Materials Literature
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Abstract The presence of copper-containing intermetallide phases significantly decreases the corrosion resistance of 1441 aluminum alloy. Because the possibility of the preparation of high-performance conversion coatings (CCs) in IFKhANAL-3 chromateless solution, which have protective properties that are no worse than…
In this paper, the microwave technology has been applied to measure the plasma parameters in large-volume AC glow discharge with coaxial gridded hollow electrodes. By measuring the phase shift of microwave through the plasma, the characteristics of the plasma density changing with the input power in hollow ac discharg…
One of the most serious problems that cause the failure of the Gas insulated substations is the presence of contaminating particles inside its compartments as it adversely affects the withstand capability of the system. In this paper diagnosis of particles presence based on the detection of time-to-discharge is presen…
Semi-buried structures are most commonly used at first line of defense along the border between two countries. This demands investigation of their dynamic behaviour under blast loading. Herein, a semi-buried structure with foam sandwiched walls and buttresses to reduce the effect of blast is analysed. The effect of pr…
The oxidation behavior of powders and porous powder composites on the base of titanium diboride used as the material for wettable cathode in aluminium electrolysis cells has been investigated in different gaseous atmospheres (air, argon, reducing atmosphere). In air at 800-1270 K materials were fully oxidized from sev…
Abstract— Al- and Zr-containing sols intended for producing Al2O3 and ZrO2 nanocoatings, respectively, were prepared by a sol–gel process using N,N-dimethyloctylamine (DMOA) and acetylacetone (acacH). Aluminum and zirconyl nitrates were used as metal precursors. The DMOA/Al and DMOA/Zr molar ratios were 1 and 2, respe…
The focus of this study is to Investigate, study and modification of chitosan molecules tow with nano silver particles as an adsorbent for absorbing oil industry palm oil mill effluent. Liquid waste palm oil industry (POME) from local palm oil mill is used as a sample of oily wastewater. High molecular chitosan from c…
The structure of liquid Ga at ambient pressure (AP) were generated separately via ab initio and classical molecular dynamics simulations, and analysed with a cluster approach developed in terms of the local bond-orientational order (LBOO) parameters. Two types of cluster structures were found in both simulated liquids…
The nanoparticles of NaYF 4 : Er 3+ , Yb 3+ , Nd 3+ present fluorescent emissions by upconversion. These emissions are associated with the doping ions of Er, Yb and Nd in the NaYF 4 nanoparticles. The nanoparticles of NaYF 4 doped with Er 3+ and Yb 3+ ions produce upconversion radiation when excited by 980 nm waveleng…
Industrial approbation Technological processes Filling-retanning Semi-finished chrome Tanning product Production of elastic leather Physicochemical propertiesFor the industrial approbation of the developed biotechnologies, using the chrome tanning semi-finished product of wet-salted raw material of cattle -heavy heife…
SnO 2 quantum dots were successfully prepared via chemical precipitation assisted by ultrasound. X-ray diffraction analysis confirmed the rutile tetragonal structure of SnO 2 QDs with a crystallite size of 1.4 nm. The SEM micrographs of the obtained powder exhibited that the SnO 2 QDs are agglomerated particles of aro…
The paper shows results of Faraday Effect study of potassium-alumina-borate and metaphosphate glass under uniform longitudinal magnetic field. The Verde constant of glass under study is obtained based on the experimental data for several wavelengths. Magneto-optical properties of two types of glass: K2O-Al2O3-B2O3 gla…
In this work we investigate the response on THz radiation of a FET device based on an individual carbon nanotube conductance channel. It was already shown, that the response of such devices can be either of diode rectification origin or of thermoelectric effect origin or of their combination. In this work we demonstra…
This paper is devoted to development of technology of formation and obtaining of the design of a field emitter of electrons with an active region based on carbon nanostructures. The main idea of this technology is using of plasma methods, such as plasma chemical etching and plasma chemical vapor deposition. Using a ma…
We report on detection of sub-THz radiation (129-430 GHz) using graphene based asymmetric field-effect transistor (FET) structures with different channel geometry: monolayer graphene, graphene nanoribbons. In all devices types we observed the similar trends of response on sub-THz radiation. The response fell with incr…
In the triple-junction InGaP/Ga(In)As/Ge solar cells there is an unused potential for increasing efficiency. The photocurrent of the lower (Ge) subcell greatly exceeds the photocurrents of the middle (GaAs) and upper (GaInP) subcells. It leads to recombination losses in the lower subcell. Integration of quantum dots a…
Vulcanization with electron beam irradiation provides unique and high efficient processing for natural rubber latex. It is one of very interesting and effective industrial applications of particle accelerators. A radio-frequency (RF) linear accelerator (linac) and electron beam irradiation system have been developed f…
The impact of different calcination temperature (550, 650, 750 and 850 °C) on the structural/electrical properties of sintered Cu/Sm co-doped CeO 2 prepared by sol-gel combustion were studied. Structural properties were studied by X-ray diffraction (XRD), Raman spectroscopy and ultraviolet-visible spectroscopy (UV-VIS…
Cu-doped BiFeO 3 (x = 0, 0.2, 0.3 and 0.5) thin films were fabricated on Pt/Si n-type substrates by a spin coating method. The phase and structure of thin films were characterized by x-ray diffraction (XRD). The homogeneous surface and the film thickness (200-300 nm) of the thin films were investigated by scanning wit…
In article number 1801219, Zhuo Kang, Yue Zhang, and co-workers fabricate an ultrasensitive photodetector based on an all-inorganic perovskite quantum dot-monolayer MoS2 mixed dimensional van der Waals heterostructure. Owing to the synergistic effect of photogating and Schottky barriers modulation, the corresponding p…