Materials Literature
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Abstract This paper discusses the electrochemical behavior and corrosivity of aqueous sulfidic solutions with reference to iron and carbon steel. The chemistry of aqueous sulfidic solutions is reviewed with particular emphasis on stability of various sulfur species in aqueous solutions as a function of pH and solution…
Changes in a domain's geometry can force striking changes in the capillary surface lying above it. Concus and Finn [1] first studied capillary surfaces above domains with corners, in the presence of gravity. Above a corner with interior angle satisfying < -2, they showed that a capillary surface making contact angle w…
The accurate measurement of optical birefringence at simultaneous high pressures and temperatures using a diamond-anvil pressure cell is described. Data are presented for BiVO4 which show that the optical birefringence may be described by mean-field behaviour. An applied hydrostatic pressure of only 8 × 108 Pa reduces…
High-temperature phase-boundary sliding has been studied by simple shear creep tests in two-phase (α/β)-brass bicrystals obtained by diffusion in the solid state. The constitutive law obtained is of the form σ∼ τn in which the exponent n is equal to 1 for low stresses and to 2 for stresses greater than a limiting valu…
Abstract Synergism in poly(vinyl chloride) stabilization was studied by the determination of the dynamic and static stability of 34 different formulations. Nine ratios of Ca/Zn stearate were tested. Both the static and the dynamic stability increased almost linearly with the calcium stearate content, but unfortunately…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced elimination of molecular hydrogen from [MoH4(diphos)2] and [MoH4(PPh2Me)4]Ronald Pierantozzi and Gregory L. GeoffroyCite this: Inorg. Chem. 1980, 19, 6, 1821–1822Publication Date (Print):June 1, 1980Publication History Published online1 May 2002Published inissue…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStable single-compartment vesicles with zwitterionic amphiphile involving an amino acid residueYukito Murakami, Akio Nakano, and Kiyoshi FukuyaCite this: J. Am. Chem. Soc. 1980, 102, 12, 4253–4254Publication Date (Print):June 1, 1980Publication History Published online1 May…
Abstract Research on the Raman spectrum shows that the features of the different phases of which semi‐crystalline polyethylene is composed can be obtained through bending vibrations of δ (CH 2 ).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic studies on monomeric and dimeric iron porphyrinsK. M. Kadish, L. A. Bottomley, J. G. Brace, and N. WinogradCite this: J. Am. Chem. Soc. 1980, 102, 13, 4341–4344Publication Date (Print):June 1, 1980Publication History Published online1 May 20…
Anodic oxide films formed on nickel in p H 7.65 borate buffer solution in both the passive potential and oxygen evolution regions have been analyzed by RHEED, Auger spectroscopy (in conjunction with argon ion sputtering), and O x‐ray emission spectroscopy. In the passive potential region, a highly epitaxed, single cry…
By means of nonlocal elasticity theory, the Griffith crack problem is solved to determine the state of stress in a plate weakened by a line crack. The maximum stress is found to be finite and occurs away from the crack tip. Cohesive stress is estimated and compared with the calculations based on atomic lattice theory.…
Abstract The intensity of the glass transition in semicrystalline polycarbonate was measured by differential scanning calorimetry and by thermally stimulated discharge of electrets. Solution‐cast and bulk‐crystallized samples possessing widely varying crystallinities and morphologies were investigated. It is shown tha…
Raman spectra of amorphous As x Se 1- x system (0≤ x ≤0.5) were measured and the spectra were interpreted with the molecular model of Lucovsky and Martin. In the Se-rich region the observed Raman spectra are well reproduced by the superposition of the Raman intensity of pure Se, As 2 Se 3 and As 2 Se 4 in proportion t…
The penetration of a thin plate from the side by a sharp rigid wedge is considered. A formula is proposed which expresses the external work done in terms of the depth of penetration and the wedge angle. The external work is decomposed into two parts: a part related to the length of cut plate and a part related to the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron exchange kinetics of [Fe4S4(SR)4]2-/[Fe4S4(SR)4]3- and [Fe4Se4(SR)4]2-/[Fe4Se4(SR)4]3- systems. Estimates of the intrinsic self-exchange rate constant of 4-Fe sites in oxidized and reduced ferredoxinsJohn G. Reynolds, Catherine L. Coyle, and R. H. HolmCite this: J.…
Abstract X‐ray photoelectron spectroscopy (XPS) has been used to study the chemical modification of low density polyethylene, high density polyethylene and polypropylene using a very mild treatment with chromic‐sulphuric acid or treatment with concentrated sulphuric acid. The treatment of low density polyethylene with…
Polycrystalline Si films with average grain sizes of ∼8 μm have been grown by laser-induced chemical vapor deposition from SiCl4. A cw CO2 laser operated at 10.6 μm was used to provide local heating of quartz substrates in an otherwise cool reactor to initiate the endothermic decomposition reaction. Deposition rates o…
Anodic polarization studies have been conducted in an aqueous solution of , at 92°C, and compared with studies in . Anodic films were examined by electron diffraction and x‐ray energy analysis and all results compared with published data on and equilibria. In particular, it was concluded that the delay of passivity in…
Ruthenium(II) phthalocyanine complexes of the type RuPcL 2 (Pc = the phthalocyaninato dianion, L = various pyridines, imidazole, dimethylformamide, dimethylsulfoxide, and acetonitrile) may be prepared generally in solution by photolysis of RuPc(CO)L′ complexes in the presence of excess L (L′ may be the same as L or ma…
Abstract A small‐angle x‐ray scattering (SAXS) investigation of two linear segmented polyurethanes was carried out to learn about the respective domain structure (morphology). Both urethanes had a hard segment of methylene‐ bis (4)phenyl isocyanate (MDI) and butanediol. These two components comprised 28% by weight of…