Materials Literature
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Unexpected brittle failures of UNS N05500 drill string parts and nonmagnetic drill collars have recently been observed in cases where the UNS N05500 components were galvanically coupled to carbon steel in concentrated salt solutions at temperatures between ambient and higher than 373 K (100 C). Cracking occurred prefe…
Abstract PVC films and films containing the modifying copolymers, irradiated by increasing dose of UV‐radiation of λ = 253.7 nm were investigated. It was previously stated 1–3 that 1–10% content of modifying copolymers in PVC films distinctly change the resistance of PVC to UV‐radiation and this is the cause that phot…
The interaction of sodium polysulfides and candidate metals for the current collector and cell casing in sodium/sulfur cells at 300° and 350°C is explored using cyclic voltammetry. The metals investigated are chromium and molybdenum, and data for voltammetric sweeps at rates of 10–500 mV/s in are reported. The results…
Large components manufactured from Cr–Mo–Ni low-alloy steels are usually heavily tempered for the purpose of stress relieving, with resultant undesirable loss of strength and the inception of upper-nose temper embrittlement (UNTE). This paper describes an investigation on the effects of vanadium additions and of varia…
The freely expanding ring test (ERT) is a conceptually simple test for determining the stress-strain behavior of materials at large strains and at high strain rates. This test is conducted by placing a thin ring of test material in a state of uniform radial expansion and then measuring its subsequent velocity-time his…
Cooper minima are known to profoundly affect photoionisation cross sections. They become particularly important in high-Z atoms where relativistic effects split each nonrelativistic Cooper minimum into three minima (two for s states). In addition, there are significant splittings in these 'triplets'. In this paper, th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular environment effects on the reactivity of porphyrins. Influence of basket-handle superstructures on the formation of five-coordinated complexes of iron(II) with neutral nitrogen basesDoris. Lexa, Michel. Momenteau, Jean Michel. Saveant, and Feng. XuCite this: J. Am.…
Abstract The mechanism of craze initiation and growth and its relationship to mechanical properties has been studied in thin films of styrene–butadiene–styrene (SBS) block copolymers. Optical microscopy and transmission electron microscopy were used to examine three copolymers which has a spherical rubber domain morph…
Zinc phosphide (Zn3P2) thin films have been deposited by hot-wall deposition technique on glass substrate, and the deposition behaviors as well as structural properties of deposited films are studied. The source temperature and the temperature difference between source and substrate mainly affect the growth rate. Scan…
The related phenomena of biocompatibility and biodegradation are of major concern in the selection of synthetic polymers for use as implantable biomedical devices. These properties are largely determined by the consequences of the cellular interactions that occur at the polymer/tissue interface during inflammation. Us…
Comparative testing of cold worked AISI type 304 austenitic stainless steel in mode I and mode III under conditions of cathodic charging and chloride stress corrosion cracking (SCC) has been used to assess the role of hydrogen in SCC. The experimental results of these tests and those previously published have been use…
Abstract A physical model of the growth of chemically related failures in electronic components is developed. This model is used to demonstrate that time to failure is as much a function of the component geometry as it is of the activation energy of the reaction. Further interpretation suggests that for any specified…
Abstract Microprobe analyses of optically homogeneous detrital biotites from sandstones of the Visingsö Group and the Dala Sandstone, Sweden, revealed a consistently low K content (generally <0.75 atom/formula unit) and variable amounts of Fe, Mg, Al, and Si. Electron probe profiles of some biotite grains indicated…
The short- and long-range spin correlations in the quasi-one-dimensional S=(1/2) system (${\mathrm{C}}_{6}$${\mathrm{D}}_{11}$${\mathrm{ND}}_{3}$)${\mathrm{CuBr}}_{3}$ (CHAB-D14) have been investigated by (quasi) elastic neutron scattering experiments. The temperature dependence of the sublattice magnetization below $…
In order to stimulate further thought and research within the science of dielectrics, this paper discusses the remarkable correlation between acoustic theory and the physics of electrical breakdown in dielectrics. Following a brief, simplified fied review of acoustic theory and the propagation and attenuation ation of…
Ytterbium-DTPA was evaluated as a potential intravascular contrast agent. Ytterbium-DTPA was synthesized from ytterbium oxide and diethylene triamine penta-acetic acid (DTPA). CT scans of increasing concentrations of ytterbium and iodine showed that at 125 kVp, ytterbium was denser than an equal concentration of iodin…
Abstract By impregnating cotton fiber with alkaline swelling agents and reacting with some chemical agents which can be substituted for the hydroxyl groups on cellulose molecules in the presence of alkali, highly accessible or decrystallized cotton fibers can be obtained. As the effective substitution reactions, acety…
Although monolithic ceramic materials have been widely used in the past in nonstructural applications - such as electrical insulators, crucibles, microwave windows, and pump and valve components for the chemical industry - it has been only in recent times that major efforts have been made to use ceramics in structural…
Abstract Polymers with different compositions of vinyl alcohol and vinyl acetate units (P(VA‐VAc)), obtained by alcoholysis of poly(vinyl acetate) with sodium methoxide, were mixed with poly( N ‐vinyl‐2‐pyrrolidone) (PVP). The miscibility was studied observing glass transition temperatures by differential scanning cal…
The Garton effect has been observed in PET films in the low-frequency range from 0.0003 to 0.1 Hz. The current wave manifests a remarkable deformation which depends on the temperature, the applied voltage, the frequency and the sample thickness. Tan delta evaluated from the power loss decreases with the increase in ap…