Materials Literature
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Conditions of the synthesis of magnetic semiconductor films of composition Mg(Fe 0.8 Ga 0.2 ) 2 O 4−δ on silicon have been optimized. As the barrier layer, which prevents the interaction between the film and the substrate during high-temperature crystallization of the films, a film of nanosized silicon dioxide was use…
The effect of the structure of stable nitroxyl radicals on their adsorption from organic solvents on montmorillonite modified with cationic surfactants is examined. The influence of the nature and content of the modifier and solvent, as well as additional modification with cationic dyes, on the adsorption is considere…
A method of decreasing the operating temperature of devices based on proton-hopping transport is considered, which is new in the field of solid-oxide fuel cells. It is shown that the room-temperature rate of proton-hopping transport in rutile-type oxides can be sharply increased in a sample excited by resonant infrare…
(Ti,V)2AlC solid solutions with Al2O3 addition were produced by solid state combustion involving aluminothermic reduction in the mode of self-propagating high-temperature synthesis (SHS). Starting materials included Ti/V2O5/Al/Al4C3 and TiO2/V2O5/Al/Al4C3 powder mixtures. Attempts were made to obtain (Ti1-xVx)2AlC wit…
Wetting behaviors of pure nickel and nickel-based alloys on sintered silicon carbide ceramics and their interfacial microstructures were investigated in this presentation. The nickel-based alloys were mainly the commercial nickel-molybdenum-chromium products. The wetting and spreading properties were observed by a rea…
Abstract The paper presents the investigation of the relation between the acoustic emission (AE) and instability of plastic deformation type Portevin-Le Chatelier (PLC) of single-phase brass CuZn30 monocrystals with crystallographical orientation [1¯3 9]. The monocrystals have been investigated applying the method of…
In this paper, an investigation on the operational envelopes of electrically excited (EE) and hybrid excitation (HE) machines for electric vehicles (EV) is highlighted. A computationally efficient calculation method utilising 2D scanning of finite element analyses (FEA) having different d- and q-axis currents is devel…
Features of formation and migration of radiation-induced defects in carbon nanotubes (CNT) and nanostructured materials are examined. The main methods and software tools used for the simulating nanomaterial structure and space factors are described. The results of mathematical simulation are presented.
The features of melt flow of LDPE and boron oxide oligomer blends during extrusion mixing are investigated. It is established that the extruder-wall pressure and the torque of the screw decrease monotonically with an increase in the boron oxide oligomer content up to 25 vol %. Exceeding this concentration threshold le…
The present work describes the results of experimental research of surface layers of fine silicate coatings appearing due to the minerals, such as lubricating coatings as fillers. It is shown that the structure of protective films degrades primarily due to accumulation of impurities in the boundary layer and at the in…
The main physicochemical properties of the extracts, such as density, viscosity, and conductivity, as well as the mutual solubility of the phases in the ROH-H2O and ROH-H2O-H3PO4 extraction systems, where ROH (R = C5–C10) stands for higher monofunctional aliphatic alcohols with a different length and structure of the…
The purpose of this project was to study para rubber sheet drying at temperature of 40°, 50°, 60° and 70°, air velocity of 0.5 and 1 meter/second. The obtained experimental results were used to calculate moisture ratio values. Then the results obtained from 10 different types of thin layer drying models were compared…
Günümüzde elektrolit olarak kullanımı en yaygın olan membranlar perfluoro sülfonik asit membranlardır. Ancak bu membranların yüksek sıcaklıkta proton iletkenliği düşüktür ve çok pahalıdır. Bu nedenle çalışmalar alternatif membranlar arayışı üzerine yoğunlaşmıştır. Bu çalışmada Nafion® içerikli membrana göre daha iyi f…
Все чаще в аэрокосмической и гражданской отраслях промышленности при изготовлении изделий из ПКМ используют армирующие плетеные преформы. Такие материалы характеризуются значительным сопротивлением расслаиванию и удару, высокой устойчивостью к усталостным нагрузкам. Использование таких преформ позволяет обеспечить воз…
The need for nanomaterials biosafety and risk assessment is an offshoot of the widespread use of nanoscale particle (NP)-derived materials in over 300 nanotechnology-based products already in commerce, including over 70 healthcare-related products (WWICS, 2006). Rapid advances in material sciences research and the adv…
Highly luminescent CdSe quantum dots (QDs) with narrow spectra were synthesised by the reaction of CdCl 2 ·2.5H 2 O, Se and hydrazine hydrate (N 2 H 4 ·H 2 O), respectively, in water and in the presence of 3‐mercaptopropionic acid as the stabiliser. The effects of the experimental conditions, including the refluxing t…
In this paper, a flame retardant dimethyl-2–(methacryloyloxyethyl) phosphate (DMMEP) was applied to wool fabrics by the graft copolymerization technique initiated with potassium persulfate (KPS) in water media. FTIR and SEM testing were used to explore the grafting evidence on the fiber surface, the SEM results show c…
The release kinetics of recombinant human bone morphogenic factor 2 (rhBMP-2) from collageneous hydrogel in the presence of human blood plasma have been studied. The expulsion of rhBMP-2 from the collagen-BMP-2 complex by the competitive adhesion of collagen-binding proteins penetrating from plasma was firstly recogni…
Abrasive and erosive properties of coal can lead to serious operational problems in mining industry. Here the abrasive medium is varied, containing often fractions of quartz, pyrite, and contents of coal which can be also mixed with water resulting in an abrasive slurry mixture. A better understanding of the dependenc…
Insulator strings are extensively used in high voltage transmission lines in order to mechanically support the line and as the electrical insulator between line and the tower. Due to the high intensity electric field, corona phenomenon may cause a complete failure of the insulator. Therefore, applying corona rings on…