Materials Literature
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A study of samples of metal-ceramic beryllium using atomic force microscopy and nuclear scanning probe microscopy is carried out. Images of the surface at different scale levels are obtained (5 × 5 μm, 10 × 10 μm, 30 × 30 μm, and 90 × 90 μm); structural analysis of the samples is performed. By example of processing RB…
Mechanical robustness of polymer solar cells should be ensured for the device reliability, but the brittle active layers of fullerene derivative based polymer solar cells would fracture easily causing the device failure. Therefore, mechanical properties of polymer solar cells should be investigated thoroughly in order…
Nonlinear effects hold great potential for a wide range of applications - all-optical signal processing, beam shaping and steering, optical computing, sensing, detection and general meteorology, to name a few. However, typically non-linear effects are weak; a typical non-linear index change is on the order of 0.01% or…
Termal kararlılık, ahşap materyallerin en önemli\nözelliklerinden biridir. Bu yüzden birçok çalışma termal kararlılığı\niyileştirmek için yürütülmektedir. Nanoteknoloji geleneksel metotlarla\nsağlanamayan termal kararlılığı artırmak için önemli bir fırsat sunmaktadır.\nOdun içerisinde nanopartiküllerin dağılımları ne…
Resumo O modo como a transferência metálica ocorre na soldagem MIG/MAG influencia diretamente na produtividade e estabilidade do processo, assim como, nos aspectos geométricos do cordão de solda. O presente trabalho avaliou o uso do carbonato de cálcio e do dióxido de silício como fluxos na soldagem A-MIG do aço inoxi…
The results of calculating the thermal electromotive force for a crystalline state and a model lattice of nanoclusters of noble transition metals Ag, Au, and Pd are presented. The electron structure was calculated by the method of density functional theory (DFT) with the plane-wave pseudopotential and the generalized…
In this study, a novel dumbbell-shape graphene nanoribbon (DS-GNR) was proposed for use in electronic devices, such as strain sensors. The electronic band structure of various dumbbell-shape (DS) structures and its change under the application of strain were analyzed by using first-principles calculations. All the fir…
Collagen-based dressings are advanced wound dressings that provide an extracellular matrix to support tissue and microcirculation growth. Collagen dressings are able to change the wound biochemistry through modulation of protease activity, creating an environment more favourable for healing (Level 1). Oxidised regener…
An assessment of activity concentrations in the naturally occurring radioactive materials have been carried through gamma ray spectroscopy method for the environmental samples from two gas fields of Bangladesh. Besides, the radiological hazard parameters are also estimated. The observed activity concentrations of226Ra…
Multifunctional software-controlled systems for monitoring the physical parameters of nuclear research reactor radiation has been developed at the All-Russian Research Institute of Experimental Physics (VNIIEF). The paper discusses approaches to designing and principles of building such systems as a combination of sof…
Pergularia daemia belongs to the family Asclepiadaceae, known to have anticancer, anti-inflammatory activity. Aim of the present study was to evaluate qualitative and quantitative phytochemical and antioxidant properties of ethanolic extracts of leaf, stem and root parts of P. daemia . Preliminary phytochemical analys…
Photonic topological insulators are optical structures with a bandgap in the bulk that support gapless, one-way and reflection-free edge states at their boundaries, originating from their non-trivial topological properties. Here we propose that an optical frequency photonic topological insulator can be realized in an…
High performance dielectric storage films are widely applicated in the high technology field like new energy vehicles, wind turbine generators, avionic industries, oil and gas explorations etc. To improve the energy storage density of the dielectric films, achieving high electric breakdown strength and permittivity ar…
This article presents experimental results on significant increase in the strength properties of the rapidly quenched ferritic/martensitic stainless steel obtained by consolidation of the rapidly quenched powder which was revealed during tension tests of the ring specimens of the nuclear fuel cladding tubes after expo…
A phnolic-based electrically cnductive paste containing copper fillers that is curable in air was successfully prepared by surface treatment of fillers using an aliphatic amine (tetraethylenepentamine, TEA). This surface treatment was found to effective to enhance electrical conductivity development during curing. The…
The crystallinity of the fine interconnections was evaluated quantitatively by using electron back-scatter diffraction (EBSD) analysis The image quality (IQ) value, the average sharpness of Kikuchi pattern obtained from the analysis was applied to the quantitative evaluation of the quality of grains and grain boundari…
Characteristic X-ray spectra of materials containing heavy-metal components irradiated with gamma rays are measured. The samples are irradiated with photons with energies of 122.06 keV (85.5%) and 136.47 keV (10.7%) emitted by a cobalt-57 source and include tungsten, lead, and bismuth plates and a sample of a radiatio…
The influence of the shock-wave action of plasma on the structure and properties of coatings of magnesium and boron on various ductile metals (copper, aluminum, tin) was studied in this work. Experiments were performed to investigate the capabilities of МgВ 2 synthesis from the powder mixture of Mg and B in a metal co…
In this paper, we have developed a model of radiation-induced densification of uranium-gadolinium fuel. The fuel is established to be in the brittle state under irradiation in the volume of uranium-gadolinium fuel pellet containing a burnable neutron absorber and in the plastic state out of this volume. The plastic zo…
Thin TiO x films were deposited on glass by magnetron sputtering of a preoxidized ceramic target at various flows of oxygen added to argon during sputtering. Oxygen flow level providing growth of a stoichiometric oxide coating was established. Stoichiometric oxide coatings demonstrated approximately 20% increase in vi…