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The supercooling and freezing of a restricted liquid has been studied by the probing of its molecular dynamics with picosecond optical techniques. A newly developed transparent porous host material makes it possible to study the liquid viscosity as a function of the confining pore radius and temperature. The observed…
bcc crystalline colloidal microsphere suspensions are shear melted into the metastable liquid phase. Recrystallization occurs via nucleation and growth of single crystallites at dilute sites. The nearly spherical growing crystals have rough interfaces with a time-independent interface velocity, $v$. The velocity is fo…
Transmission electron micrographs of individual mineralized collagen fibrils show that hydroxyapatite crystals are located mainly within the fibrils at the level of the gap regions. The plate-shaped crystals are observed to be more or less uniformly stacked across the fibril diameter. We therefore suggest that the cry…
Abstract Sulfenamide‐accelerated sulfur vulcanization of natural rubber/chlorobutyl rubber compounds has been investigated at temperatures from 155 to 175°C over 0.1 to 400 min. Continuous measurements in a Cone Rheometer were used to estimate the extent of crosslinking, which was plotted against cure time. On the bas…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text P. A. Greet, "Coating stress in Fabry-Perot etalons," Appl. Opt. 25, 3328-3330 (1986) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation ale…
KEYWORDS: chemical kineticscladdingoxidationsevere accidentSFDsteam starvationtemperature dependencetime dependencevery high temperatureZircaloy 4
We studied the effect of long-term (40 yr), intensive cultivation and irrigation on soil properties in the Jordan Valley, Israel, which had experienced declining crop yields. Three cultivated soil pedons and an equivalent undisturbed soil from the same site were analyzed for several soil properties. The major differen…
The vapor pressures over vanadium-oxygen solid solution (0.001≦O/V≦0.145) were measured by mass-spectrometric method in the temperature range of 1,855–2,117K. The main vapor species were observed to be V(g) and VO(g). The vapor pressure of V(g) is higher than that of VO(g) over the solid solutions with all O/V ratios…
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…