Materials Literature
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The kinetics of the sorption of molecular hydrogen by ZrCo and Zi0.8Ti0.3Mn1.9 was investigated as function of temperature at several constant pressures of hydrogen. A comparison between the isothermal hydrogen sorption rates by ZrCo, Zr0.8Ti0.3Mn1.9 and LaNi4.7A10.3 is given and reaction mechanisms are discussed. Fro…
The dynamics of the phase of the molecular tilt in the helical ferroelectric liquid crystalline Sm-${\mathit{C}}^{\mathrm{*}}$ phase is studied within the Landau model. We show that a static electric field applied parallel to smectic layers induces a gap in the excitation spectrum of the phase of the tilt at the edge…
Differential anomalous x-ray scattering measurements were made on a well-annealed and a photodarkened amorphous ${\mathrm{As}}_{2}$${\mathrm{S}}_{3}$ film of 4 \ensuremath{\mu}m in thickness as well as on a well-annealed 30 \ensuremath{\mu}m sample, all of which were supported on Si (100) wafers. The thicker sample wa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of iron oxidation at high temperaturesJohn C. Slattery, Kuang-Yao Peng, A. M. Gadalla, and N. GadallaCite this: Ind. Eng. Chem. Res. 1995, 34, 10, 3405–3410Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue 1 Octo…
Air or nitrogen ingress accident scenarios into JET tritium storage containers, filled with uranium or intermetallic compound (IMC) hydrides, are discussed based on the experimentally determined kinetics of the reaction of these hydrides with air, O2 and N2. Reaction of uranium with air can occur at room temperature.…
An investigation was conducted to study the repassivation temperature of a highly alloyed austenitic (UNS S31254) and of a highly alloyed duplex (UNS S32750) stainless steel (SS). When initiated at a high temperature, repassivation occurred at a temperature level significantly lower than normally associated with initi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA mechanistic study of polybenzoxazole formation with model compoundsYing-Hung So, Jerry P. Heeschen, and Cheryl L. MurlickCite this: Macromolecules 1995, 28, 21, 7289–7290Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue…
The distribution of divalent iron and nickel over two metal sites of differing coordination geometry in NiFe 2 (PO 4 ) 2 , sarcopside, has been investigated by resonant X-ray and time-of-flight neutron powder diffraction. To assess the reproducibility of the X-ray technique, data have been collected from instruments X…
<div class="htmlview paragraph">A novel approach was proposed and investigated to reduce unburned hydrocarbon emissions from spark-ignition engines using in-cylinder catalysts. The unburned hydrocarbons in spark-ignition engines arise primarily from sources near the combustion chamber walls, such as flame quench…
During the growth of barrier-type anodic films on aluminium in aqueous electrolytes, electrolyte species, derived from electrolyte anions, are usually incorporated into an essentially alumina film. Here, use has been made of this phenomenon to investigate the behaviour of anions near the film surface that leads to app…
The Peierls-Nabarro model was developed originally to describe core spreading on the slip plane of a dislocation. Screw dislocations have more than one slip plane and are expected to be dissociated into a non-planar fashion conformable to the symmetry about the screw axis. In this work, the Peierls-Nabarro model is ge…
The nature and performance of our patented catalysts, with platinum on carbon and polytetrafluorethylene [ Pt/C/PTFE ] and platinum on styrenedivynilbenzene and polystyrene [Pt/STB/PS], used in a water - hydrogen isotope exchange process are presented.The behaviour of the two catalysts in tritiated water was tested by…
Sorption behavior of tritium to isotropic graphite is discussed including solubility, diffusivity in the bulk of isotropic graphite and sorption capacity of hydrogen isotopes on the surface of isotropic graphite. The solubility and the diffusion coefficient of hydrogen isotopes in the graphite are obtained using the b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb Initio Study of the Strong Binding of BeO to Li, Be, and B Atoms in the Hyperstoichiometric LiOBe, BeOBe, and BeOB MoleculesAlexander I. Boldyrev and Jack SimonsCite this: J. Phys. Chem. 1995, 99, 41, 15041–15045Publication Date (Print):October 1, 1995Publication History…
Short-range order has been investigated in three glasses with composition 0.30MeO·0.35Na2O·0.35P2O5 (Me = Ni, Zn, Cu), which are composed of small, ionic units. X-ray diffraction has been used to study the cation coordination; average coordination numbers turned out to be about 6 for Ni2+, 5 for Cu2+, and 4.5 for Zn…
Abstract When poly(methyl methacrylate) films containing UV absorbers are exposed to UV light, the absorbers undergo photodegradation resulting in loss of absorbance. If the data extend for less than one half‐life, both zero and first order kinetic treatment give fairly linear fits, but the rate constants so derived a…
The structural similarity between Cdx(CN)y and SixOy in the AxBy composition, A taking tetrahedral positions linked successively with B to build up multi-dimensional structures such as 1D-chains, 2D-layers, or 3D-lattices, can be utilized in developing mineral-like but unprecedented inclusion or supramolecular structu…
Abstract Two carbamoyl‐type activators of ε‐caprolactam (CL) anionic polymerization have been used in quasi ‐adiabatic conditions with sodium caprolactamate as initiator, at different concentrations and relative ratios. The reaction products have been characterized in terms of high‐polymer content and extent of crossl…
The dispersion of the spin waves in EuS has been investigated by means of neutron scattering. In zero field and at small momentum transfer q, the energy \ensuremath{\Elzxh}${\mathrm{\ensuremath{\omega}}}_{\mathit{q}}$ of the spin waves is proportional to q in agreement with the predictions of spin-wave theory that inc…
Abstract The atomic structure of the (10 1 2) twin boundary in zinc is investigated theoretically by atomistic calculations and experimentally by high resolution electron microscopy. For computer simulations, the atomic interactions are described by a many‐body potential of the Finnis‐Sinclair type and are applied to…