Materials Literature
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This study investigates the effects of partial flow blockage due to ballooning of fuel cladding on the core heat transfer during reflood phase in a PWR loss-of-coolant accident, in particular, the effects of coolant bypass flow at flow blockage and the effects of major parameters in a wide core with a bundlewise flow…
The system of electron currents in the specimen chamber of a scanning microscope is analysed in detail for specimens of gold and aluminium. General conclusions are drawn about the magnitudes of the component currents for other types of specimen. Measurements of the efficiency of collection of electrons by the scintill…
Refractory oxide films of Al2O3, SiO2, MgO, and Al2MgO4 have been grown in a molecular beam epitaxy (MBE) system using As2O3 and Sb2O3 as the oxygen source. On the growth surface, elements such as Al whose oxide is more stable than the group V oxide will reduce the group V oxide and form a refractory oxide. With the g…
The reaction of carbon with hydrogen to form methane in the presence of platinum particles is studied. Kinetics studies are combined with TEM techniques that allow particle shape and structure to be obtained. The methane production has two peaks at 800 and 950 °C. The reaction always involves pitting or channeling by…
The design and use of a simple, robust and sensitive vibrating sample magnetometer (VSM) is outlined. Magnetic data are presented for various classes of magnetic materials, ranging from paramagnetics to ferromagnetics. In its simplest form the VSM requires only a digital voltmeter for signal analysis. Thus it is ideal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of thermal regeneration of fibrous diesel-particulate filtersFarhang Shadman and Edward J. BissettCite this: Ind. Eng. Chem. Process Des. Dev. 1983, 22, 2, 203–208Publication Date (Print):April 1, 1983Publication History Published online1 May 2002Published inissue 1…
The kinetics of the electrochemical insertion of lithium into sodium tungsten bronzes, to form the mixed alkali bronzes, have been studied, using transient techniques. The chemical diffusion coefficient of Li in single crystal samples was found to decrease with increasing lithium and sodium concentrations from initial…
Styrene was copolymerized with 2,3-dibromopropyl acrylate, 2,4,6-tribromophenyl acrylate, or pentabromophenyl acrylate in either aqueous emulsion, dimethylformamide, or benzene solutions with a free radical initiator, and the thermal and flammability properties of the resulting polymers are described. The reactivity r…
CuX ( X = Cl or Br ) is formed during the galvanostatic pulse plating of copper from acid solutions containing Cu 2+ and X − . The reaction Cu 2 + + Cu 0 + 2 X − → 2 CuX occurs in the relaxation period of the pulse. Copper (I) chloride anodes for reserve seawater batteries may be made by this method. CuBr is oriented…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsomeric bis[(phenylazo)acetaldoximato]platinum(II) compoundsDebkumar Bandyopadhyay, Pinaki Bandyopadhyay, Animesh Chakravorty, F. Albert Cotton, and Larry R. FalvelloCite this: Inorg. Chem. 1983, 22, 9, 1315–1321Publication Date (Print):April 1, 1983Publication History Publ…
The influence of temperature and associated dislocation microstructure on the energetics of basal plane cleavage in zinc crystals has been investigated using the method of Hull, Beardmore, and Valentine (HBV). A marked temperature dependence was observed in the zinc surface energy, over the range 77–298 °K, contrary t…
The electrical conductivity of single crystalline SrTi 1- x V x O 3 (0.1≦ x ≦1) was measured down to 4.2 K. The depth of the donor level of V 4+ in SrTiO 3 was about 0.6 eV. The metal-nonmetal transition occurred at x ≃0.6 with σ≃280 Ω -1 cm -1 and the conductivity increased with x up to about 2×10 4 Ω -1 cm -1 at x =…
The reactions of 1-lithioalkoxyethylenes with hexafluorocyclotriphosphazene (N3P3F6) have been examined. In contrast to similar reactions of propenyl lithium with N3P3F6, no evidence for degradation reactions via anionic attack on the olefinic center was observed and the reaction proceeds smoothly to yield N3P3F6-N (C…
The extent of oxygen diffusion in oxide scales formed on metals during high-temperature oxidation can be studied by sequential oxidation in 16O2 and 18O2 followed by SIMS profiling. Previously, 16O− and 18O− profiles have been used to examine oxygen penetration, but the analysis is limited in its ability to quantify d…
Abstract Measurements of the differential heats of K-Ca exchange are used to show that 6 groups of sites (ranging from −13.8 to −5.1 kJ/eq and with as many as 4 in any one sample) exist in kaolins that range from 0 to 15% in their 2:1 phyllosillicate content. These heat values, coupled with entropies of exchange, sugg…
A simple model is proposed to account for the influence of the β-phase atomic order on the martensitic transformation undergone by shape-memory alloys. The dependence of the elastic constants of the high-temperature phase on atomic order is calculated within the harmonic approximation, giving rise to a coupling betwee…
As the noble gases play a major role in establishing the interconnection of escape routes from the interior to the exterior of nuclear reactor fuel, a realistic description of the release of volatile fission products (VFPs) must a priori include a realistic description of fission gas release and swelling. In addition,…
An interactive Fortran IV program is described which allows the orientation matrix of a crystal to be determined and refined without ambiguity, from a transmission or reflection Laue photograph. The indexing method is that of Riquet & Bonnet [ J. Appl. Cryst. (1979), 12 , 39–41] applied to a small number of data (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of organomolybdenum compounds. 2. Synthesis, structure and properties of dioxodineopentyl(2,2'-bipyridyl)molybdenum(VI) and of related compoundsFred Ross, Dawn Ross, Elmer O. Schlemper, Gerard Schrauzer, Laura Hughes, and Norman StrampachCite this: Organometallics 19…
Power transformer availability and utilization are key factors in overall transmission system availability and utilization. A Microprocessor based Transformer Analysis System (MTAS) has been conceptually configured to provide improved power transformer availability and utilization through the continuous monitoring and…