Materials Literature
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A formula for the energy corresponding to a potential phi obeying (- Del 2 + kappa 2 ) phi =0 is derived as an expansion in kappa -1 for manifolds with arbitrary smooth boundaries and either Neumann or Dirichlet boundary conditions. The first three terms in the expansion are explicitly determined and they agree with r…
Formation of a hi8hly corrQsion-protective and persistent film on iron with bismuth () chloride in acid solutions has been reporte(1 in Qur previous paper In order to investigate the inhibitiQn mechanism of metall ic corrosion wi th b i smuth (H compounds in ac id solut ions inhibi t ion eff ic i encies of the compoun…
Abstract Epoxy‐terminated poly(aryl ether sulfone)s (PSE) were prepared by the reaction of epichlorohydrin with hydroxyethyl‐terminated polysulfones, which were synthesized from chloro‐terminated polysulfones (PSC) and diethanolamine. Both PSE and PSC were used as modifiers for toughening of bisphenol A diglycidyl eth…
Abstract Atomic oxygen chemisorption has been studied for the fourfold hollow site of the Ni(100) surface and for the threefold hollow site of the Ni(111) surface. To model the Ni(100) surface, 10 different clusters in the range Ni 5 to Ni 41 were used, and for the Ni(111) surface, 11 different clusters in the range N…
Electrically conducting latexes of polypyrrole coated on inorganic cores were obtained by deposition of pyrrole on catalytically active particles. The finely dispersed core materials were hematite (polyhedral and spindle-type), silica coated with hematite, magnetite, and cerium(IV) oxide. The degree of polymer coverag…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Abstract Selective seeding of palladium catalysts on an alumina plate for electroless copper plating was made by photoirradiation. The adsorbed Pd(II)-tartrate were selectively converted to Pd(0) by photoirradiation and the photogenerated Pd(0) catalyzed the electroless copper plating.
Abstract A newly developed roll cladding technique is described in this article. This so called on‐line‐technique allows roll claddings with materials that were not yet considered to be suitable for roll cladding. Herewith it was made possible to successfully produce hot rolled clad plates with base metal RSt 37‐2 and…
In coating and gravure printing, an impinging jet nozzle with high thermal efficiency for drying of coated film was developed. Trial production 0f 40 kinds of nozzle enables to develop a high-performance impinging jet nozzle with heat transfer coefficient 1.5 times larger than that of current slit nozzle, through meas…
Two complementary nondestructive evaluation techniques were used to monitor the fracture processes in unidirectionally fiber-reinforced SCS-6 SiC/Si3N4 ceramic and Nicalon SiC/CAS glass-ceramic matrix composites subjected to tensile loading. The first technique employed a computerized acoustic emission system with res…
An Amoco P55X pitched-based carbon fiber surface was analyzed with both core level and valence band XPS. Compared to Du Pont pitch-based carbon fibers with different modulus and Hercules PAN-based carbon fibers, the P55X fiber had more oxygen content on the surface than the higher modulus, pitch-based carbon fibers (e…
Modeling was carried out on activities of components in the nitric acid-nitrate-water ternary system in order to examine details of the chemical reactions in reprocessing solutions. To modify our earlier “Hydration Model”, the ternary system was regarded as the mixed solution of two kinds of cluster molecules which we…
The ASEA-STORA and Crucible processes make high speed steels that have the advantages of safe heat treatment and easy grinding. Dr P. Hellman, general manager of the HSS Division of ABB Powder-met in Surahammar, Sweden, describes both of these techniques and he compares them to an as-HIPed process for making high spee…
Organic nonlinear optical materials have developed to the point where applications in practical devices may now be contemplated. For second order nonlinear systems, these applications fall into two classes: frequency doubling and electro-optic switching and modulation. Chromophores already exist with values of the sec…
XPS spectra are presented for a thin film of a suboxide of boron formed by condensing B2O2(g) on a clean Ag foil substrate. Spectroscopic characterization of boron suboxides are important as these compounds may exist as surface intermediates in the oxidation of solid boron and of boron compounds. The B2O2(g) source co…
Abstract Wet scrubbing of flue gas to remove sulphur dioxide generates highly corrosive conditions in the operating plant. Conditions in the mixing zone are discussed in detail. Titanium has been evaluated and has been installed as a corrosion resistant liner in several major US plants. Competitive, cost effective ins…
Samples from profiles of 4 Gramusols (Vertisols) and 2 Mediterranean soils (Alfisols) from East Java and 2 each of Red Podzolic and Yellow Podzolic soils (Ultisols) from East Kalimantan have been investigated for the chemical and mineralogical characteristics. The Grumusols were weakly to moderately acid with a 30–40%…
This paper proposes a method using cluster analysis to classify X-ray diffraction lines of a multiphase mixture into different phases. This classification of lines is useful in both qualitative and quantitative phase analysis. An example of a three-phase mixture is given to illustrate this method.
A sui generis second-order transition in water solutions of Rochelle-salt crystal has been seen during measurements of both the solubility and solution densities versus temperature. Both the volume-expansion coefficients and the temperature differential of solution densities for several compositions along the solubili…
Abstract Single crystals and powder samples of Ca 2 Bi 5 O 5 and Ca 4 Bi 6 O 13 have been synthesized and studied using single crystal X-ray diffraction as well as X-ray and neutron powder diffraction. Unit cell dimensions were calculated using a least squares analysis that refined to a δ2 θ of no more than 0.03°. A t…