Materials Literature
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A comparative analysis has been performed for the specific features of the dispersion of the components of the complex permittivity for pure and bismuth-doped thin films of amorphous arsenic triselenide. A correlation between the experimental data and theoretical calculations of similar characteristics obtained in pre…
The influence of inductive heat treatment (by 2.4-kHz current) on the properties of straight-seam steel 1.4301 pipe is investigated. The influence of heat treatment on the resistance of pipe samples to intercrystallite corrosion, stress-corrosion cracking, and pitting corrosion is investigated, for samples that are mo…
In this paper, we briefly review the use of carbon nanotubes and semiconductor nanowires, which represent a new class of nanomaterials actively studied for thin film transistors and electronics applications. Although these nanomaterials are usually synthesised at moderate to high temperatures, they can be transferred…
Methylsilsesquioxane (Me-SSQ) was incorporated into cyanate ester resin (CE) to obtain organic-inorganic hybrids with better dielectric properties in this study. First, methyltriethoxysilane was hydrolyzed and condensed to synthesize Me-SSQ. Then several Me-SSQ/CE hybrids containing different contents of Me-SSQ were p…
In the present work, the oxidation behaviour of 5 vol% Mo/Al 2 O 3 hybrid materials was investigated at high temperatures in air. At oxidation temperature ranging from 600 to 800°C, Al 2 (MoO 4 ) 3 and MoO 3 were developed. The growth of the oxidized zone, at which metallic Mo was not observed, obeyed the parabolic ma…
In this paper polylactide (PLA) nanofibers were successfully prepared via electrospinning using low toxic 1,4-dioxane and acetone as co-solvents. The morphology of nanofibers was studied by scanning electron microscopy (SEM) at the different weight ratios of co-solvent, concentrations of spinning solution, electrostat…
The wollastonite with fibrous structure can be used as the filler in the composite. In this paper, the composite was prepared by incorporating the wollastonite into butadiene styrene rubber (SBR) matrix through the mechanical agitation and roll mixing technologies. Mechanical properties of SBR filled with different am…
New tungstophosphate-functionalized ordered mesoporous silica was synthesized based on monovacant PW11 and block copolymer template. Upon characterizations of the as-obtained PW11/MHS samples by FT-IR, XRD, ICP-AES and N2 adsorption-desorption measurements, it was revealed that Keggin units were retained perfectly in…
Traditional studies of crystallization kinetics are often limited to idealized conditions where the temperatures or the cooling rates are constant. In real manufacturing processes, however, the external conditions change continuously, which make the kinetics of crystallization dependent on instantaneous conditions, es…
Electrical conductivity, X-ray absorption near edge structure (XANES), and synchrotron X-ray diffraction (SXRD) measurements were carried out for (Li2S)x(P2S5)100-x glasses synthesized by a mechanical alloying (MA) technique. It was found that the electrical conductivity of (Li2S)x(P2S5)100-x suddenly increases by mor…
SiC/graphite composites with exelent machinable properties and thermal shock behaviour were successfully fabricated by pressureless sintering at 1700°C in nitrogen atmosphere. A dipping infiltration process was applied to improve the strength and oxidation resistance of the composites. Dense SiC coating was covered on…
The possibility of calculating the residual life of a metal that functions under creep conditions based on the degree of microdamage of its structure with operational microflaws, namely creep micropores, is discussed. The main parameter in the proposed calculation method is the specific number of creep micropores, i.e…
Abstract The objective of the present research is to build a modeling method for delayed hydride cracking (DHC) of zirconium alloys. DHC tests were carried out on Zircaloy-2 cladding tubes in the chamber of a scanning electron microscope to directly observe the crack propagation and measure the crack velocity in the r…
The ordering in carbon formed as a result of annealing of pine wood shavings in argon at T = 1900 and 2250°C has been studied by high-resolution transmission electron microscopy. It is established that the ordering involves graphene layers, which serve as the basis for the formation of monolithic structural elements i…
CVD diamond films are deposited on cobalt cemented tungsten carbide (WC-Co) endmills using hot filament chemical vapor deposition (HFCVD) method. Scanning electron microscope (SEM) and Raman spectroscopy are used to characterize the as-deposited diamond films. To evaluate the cutting performances of as-fabricated CVD…
The synthesis of ZnO architecture on a fluorine-doped SnO 2 (FTO) conducting glass pre-coated with nanoporous TiO 2 film has been achieved by a one-step hydrothermal method at a temperature of 70°C. The effect of the reaction time on the morphology of the ZnO architecture has been investigated, and a possible growth m…
A review of the state-of-the-art and developments in the field of enzymatic degradation of polyurethanes (PUR) has been presented in this part. In the review special consideration was given to the primary factors influencing the polyurethane degradation such as the type of enzyme used, its activity, duration of the pr…
The process of forming three-component nanocrystalline fibers and powders of zirconia, yttria and alumina is studied depending on the component ratio and heat treatment temperature. It has been found that in the investigated system at 500-600 degrees C a nanocrystalline triple solid solution is formed, which exists up…
Intracranial calcifications are not uncommon radiographic findings and usually are nonpathological. However, striocerebellar calcifications may result from metabolic derangements, one common one being hypoparathyroidism. Here, we report a case of Hashimoto’s hypothyroidism where the patient experienced disturbance of…
We present a modeling and simulation based study for the polarization hysteresis of ferroelectric polymers. A 2-dimensional finite element device-level model was implemented using SILVACO's ATLAS device simulator to generate the polarization hysteresis characteristics for the recently reported experimental data on Au/…