scratch resistance of adsorbed films formed on mild steel samples (MS1020), which have been immersed in water copolymer solutions, are reported. The effects of bulk temperature and the copolymer structures, normal, poly(ethylene oxide)m‐poly(propylene oxide)n‐poly(ethylene oxide)m, and rever…