Materials Literature
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The thermoelectric power of silicon micro-samples grown by Czochralski method (Cz-Si) and annealed at 450 °C has been investigated at enhanced pressure up to 16 GPa. The correlation has been established between the thermoelectric power and pressure of the semiconductor-metal phase transition, on the one hand, and mech…
The main objective of this study is to investigate the air flow and effect of several parameters on weft insertion, and thus to provide a valuable guide for both air-jet weavers and researchers by establishing a better understanding of air-yam interactions in air-jet weaving machines. Air pressure and velocity are mea…
BACKGROUND: Periodontal ligament (PDL) cells, connecting root cementum with alveolar bone, are important for periodontal wound healing. In order to obtain a predictable periodontal regeneration, selective adhesion and proliferation of PDL cells are essential. The purpose of this study was to investigate the effects of…
Uniform magnetization (dc) noise is studied using numerically generated arrays of grains. The effects of packing fraction, grain size distribution, and anisotropy orientation are examined. From electron microscopy results, in this initial study, the intergranular grain boundary separation is held fixed. In general, th…
We investigate the related strength properties of 3D solid orthogonal fabric panels under conditions of low strain, then analyzes the response of these fabrics to low tensile loads. We also determine how it is possible to deduce the tensile properties of 3D solid orthogonal fabrics panels from the known properties of…
Dielectric relaxation behavior of a ferroelectric liquid crystal (Felix-15/100) showing SmC * –SmA phase transition have been reported. Thickness dependent dielectric constant measured by varying the cell thickness (∼6, 11, 18, 36, 59 and 79 µm) showed increase of dielectric constant and the ferroelectric transition (…
Ferroelectric Bi3.25La0.75Ti3O12 (BLT) thin films were fabricated by a metalorganic decomposition deposition aimed at investigating the thickness effect on ferroelectric properties. Both the grain growth behavior and ferroelectric properties (dielectric constant, remanent polarization) were found to be dependent on th…
Several prediction models for internal corrosion of oil and gas pipelines have been developed. Some of the models are based on mechanistic modelling of the different processes involved, while other models are mainly based on empirical correlations with laboratory or field data. The models have very different approache…
An energetic model is used to calculate macroscopic magnetization behavior of thin Permalloy films. Therefore it is extended by magnetocrystalline anisotropy energy and domain classes that particularly represent magnetization rotation. Some model parameters can be related to coherent rotation of domain magnetizations.…
The field emission (FE) characteristics of boron nitride (BN) nanofilms grown on flat and roughened GaN substrates are investigated. A significant improvement is achieved by the BN nanocoating sample in contrast to a BN thick coating sample. In order to obtain a large field enhancement factor, H2 plasma treatment is e…
Raman scattering spectra of RbMnCl 3 are measured at room temperature under high hydrostatic pressure. The results are interpreted based on first principles lattice dynamics calculations. The experimental data obtained correlate with the calculations in the low frequency domain but disagree slightly in the region of h…
Polarization dependent near and extended x-ray absorption fine-structure (XANES and EXAFS), in combination with x-ray diffraction, has been used to study the structure of SrTiO3 (STO) ultra thin films grown on Si(001). For the in-plane direction (200), the x-ray diffraction data indicate that all films (from 40 to 200…
The increasing amount of post-consumer waste leads to a search for effective recycling methods. Compatibilisation of immiscible blends of polypropylene (PP) and polyethylene terephthalate (PET) represents one such novel approach that allows recycling of significant scrap materials without any need for separation steps…
Abstract A new model for the case of a superposition of a phase transformation and a microstructure transition from columnar plane front to equiaxed dendritic growth for peritectic alloys is presented. This model is applied to Fe–Ni alloys where a phase transition from γ to δ takes place when the solute content decrea…
The structure, electrical resistivity, thermopower, and magnetic susceptibility of titanium diselenide intercalated with nickel (N x TiSe 2 ) are studied systematically in the nickel concentration range x =0–0.5. In accordance with a model proposed earlier, strong hybridization of the Ni3 d /Ti3 d states is observed,…
This article describes three new methods for performing simple flame tests using cotton swabs. The first method uses a Bunsen burner and solid metal salts; the second method uses a Bunsen burner and 1 M aqueous solutions of metal salts; and the third method uses candles, rubbing alcohol, and solid metal salts. These m…
Abstract Metal-free phthalocyanines were prepared in good yields by heating phthalonitriles with hexamethyldisilazane, (NH4)2SO4, and DMF. Good yields of metal-free phthalocyanines involving peripherally substituted phthalocyanines were attained with a catalytic amount of hexamethyldisilazane. Naphthalocyanine was als…
Possible mechanisms of a number of magnetoplastic effects in magnetically disordered crystals are analyzed in the context of the chemical kinetics of reactions occurring in a system of structural defects upon plastic deformation. Particular attention is given to spin-dependent reactions between real-structure elements…
Microporous two‐phase AlN–SiC composites were prepared using Al 4 C 3 and either Si (N 2 atmosphere) or Si 3 N 4 (Ar atmosphere) as precursors. The reaction mechanisms of the two synthesis routes and the effect of processing conditions on reaction rate and the material microstructures were demonstrated. The exothermic…
Postirradiation annealing tests were performed to obtain the 133Xe diffusion coefficients in uranium dioxide (UO2) and mixed thorium-uranium dioxide [(Th-U)O2] fuels. Specimens were a single-grained UO2, a polycrystalline UO2, and a polycrystalline (Th-U)O2. The (Th-U)O2 specimen was a mixture of 35% ThO2 and 65% UO2.…