Spectroscopy of Nd:KYF4
A single crystal of Nd:KYF4 is grown by top- seeded solution growth. Absorption and fluorescence spectra reveal multiple Nd sites in the material.
Materials Literature
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Mechanical Behavior of Respirable Fibrils of Kevlar Aramid Fibre, Glass, and Asbestos
The deformation of equivalent size and shape glass, asbestos and Kevlar∗aramid fibrils, when subjected to bending or longitudinal compressive loads, was estimated based on published mechanical properly data and established mechanical analysis. Based on this analysis, Kevlar fibrils are expected to deform more easily t…
Characterization of thermal performance of fibrous insulations subject to a humid environment
The insulating capability of a typical Fiberglas insulation slab exposed to different types of environment on each side of the slab was evaluated, based on theory that takes into account heat conduction, natural convection, phase changes, and gas infiltration. The results are analyzed and combined with recent theoreti…
Arc Welding of Carbon Steels
Abstract This article discusses the susceptibility of carbon steels to hydrogen-induced cracking, solidification cracking, lamellar tearing, weld metal porosity, and heat-affected zone (HAZ) mechanical property variations. The composition and mechanical properties of selected carbon steels used in arc welding applicat…
Pitting Corrosion of Copper in Aqueous Solutions Containing Phosphonic Acid as an Inhibitor
The pitting corrosion of copper in cold water containing inhibitors composed of amino trimethylene phosphonic acid (ATMP), benzotriazole (BTA) and zinc sulfate (ZnSO4) has been studied by the immersion test and electrochemical measurements. The results obtained are summarized as follows: 1) the pitting corrosion of co…
A review of “Ferroelectric materials and their applications
Yuhuan Xu. North-Holland, Amsterdam, London, New York, Tokyo. 1991. xiv + 391 pp., 177 Figures, 50 Tables. US $171.50, Dfl. 300.00, ISBN 0-444-883 54-1.”
Parent Materials of Holocene Volcanic Ash Soils on South Kanto District, Japan. Evaluation with primary mineral and element composition.
Volcanic ash soils occur widely on South Kanto district. The surface soil has black color and high humus content. The parent material is derived from Holocene volcanic ash. There are some buried humic horizons resulted from a succession of volcanic ash accumulation and plant residue supply leading to the accumulation…
An overview of water-resistant cable designs
An overview of the most current information on several different constructions and materials that help combat water treeing is presented. After a brief description of the treeing phenomenon, the author covers accelerated cable life testing, noting the various compounds normally used as the insulation for the medium vo…
X-Ray Diffraction Orientation Studies Using Two-Dimensional Detectors
Two-dimensional detectors utilized in x-ray diffraction studies are described. Film, image intensifier/CCD camera, two-dimensional position-sensitive area, and photostimulable storage phosphor detectors are compared. The storage phosphor detector was found to be well suited for analysis of oriented semicrystalline pol…
Hydrogen in Nb and Nb/Ti/Nb Thin Films*
Epitaxial Nb and Nb Ti Nb films on sapphire substrates were prepared by e beam evaporation and sealed with thin Pd or Au layers to avoid oxidation. Hydrogen charging was performed from the gas phase and the concentration in the films was measured by the N 15 nuclear reaction method. For the single Nb layer the hydroge…
Crystal structure of (tetrahydrothiophene)-trichlorogold(III), C4H8AuCl3S
Article Crystal structure of (tetrahydrothiophene)-trichlorogold(III), C4H8AuCl3S was published on January 1, 1993 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 208, issue 1).
Ceramic Component Processing Development for Advanced Gas Turbine Engines
Norton/TRW Ceramics (NTC) is developing ceramic components as part of the DOE-sponsored Advanced Turbine Technology Applications Project (ATTAP). NTC’s work is directed at developing manufacturing technologies for rotors, stators, vane-seat platforms, and scrolls. The first three components are being produced from a H…
Infrared Spectra of Phthalic Anhydride and Its18O Substituted Derivative
Infrared spectra of pthtalic anhydride and phthalic anhydride-18O have been measured in the solide state and in solutions in the 4000 – 100 cm−1 frequency region. Their linear dichroic infrared spectra in oriented nematic solutions in the nematic liquid cristal ZLI-1538 (4000 – 400 cm−1) have also been recorded and st…
The determination of interaction parameter χ1 for polyvinyl alcohol and water from the diffusion data
The Flory interaction parameter χ1 of polyvinyl alcohol-water systems has been estimated from the diffusion data, the polyvinyl alcohol having been crosslinked from terephthalaldehyde. The values of χ1 are reported for the polymer volume fraction between 0·130 and 0·326. The values of χ1 for the terephthalaldehyde-cro…
Studies on the stability of dimethyl disulfide-polysulfide mixtures under sour gas pressure
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies on the stability of dimethyl disulfide-polysulfide mixtures under sour gas pressurePeter D. Clark, Edward Fitzpatrick, Clement S. C. Lau, and Christopher O. OriakhiCite this: Energy Fuels 1993, 7, 1, 155–158Publication Date (Print):January 1, 1993Publication History…
DEPOSITION OF DIAMOND-LIKE AND OTHER SPECIAL COATINGS BY PULSED LASER ABLATION AND THEIR POST-SYNTHESIS PROCESSING
Use of pulsed laser ablation technique for deposition of diamond-like and other special coatings is discussed here at length, establishing the correlation between the process parameters and the film quality. Process parameters dealt with sufficient detail are the laser wavelength, laser pulse width and energy density,…
Frequency dependence of the complex dielectric constant of sodium carboxymethyl cellulose
Abstract The dielectric constant, ε′, and dielectric loss, ε″, were determined for three solid carboxymethyl cellulose samples having different levels of substitution and different degrees of polymerization over a frequency range of 0.1 – 10 000 kHz at temperatures from 10–60°C. In contrast to the two relaxation proce…
Molybdenum and tungsten single crystal alloys with abnormally high creep strength for space nuclear power and propulsion systems
A new class of materials, which basically are single crystal alloys of molybdenum and tungsten, with abnormally high creep strength, is proposed for use. The alloys have a unique and complex properties which permits us to use them successfully as cladding materials for high‐temperature fuel elements, thermionic conver…
Pressurized Flammability Limits of selected Sintered Filter Materials in High-Pressure Gaseous Oxygen
Previous promoted combustion tests have demonstrated that the threshold pressure (the minimum oxygen pressure required to self-sustain combustion) of various engineering alloys is dependent on the configuration of the sample. Monel 400, when configured as a 3.2-mm (0.13-in.) -diameter rod, has a threshold pressu re 50…
Inhibition of the cellulolytic activity of Neocallimastix frontalis by Ruminococcus flavefaciens.
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