Materials Literature
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Peculiarities of the ordered-structure formation in the equiatomic CuAu alloy, which are caused by changes in the sample dimensions and by an applied external force field, have been studied. The rate of the microstructure transformation in the ordered alloy has been found to increase with increasing thickness of the s…
Poly(amide-imide) (PAI)/carbon nanotube (CNT) composite films were investigated through FT-IR spectroscopy, TGA, and DMTA measurements in order to understand the interrelationships of surface modification of CNTs, thermal imidization time, and thermal stability after they were prepared by solution mixing. Thermal stab…
The revealed absorption saturation and Fresnel diffraction of ultrashort laser pulses under resonant excitation of the basic exciton transition in CdSe/ZnS quantum dots (a strongly absorbing colloidal solution) have been explained by the processes of filling of states of a two-level system with the excited-state lifet…
This paper proposes a new fault diagnostic method for the PWM converter. A loop magnetic near field probe is used to detect the magnetic field near the inductor components in the PWM converters, and the measured waveform is utilized as the diagnostic criterion. The features of the waveform are extracted by the Fast Fo…
A series of supramolecular polymers and networks with variable liquid crystalline characteristics have been created. These species are formed though the benzoic acid/pyridine associations of a flexible bisacid and a mixture of a rigid bispyridyl and a non-mesogenic tetrapyridyl. The networked systems displayed liquid…
A study of the technology of the virtual gap in a toroidal core is analyzed and showed in this paper. We made a study about of the effects of a virtual gap in a toroidal core. Through nonlinear finite element simulations we studied the effects that a virtual gap has on a toroidal core. We realized several analysis mag…
The local structure analysis of Li-substituted (Bi0.5Na0.5)TiO3 was carried out by a synchrotron radiation X-ray pair-distribution function (PDF) method. The PDF peak is resolved as a doublet owing to the presence of two phases with distinct local structures, namely, the rhombohedral and tetragonal phases. The coexist…
This research aims to study the effects of degradation on mechanical, physical, and morphological properties of empty fruit bunch (EFB) fiber- reinforced polyester composites. The unsaturated polyester resin has been used to produce thermoset polymer composites. The reinforcing effect in composites was evaluated at va…
Abstract Graphene, a carbon material discovered in 2004 by a group of scientists at the University of Manchester, UK, has been attracting significant attention in both fundamental and applied studies. Due to the rapid increase in the number of articles on this material since its discovery, a range of readers, particul…
The preparation and crystal structures of 3,3''-diethynyl-2,2':5',2''-terthiophene (A(2)T(3)) and three Au(I) complexes containing this ligand are reported. One of the complexes, Au(2)(dppm)(A(2)T(3)), has a short Au-Au distance (3.1969 A) because of an aurophilic interaction. UV/vis absorption and emission spectra of…
Abstract Summary: Macromolecuar chemistry and polymer science have had an enormous impact in many areas of science, engineering, medicine and our daily life. It has not only changed our way of life forever, but also continuously to improve our living standard. Macromolecuar chemistry now also encompasses bioengineerin…
The effect of Ga doping on the temperature dependences (5 K ≤ T ≤ 300 K) of the Seebeck coefficient α, electrical conductivity σ, thermal conductivity coefficient κ, and thermoelectric figure of merit Z of p -(Bi 0.5 Sb 0.5 ) 2 Te 3 single crystals has been investigated. It has been shown that, upon Ga doping, the hol…
The structural property and electric field response of a single perovskite PbTiO3 nanowire were investigated by means of synchrotron X-ray diffraction (XRD) with a micro X-ray beam. XRD θ–2θ patterns and Raman spectra confirmed the formation of the perovskite phase of PbTiO3 by annealing the PX-phase of Pb–Ti–O nanowi…
Si3N4 ceramics with different sintering aids are prepared by gas pressure sintering at 1800°C under 8 MPa N2 atmosphere. The mechanical and microwave dielectric properties of the Si3N4 ceramics with and without sintering aids are investigated. The results show that the sintering aids have a significant impact on the d…
This paper reports that Eu-doped ZnO films were successfully deposited on silicon (100) by radio-frequency magnetic sputtering. The x-ray diffraction patterns indicate that Eu substitutes for Zn in the lattice. Ferromagnetic loops were obtained by using superconducting quantum interference device at 10 K and room temp…
The aim of this study was to investigate the mechanical properties of starch/glycerol/Melissa officinalis, a topical drug delivery system for labial herpes treatment. Four films were prepared with different concentrations of starch, glycerol, and Melissa officinalis extract. The results revealed that increasing the gl…
Objective of this study is to presents an approach for predicting electrical ageing in the lifetime estimation of hydroelectric generator stator windings. Accelerated voltage endurance tests can be used for new or in-service aged stator bars to estimate electrical ageing. However, sample windings removal from each ope…
This paper calculates the structural parameters, electronic and optical properties of orthorhombic distorted perovskite-type TbMnO 3 by first principles using density functional theory within the generalised gradient approximation. The calculated equilibrium lattice constants are in a reasonable agreement with theoret…
Presented below is the review of the results of experimental studies of energy characteristics of Darrieus rotor with vertical rotation axis. Influence of main geometry parameters of the rotor on its energy characteristics has been analyzed. It is shown that Darrieus rotor may have the higher level of energy character…
Fluorescent penetrant inspection (FPI) is a nondestructive testing method for detecting discontinuities and is one of the most promising methods for warning of a possible near future failure. In this paper we present semiconductor quantum dots (QDs) suspended in a colloidal solution as the fluorescent penetrant to det…