Materials Literature
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The prediction of core losses in a rotating electrical machine generally requires a numerical approach (finite element or integral method). However, the magnetic characteristics obtained through a standard Epstein facility and inserted in the numerical models predict losses which are quite different from those obtaine…
Several grades of 18% chromium-8% nickel stainless steel (SS) with varying sulfur contents and immersed in 3% sodium chloride (NaCl) demonstrated essentially passive behaviors, with local depassivation events monitored as sharp negative changes in the free corrosion potential. Electrochemical desulfurization or trappi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudy of the Activity and Deactivation of Ni-YSZ Cermet in Dry CH4 Using Temperature-Programmed TechniquesRichard T. Baker and Ian S. MetcalfeCite this: Ind. Eng. Chem. Res. 1995, 34, 5, 1558–1565Publication Date (Print):May 1, 1995Publication History Published online1 May 2…
Abstract 12 bis‐ and tris(maleimide)s were synthesized and characterized and their reactions with polyamides in the melt were examined. It was found that the double bonds of the maleimides react with terminal amino groups of the polyamides to form elastomeric networks. The chemical and physical properties of these ela…
Single phase γ′-Fe4N type (Fe1−xNix)4N compounds (0≤x≤0.6) have been synthesized by heating iron-nickel oxalates under a mixture stream of NH3 and H2. The compounds were investigated by x-ray diffraction and Mössbauer spectroscopy. The results confirm that the lattice constants decrease with increasing content of nick…
The switching behaviour of 1,3,6,8-tetrakis-((S)-2-(heptyloxy)propanoyloxy)pyrene was studied near room temperature in a monotropic columnar phase. The switching angle (optical tilt angle) increases linearly with the applied electric field from 0° to c. ± 10° at ± 0.35°/(V μm −1), then rapidly increases to its upper l…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced Electron Transfer from Eosin and Ethyl Eosin to Fe(CN)63- in AOT Reverse Micelles: Separation of Redox Products by Electron-Transfer-Induced HydrophobicityErnesto Joselevich and Itamar WillnerCite this: J. Phys. Chem. 1995, 99, 18, 6903–6912Publication Date (Pri…
A two-dimensional nonisothermal mathematical model has been developed to simulate a tube-and-shell configuration, catalytic membrane reactor. The three-layer membrane consists of an inert large-pore support, an o2 semipermeable dense perovskite layer and a porous catalytic layer. The model is applied to the simulation…
Abstract Nonisothermal crystallization kinetic data obtained from differential scanning calorimetry (DSC) for a poly(ethylene terephthalate) are corrected for the effects of temperature lag between the DSC sample and furnace using the method of Eder and Janeschitz‐Kriegl which is based on experimental data alone witho…
The adsorption of y-aminopropyltriethoxysilane (y-APS) onto stainless steel substrates has been investigated by Low-Energy Electron Induced X-ray Spectrometry (LEEIXS). Results reported in this work show the influence, on the film thickness, on the one hand, of silane concentration, pH, aging time and alcohol/water ra…
A novel and convenient method of monitoring the internal surface area of a porous silicon layer formed on an n-type substrate has been developed. The technique has been employed during electrochemical growth and subsequent chemical leaching of porous silicon layers in hydrofluoric acid/ethanol. The method involves per…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic versus Antiferromagnetic Exchange in Five Structurally Analogous Carboxylate-Bridged Trinuclear Ferrous ComplexesDavid P. Goldberg, Joshua Telser, Cecilia M. Bastos, and Stephen J. LippardCite this: Inorg. Chem. 1995, 34, 11, 3011–3024Publication Date (Print):M…
Deals with the qualitative and quantitative analysis of the tailorability of lightweight wool fabrics, as well as studies related to the interaction between the ease of tailorability and performance characteristics of wool fabrics. The role of mechanical/physical properties of fabric in the making‐up process as regard…
The phase behavior of the three-component PEO-PPO-PEO/dextradwater system has been studied. Pluronic L64, P105, and F68 were used, and they are members of a family of triblock copolymers with the structure PEO-PPO-PEO, where PEO is poly(ethy1ene oxide) and PPO poly- (propylene oxide). Moreover, these triblock copolyme…
The spatial distribution of backscattered electrons is studied for an Au target with a new Monte Carlo simulation including the discrete energy loss process. The new model is based on the Mott cross section for elastic scattering and the Vriens cross section for inelastic scattering. Some results are compared with the…
The paper describes investigations of the UHF performance of a disc coupler designed for continuous monitoring of partial discharge in gas-insulated substations and indicates how the UHF sensitivity can be improved. Resonant frequencies of the disc are calculated, and the coupler is shown to be most sensitive at these…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical Nonlinearities in AzoarenesI. D. L. Albert, J. O. Morley, and D. PughCite this: J. Phys. Chem. 1995, 99, 20, 8024–8032Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1995https://pubs.acs.org/doi/10.1021/j10002…
Abstract The application of in situ Fourier transform infrared spectroscopy for the study of electrochemical redox reactions of conducting polymers is described. The experimental setup of two different methods, external reflection absorption spectroscopy and attenuated total reflection spectroscopy, is shown. The resu…
In this work we analyse the consequences of relaxing the rotational isomeric state (RIS) approximation in predicting the transitional properties of nematogenic systems formed by two mesogenic moieties linked by a flexible spacer, as in the homologous series of α,ω-bis(4′-cyanobiphenyl-4-yl)alkanes and α,ω-bis(4′-cyano…
Carbon nanotubes (see figure) constitute one of the smallest one‐dimensional and nearly perfect structures available and these materials should exhibit a wide range of interesting properties. Most of these properties, however, will only be of use if te structures can be manipulated into a controlled configuration here…