Materials Literature
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Magnetization as a function of temperature has been measured for amorphous (a-) (${\mathrm{Fe}}_{\mathit{p}}$${\mathrm{Ni}}_{1\mathrm{\ensuremath{-}}\mathit{p}}$${)}_{80}$${\mathrm{B}}_{19}$${\mathrm{Si}}_{1}$ (0.0625\ensuremath{\le}p\ensuremath{\le}0.2), (${\mathrm{Fe}}_{\mathit{p}}$${\mathrm{Ni}}_{1\mathrm{\ensurema…
A process is introduced for producing continuously graded materials by slip casting with a continuous flow of slip of changing composition. The approach has been tested using alumina and zirconia slips to produce alumina/zirconia composites with a graded composition. Observation of the microstructure has shown that th…
Abstract The inhibition of steel corrosion in 0.5 M sulfuric acid by adenine at different temperatures was shown to follow the Langmuir adsorption isotherm over a wide concentration range (10−5 to 10−3 M). The corrosion potential, corrosion current, corrosion rate, polarization resistance, as well as activation energy…
Abstract X‐ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) were used to study the influence of fluorine contamination on aluminium microchip bond pads. Sputter depth profiles indicated that the oxide layer thickness on those band pads, which showed poor gold wire adhesion, was higher than th…
X-ray photoelectron spectroscopy (XPS) spectra of palladium chloride (PdCl2) are presented. Ground PdCl2 powder was pressed into Al foil and analyzed with a Surface Science Instruments SSX-101 M-Probe ESCA instrument using monochromatized Al Kα x rays. Spectra include a survey scan, the Pd 3d, 3p, 3s, 4s, 4p regions,…
Poly(ethylene terephthalate) is used in numerous industrial applications. Successful medical applications are in the area of cardiovascular surgery. Its chemical functionality makes it propitious to grafting biochemical compounds; surface modification by plasma treatment may also be used to improve biocompatibility an…
Control of nucleation may be needed to obtain a reliable supply of large protein crystals, when standard techniques give many small or twinned crystals. Heterogeneous nucleation may be controlled by the use of fine filters, with the elimination of airborne contaminants by working under paraffin oil. The area of contac…
Abstract A review containing 83 references on the chemistry aspects (mechanism and structure–property relationships) for IPN synthesis is presented.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPossible Hard Materials Based on Interpenetrating Diamond-like NetworksDavide M. Proserpio, Roald Hoffmann, and Paul PreussCite this: J. Am. Chem. Soc. 1994, 116, 21, 9634–9637Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published ini…
The effective transverse thermal conductivity of Si3N4 thin films is determined as a function of film thickness. Results indicate that the effective thermal conductivity behavior of Si3N4 thin films is similar to that exhibited by amorphous SiO2 films; that is, there is no significant difference between the thermal co…
Amorphous silicon oxynitride powder was synthesized by nitridation of high‐purity silica in ammonia at 1120°C. The resulting material was X‐ray amorphous, and its chemical characteristics were determined by X‐ray photoelectron spectroscopy (XPS) and 29 Si nuclear magnetic resonance (NMR). The XPS analysis showed a shi…
ABSTRACT This article describes the effect of various environmental conditions on the speed of freshwater diatoms. The diatoms display a wide distribution of cell speeds, from 0 to > 20 μm·s −l , as indicated by both the distribution of speeds within a cell population as well as the distribution of 1‐s interval spe…
Deep level transient spectroscopy was employed to investigate the effect of two different dopants (aluminum and silver) on the electronic states of ZnO varistors. The base composition was a typical commercial formulation, and specimens were prepared by the mixed oxide route. Two electron traps were detected: trap L 1…
Future environmental regulations will limit the volatile organic content of many coatings, including those used on the internal walls of aluminum (Al) cans. Thus, the coating industry is interested in rapid development and testing of new coatings. Commercial coating evaluation requires testing of a large number of sam…
Results of measurements in situ of electrostrictive strain, dielectric polarization, dielectric constant, and crystallographic parameters as functions of applied electric field in the temperature range 20–200 °C of Pb0.97La0.02(Zr0.66Ti0.11Sn0.23)O3 composition are reported. The antiferroelectric to ferroelectric phas…
Abstract The large contents of octahedral vacancies in published formulae of chlorite from hydrothermal systems and clastic sequences are shown to be largely caused by inclusion of other minerals. Verification is provided by analytical electron microscope (AEM) analyses of chlorite in pelitic rocks from the Gaspé Peni…
The Commission on Powder Diffraction of the IUCr has undertaken a round robin of Rietveld refinement with the aims of: (i) evaluating a cross section of currently used software; (ii) examining the range and effect of various strategies of refinement; (iii) assessing the precision and accuracy (spread) of the derived p…
Stable radical species (e.g. see Fig.) can form an alternative source of organic conducting materials. Suppressing the Peierls distortion and stabilizing the metallic state can be achieved by applying pressure or by developing materials with enhanced two and three‐dimensional interactions. Recent progress in the synth…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLamellar Thickness Distribution in Linear Polyethylene and Ethylene CopolymersL. Lu, R. G. Alamo, and L. MandelkernCite this: Macromolecules 1994, 27, 22, 6571–6576Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 Octob…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Heterodinuclear .mu.-Ethynediyl Palladium-Platinum Complexes with Isocyanides: Living Polymerization of Aryl IsocyanidesKiyotaka Onitsuka, Koichi Yanai, Fumie Takei, Takashi Joh, and Shigetoshi TakahashiCite this: Organometallics 1994, 13, 10, 3862–3867Publicati…