Materials Literature
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The effect of interchain interaction on the nonlinear excitations in the one-dimensional (1-D) Peierls-Hubbard system is investigated by the photo-induced absorption (PA) measurements of the halogen-bridged metal complexes (the MX compounds; M=Pt and X=Br or I), changing the strength of the interchain coupling via the…
An effect of the solutioning conditions on the aging response (precipitation, age hardening) in a β type titanium alloy, Ti–15V–3Cr–3Sn–3Al, is examined.The aging response is strongly affected by the solutioning conditions and closely related to the concentration of quenched-in vacancies, which is a function of the qu…
The influence of the rare earth elements on the non-resonant type third-order optical nonlinearity was studied by third harmonic generation in germanate glasses. The nonlinearity basically increased by the increase in La2O3 content and decreased by the increase in field strength of the rare earth elements. The relatio…
An expedient experimental method has been proposed to characterise the mixing process and performance of powder mixers based on the measurement of changes in the color of the mixture with operating time. To evaluate the mixing and dispersing characteristics among the different types mixing equipment, adhesive fine cal…
Abstract Weldments exhibit special microstructural features that need to be recognized and understood in order to predict acceptable corrosion service life of welded structures. This article describes some of the general characteristics associated with the corrosion of weldments. It emphasizes the role of macrocomposi…
alpha 1-Antitrypsin (alpha 1AT) is a major protease inhibitor present in high concentrations in the plasma. Inheritance of alpha 1AT deficiency or null alleles (alleles associated with no detectable serum alpha 1AT) is associated with an increased risk for emphysema. In contrast to beta zero-thalassemia variants in wh…
The effects of chloride ion concentration on the corrosion behaviour of two Al–Li–Cu–Mg–Zr (8090 and 2091) alloys were studied and compared with that of a standard aircraft alloy, namely Duralumin (Al–Cu (2014)). Constant exposure and potentiodynamic polarisation studies were conducted in NaCl solutions (pH 10·0) of v…
In this paper an experimental and semi-analytical technique is described that provides a method of estimating a macroscopic drying kinetics curve and internal moisture content profiles is described. Moisture gradients and the time evolution of these gradients are analysed as a function of the air drying parameters (dr…
Radiation control coatings (RCCs) are used on building exteriors to reduce the absorption of solar energy. Reduced solar energy absorption results in lower exterior surface temperatures, and, consequently, less heat flow across the building envelope, and reduced electrical requirements to maintain air-conditioned spac…
A discrete structure consisting of peaks separated by hv photon energy was found experimentally in the photoelectron energy spectrum, when illuminating a gold target surface by relatively long light pulses (approximately nanoseconds) and using moderate (approximately 120 MW/cm2) intensity of Nd:glass lasers (λ = 1.06…
The Crystal Structure of the low-temperature, ordered phase of norbornane has been solved and refined from high-resolution powder X-ray diffraction data collected using synchrotron radiation.
Abstract The dehydrochlorination of different samples of PVC under vacuum with continuous removal of HCl by freezing, has been studied at 180–210°C. The comparison of the kinetic curves of the dehydrochlorination of various samples of PVC which were obtained by us and other investigators, with the theoretical curves f…
The properties and advantages of nitride fuels are well documented in the literature. Basically the high thermal conductivity and uranium density of nitride fuels permit high power density, good breeding ratios, low reactivity swings, and large diameter pins compared to oxides. Nitrides are compatible with cladding al…
Effects of Si and Ca addition on delayed fracture of medium carbon steels with 1400N/mm2 strength were investigated. Silicon and calcium were added at concentrations of 02.0% and 3070ppm, respectively. The delayed fracture characteristics were evaluated by FIP (Fédération Internationale de la Précontrainte) test which…
Crystallisation of sucrose in the presence of a second ingredient produces microsized crystal agglomerates with awide variety of functional properties
Crystal growth from solution has been investigated by means of in situ observation. Phase-sensitive microscopy or microinterferometry has been employed in order to understand the kinetics of step motion and the effects of flow dynamics on the crystal growth. Both dislocated and dislocation-free crystal were used as th…
The structures of Mg3Al2Si3O12 and Ca3Al2Si3O12 glasses were investigated by means of the radial distribution function (RDF) analysis based on X-ray diffraction data. The Al and Si atoms in these glasses are essentially in four-fold coordination. The T–O (T=A1 and Si) distance of Mg3Al2Si3O12 glass (1.68Å) estimated f…
The structure of this high nuclearity gold cluster has been determined from a single microcrystal of dimensions 10 × 10 × 30 µm (the X-ray diffraction data were recorded with synchrotron radiation using an Enraf-Nonius area detector diffractometer at Daresbury Laboratory); in the cluster three trigonal bipyramidal Au5…
The composition and p roperti es of boron nitride coatings are described. They can be used to coat and protect metallic and ceramic components used at elevated temperatures. For this purpose, the propert ies of boron nitride as well as the demands placed on starting materials in the producti on of such coatings are di…
Redox data are currently available for each of the pairs Fe 2+ /Fe 3+ , Cr 3+ /Cr 6+ , As 3+ /As 5+ , Sn 2+ /Sn 4+ , Ce 3+ /Ce 4+ and Cu + /Cu 2+ , in equilibrium with oxygen as oxide(-II) and O 2 , for alkali and alkaline earth silicate melts at 1400°C in air atmosphere. For each redox pair, there exists an almost li…