Materials Literature
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We have developed a new microwave plasma torch (MW plasma jet), which can generate a pure H2 plasma jet at atmospheric pressure from the end of a center electrode with an input power above 2 kW. The electric field has maximum strength at the end of the electrodes, so the plasma is initially ignited by the electric bre…
Abstract Studies of lamellar shapes and profiles in linear polyethylene have often been implemented by microscopic examination of appropriately etched random slices through spherulitic specimens. However, since a spherulite crystallized from a bulk specimen is a three‐dimensional assembly of radially oriented lamellae…
Electrochemical noise generation during stress corrosion cracking (SCC) of high-strength aluminum AA(1) 7075-T6 alloy has been investigated in 3.5% NaCl solution under free corrosion potential. The electrochemical noise was observed as spontaneous potential fluctuations. The readings obtained were analyzed using the m…
Abstract Three series of polyurethanes, based on three polyols, diphenylmethane diisocyanate (MDI), and three chain extenders were synthesized. Polypropylene glycol (PPG) soft‐segment length (MW 1000, 2000, and 3000), soft‐segment concentration (30%, 50%, and 70%), and the type of chain extender (ethylene glycol, buta…
Abstract High-resolution transmission electron microscope images of dioctahedral mixed-layer clay structures (illite/smectite) having various substitutional and polytypic schemes were modeled using computer simulation methods. Both one- and two-dimensional calculations were performed using parameters characteristic of…
Structure-property relationships in electronic ceramic materials are reviewed to provide insight into the behaviour of capacitors, thermistors, varistors, and other electroceramic components. Rapid progress in the integration and miniaturisation of ceramic components has led to the development of multipurpose electron…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransmission electron microscopic observation of nascent polypropylene particles using a new staining methodMasahiro Kakugo, H. Sadatoshi, M. Yokoyama, and K. KojimaCite this: Macromolecules 1989, 22, 2, 547–551Publication Date (Print):February 1, 1989Publication History Pub…
X‐ray photoelectron spectroscopy and secondary ion mass spectrometry are used to study the surface chemistry of silicon single‐crystal wafers. Anhydrous and UV/ozone processes modify the surface chemistry by altering the concentration and bonding environments of the most abundant surface atoms: Si, O, C, H, and F. Anh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydroxyapatite formation in a dynamic collagen gel system: effects of type I collagen, lipids, and proteoglycansAdele L. BoskeyCite this: J. Phys. Chem. 1989, 93, 4, 1628–1633Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published ini…
An electroactive polyaniline (PAn) was successfully prepared from nonaqueous propylene carbonate (PC) solution containing acid and electrolyte . PAn deposition and the doping‐undoping process of deposited PAn film were investigated by consecutive cyclic voltammetry in various electropolymerization solutions. It is con…
Etude experimentale et theorique de la structure cristalline.Description des polyedres de coordination.
Peculiarities of phase transitions in disordered perovskite-like crystals—PbMg1/3 Nb2/3 O3 (PMN) and Na1/2 Bi1/2 TiO3 (NBT) have been studied by neutron scattering. The strong quasielastic scattering (QES) related to ferroelectric critical fluctuations has been observed instead of expected inelastic scattering of soft…
Abstract Polymer science is mature enough to allow one to think about tailor‐making macromolecular compounds aimed at interacting purposely with living systems. Reasons for developing bioresorbable polymers for temporary therapeutic applications are discussed with respect to property adjustments and economical factors…
Tensile strengths were measured and Young's moduli were estimated for two SiC‐based and three oxide ceramic fibers for temperatures from 25° to 1400°C. The SiC‐based fibers were stronger but less stiff than the oxide fibers at room temperature and retained more of both strength and stiffness to high temperatures. High…
A high-resolution multiple-reflection diffractometer has been built to study crystals distorted by epitaxy and defects in nearly perfect crystals. The diffractometer combines the merits of the two-crystal four-reflection monochromator (to define a narrow wavelength range with a tailless reflectivity profile) and an an…
Article The Cycling Behavior of Multi-Component Mischmetal — Nickel Hydrogen Storage Alloys on Cycling with Industrial Hydrogen* was published on February 1, 1989 in the journal Zeitschrift für Physikalische Chemie (volume 164, issue 2).
Abstract The phase diagram of the LiCl–ZnCl2 system was determined. The system contained one intermediate compound, Li2ZnCl4; it transformed from the normal spinel to the olivine structure at 215 °C. Electrical conductivity measurements showed a high ionic conductivity of 2.0 × 10−4 S cm−1 280 °C.
Wavelength (600-1600 nm) and time (1000-10000 h) dependence of the 'in situ' /sup 60/Co gamma ray-induced light losses in the pure silica core fibers of high OH and low OH contents, and single mode have been measured under various experimental conditions of high (10/sup 6/ R/h) and low (10/sup 2/ R/h) exposure rate ir…
Silver-indium-cadmium (Ag-In-Cd) control rod behavior in severe reactor accidents is examined with a goal of improving the methodology used to estimate reactor accident source terms. Control rod behavior in both in-pile and out-of-pile experiments is reviewed. A mechanistic model named VAPOR is developed that calculat…
Precision x-ray studies, polarization and electrocaloric measurements have been made with PST-PSN solid solutions in the temperature range −180–+80°C. The large electrocaloric effect δT = 1.0–1.7°C is due to both particular features of structure rearrangement at the 1-order phase transition in the materials and a high…