Materials Literature
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Optimization of contours of three dimensional electrode-spacer arrangements used in gas insulated systems (GIS) has been carried out by ANN aided genetic algorithm (GA) to obtain desirable electric stress distribution along the insulator surface. Two cases have been studied and reported in detail. Multilayer feed-forw…
Abstract The IR-spectra of 4-aminopyridine (4-AP) in solution and in the solid state have been analyzed, using the reducing-difference procedure. Defining a more precise band assignment of a part of the characteristic frequencies of 4-AP, the data obtained proved in particular a Fermi-resonance splitting of the symmet…
The ability of chromate as an anticorrosive pigment incorporated into primer coatings to inhibit the corrosion of galvanized steel has been studied using cell modeling conditions at defects of painted sheets. The experiments were performed at different temperatures (4, 22, and 40°C) and chloride concentrations (1 mmol…
Abstract Additional information about the relative intensities of reflections that overlap in a powder diffraction pattern can be obtained from a polycrystalline sample in which the crystallites are preferentially oriented. If the data are collected and analyzed appropriately, more single-crystal-like reflection inten…
Abstract This article reviews various phases and constituents found in the microstructures of low-carbon and coated steels. It provides information on the criteria for selecting proper metallographic procedures. Techniques used to prepare metallographic specimens of low-carbon steels and coated steels, such as section…
Abstract Die Synthesen und die Kristallstrukturen des Liganden N, N‐Diethyl‐N′‐(2‐fluor)benzoylselenoharnstoff HEt 2 mfbsu und dessen Ni II ‐ und Zn II ‐Komplexen sowie des Liganden N, N‐Diisobutyl‐N′‐(2‐fluor)benzoylselenoharnstoff HBu i 2 mfbsu und dessen Ni II ‐ und Pd II ‐Komplexen werden berichtet. Die Liganden k…
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Abstract The low-frequency mechanical properties of pure and Ca-doped lead orthophosphate, (Pb 1– x Ca x ) 3 (PO 4 ) 2 , have been studied using simultaneous dynamical mechanical analysis, X-ray diffraction (XRD), and optical video microscopy in the vicinity of the first-order ferroelastic phase transition. Both sampl…
Abstract This article describes the microstructure and metallographic practices used for medium- to high-carbon steels as well as for low-alloy steels. It explains the microstructural constituents of plain carbon and low-alloy steels, including ferrite, pearlite, and cementite. The article provides information on how…
Abstract Polymeric chain complexes, [Ru2(piv)4(pyz)]n(BF4)n·3nH2O (1), [Ru2(piv)4(4,4′-bpy)]n(BF4)n·nH2O (2), [Ru2(piv)4(dabco)]n(BF4)n·2nH2O (3), [Ru2(piv)4(phz)]n(BF4)n (4), and [Ru2(piv)4(H2O)2(tmpyz)]n(BF4)n·nCH2Cl2 (6), (Hpiv = pivalic acid, pyz = pyrazine, 4,4′-bpy = 4,4′-bipyridine, dabco = 1,4-diazabicyclo[2.2…
Abstract The water stability of electrospun poly(vinyl alcohol) (PVA) nanofibres was improved significantly by annealing with poly(acrylic acid) (PAA). Effects of annealing were tested on solution-cast PVA/PAA films by measurement of the swelling degree. The influence of PVA/PAA ratio, annealing temperature and period…
In this study we have investigated temperature and frequency dependence of magnetic properties of superparamagnetic iron oxide nanoparticles (SPION). ESR measurements have been carried out in a temperature range of 10–300 K. A single, relatively broad and temperature dependent EPR signal was observed at all measuremen…
Abstract This article describes the microstructure of copper alloys, including copper-zinc (brasses), bronzes, copper-nickel, and copper-nickel-zinc, and examines the effect of oxygen content on alloy phases observed in different product forms. The article also discusses inclusions, etchants, and the effect of composi…
Atomic force microscopy (AFM) lithography has been performed in La 0.8 Ba 0.2 MnO 3 (LBMO) films. Unexpectedly, controllable nano-sized patterns can be obtained with an excellent reproducibility under a negative sample bias rather than a positive one, which is completely different from doped SrTiO 3 and high T C super…
Abstract An organo‐clay complex was formed by the exchange reaction of a quaternary ammonium salt of a derivatized styrene monomer with Na + ‐montmorillonite clay. The binding of the derivatized styrene monomer with the montmorillonite clay was confirmed by FTIR and the diffused reflectance analysis. The increase of t…
We solve the complete tensor fluctuation problem of a long and straight nematic disclination line with a general winding number in the one elastic constant approximation. Focusing on the eigenmodes growing in time, we show that the disclination with strength higher than 1/2 is unstable with respect to the splitting an…
A new method for preparing a novel antistatic polyacrylonitrile (PAN) fiber modified by nano-antimony-doped tin oxide (ATO) particles is proposed. Nano-ATO particles are first dispersed in water by the dispersant polyethyleneimine PEI, then the nano-ATo suspension is applied in a pre-heating bath during spinning of PA…
In this fourth paper of a series on the effective elastic properties of alumina-zirconia composite ceramics the influence of porosity on the effective tensile modulus of alumina and zirconia ceramics is discussed. The examples investigated are alumina and zirconia ceramics prepared from submicron powders by starch con…
In the study of Plastic Surgery, cell culture may be used at experimental level in researches concerning biosynthesis functions of skin cells such as fibroblasts, keratinocytes, adipocytes, chondrocytes and osteocytes. The present study reports an experimental model for estimation of collagen in cell cultures using ch…
Este trabalho teve como objetivo avaliar o comportamento da madeira de Grevillea robusta na produção de painéis de madeira aglomerada. Os painéis foram produzidos em densidades de 0,60 e 0,80 g/cm³ e conteúdo de resina de 6 e 8%. Os resultados de propriedades físicas e mecânicas dos painéis fabricados com densidade de…