Materials Literature
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We have grown ultrathin films of layered transition metal dichalcogenides (MoSez,NbSe z ) heteroepitaxially on cleaved faces of mica (muscovite).This is the first success in the heteroepitaxial growth between highly heterogeneous layered materials having different crystal structures and lattice constants that differ b…
The ac impedance of poly-[1-methyl-3-(pyrrol-1-ylmethyl)pyridinium]+(poly-MPMP+) as a function of potential has been investigated in acetonitrile solutions. When the polymer is reduced it acts merely as a barrier to the migration of ions to the double layer of the underlying electrode. Thus the ionic conductivity of t…
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The corrosion of alloy 4130 (UNS(1) G41300) steel has been investigated at temperatures up to 400°F in gaseous environments containing varying amounts of H2S and CO2 and in gas-saturated aqueous environments having dissolved chlorides. Thermogravimetric techniques have been used for establishing the kinetics of corros…
Abstract Nickel in elemental form or alloyed with other metals and materials has made significant contributions to our present-day society and promises to continue to supply materials for a demanding future. This article provides a historical overview and physical metallurgy of nickel and nickel alloys. It lists and d…
Abstract This article discusses the composition, characteristics, and properties of the five groups of wrought stainless steels: martensitic stainless steels, ferritic stainless steels, austenitic stainless steels, duplex stainless steels, and precipitation-hardening stainless steels. The selection of stainless steels…
We present a theoretical and experimental study of amphiphilic particles : these are small solid spheres treated so that one part of the solid is hydrophilic whereas the other is hydrophobic. These beads have a specific behaviour at the interface between two fluids of different polarities since they are anchored at th…
Electronic structure of poly(tetrafluoroethylene) studied by UPS, VUV absorption, and band calculations, Kazuhiko Seki, Hiroshi Tanaka, Toshiaki Ohta, Yuriko Aoki, Akira Imamura, Hitoshi Fujimoto, Hiromichi Yamamoto, Hiroo Inokuchi
A review of capacitor fundamentals and technology that is intended for the clarification of the modes of operation of the broad spectrum of capacitors, including paper/polymeric films, electrolytics, and ceramics, is presented. How each class of capacitor performs in both low- and high-power electronics is discussed i…
Methods of dealing with reversible magnetization in the context of Preisach modeling are examined. A generalization of the vector product model which includes reversible effects, as well as the usual irreversible effects, is presented.>
The trinuclear copper(II) complexes [Cu3(OH)(pz)3(Hpz)2Cl2]·solv (Hpz = pyrazole, pz = pyrazolate anion, solv = H2O or tetrahydrofuran) have been obtained by oxidation reactions of [{Cu(Hpz)2Cl}2]. When treated with pyridine(py), both CuII derivatives gave the related compound [Cu3(OH)(pz)3-(py)2Cl2]·py, which has bee…
Loose particles and discharges inside the ducts of a gas-insulated substation (GIS) are considered hazardous to the insulation system. These irregularities or flaws can be detected by using acoustic sensors placed on the enclosure. An elementary review of sound propagation in a GIS together with corresponding experime…
A critical review is given on self-diffusion, impurity diffusion, chemical diffusion, thermal diffusion and radiation-enhanced diffusion in the ceramic nuclear fuels, i.e. oxides, carbides, nitrides and carbonitrides of uranium and plutonium. Atomic transport in ThO2 is also discussed. Besides experimental results on…
Chromogenic materials have optical properties that can be changed in a persistent and reversible manner under the action of an external stimulus. They can regulate the throughput of radiant energy between widely separated extrema, and hence they can be used in future “smart windows” in buildings, cars, etc., and for m…
Abstract Detailed sedimentological and geochemical studies of phosphorites and sediments from the East Australian continental margin have shown that both apatite and glauconite are forming at a transition zone between relict, iron oxyhydroxide-rich, organic-poor (TOC<0.3%) outer shelf (200–350 m) sediments and relativ…
The development of a graphical simulation to describe the draping of bidirectional fabrics over arbitrary surfaces is reported. The simulation applies to any surface, described either analytically or numerically, and allows any number of draped configurations on a surface. A unique draped configuration results when on…
Abstract Steam explosion treatment was carried out on almost pure natural celluloses (wood pulps and purified cotton linter) to obtain alkali‐soluble cellulose and to clarify the effect of cellulose resources on the changes in morphology, viscosity‐average degree of polymerisation P v , solubility towards aqueous alka…
Most BO 4 -groups deviate significantly from a regular tetrahedron with symmetry [unk]3 m - T d . The geometry of these deviations and the extent of the distortions are the main topics of this study. The shapes of 256 borate groups in 128 compounds have been investigated. In BO 3 -groups with O … BO 3 distances shorte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of electron tracks in water. 1. Distribution of energy deposition eventsSimon M. Pimblott, Jay A. LaVerne, A. Mozumder, and Nicholas J. B. GreenCite this: J. Phys. Chem. 1990, 94, 1, 488–495Publication Date (Print):January 1, 1990Publication History Published onlin…
Copper oxide was deposited on gamma alumina with loadings between 2.1 and 9.2 wt % of CuO. The activity of these solids was measured in the catalytic combustion of methane before and after an aging test performed at 1340 K. The state and the environment of the copper species was followed by UV–VIS reflectance spectros…