Materials Literature
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The prediction of iron losses in magnetic steels submitted to alternating pulse voltages is studied and an efficient method is proposed. It is developed by coupling the pulse voltage form factor and the loss separation model. Prediction of iron losses becomes possible directly from the loss model corresponding to the…
The magnetic field effect is considered on the solid-melt phase transformations. Using the thermodynamic method it has been shown that an external magnetic field may observably influence the parameters of the equilibrium solid-melt phase transformations.>
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTin Porphyrins. 6. Tin-119 Chemical Shifts and Line Widths of Tin(IV) Complexes of Tetraphenyl-, Tetra-p-tolyl-, and OctaethylporphyrinDennis P. Arnold and John P. BartleyCite this: Inorg. Chem. 1994, 33, 7, 1486–1490Publication Date (Print):March 1, 1994Publication History…
Abstract Soils with bisequel morphology and classified as Typic or Plinthic Paleudults are common in the Virginia Valley and Ridge Province. Horizons in the older materials have redoximorphic features that are strongly contrasting with respect to color and distinctness of boundary. Research documenting these horizons…
We review the focusing properties of a general planesymmetric dispersive system containing a varied line-space (VLS) grating as its dispersive element. A VLS grating is one whose grooves are straight and parallel (when viewed looking down the grating normal) but unequally spaced. Aberration terms for VLS gratings are…
Summary The contrast thicknesses ( x k ) of thin carbon and platinum films have been measured in the transmission mode of a low‐voltage scanning electron microscope for apertures of 40 and 100 mrad and electron energies ( E ) between 1 and 30 keV. The measured values overlap with those previously measured for E (≥ 17k…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT77Se Solid-State NMR Studies of [M(Se4)2]2- Anions (M = Zn, Cd, Hg)Patrick J. Barrie, Robin J. H. Clark, Robert Withnall, Duck-Young Chung, Kang-Woo Kim, and Mercouri G. KanatzidisCite this: Inorg. Chem. 1994, 33, 6, 1212–1216Publication Date (Print):March 1, 1994Publication…
New hydrated iron‐substituted nickel hydroxides obtained either by precipitation (α) or by chimie douce (α * ) have been tested as positive electrode materials in Ni/Cd cells. The γ/α system is completely stabilized during long‐term electrochemical cycling as a result of the stability of the Fe 3+ ions in the reduced…
3-Carboxy-cis,cis-muconate lactonizing enzyme (CMLE; EC 5.5.1.5) from Neurospora crassa catalyzes the reversible gamma-lactonization of 3-carboxy-cis,cis-muconate by a syn-1,2 addition-elimination reaction. The stereochemical and regiochemical course of the reaction is (i) opposite that of CMLE from Pseudomonas putida…
Thermal decomposition behaviour of single and mixed blowing agents formulations based on azodicarbonamide (ADC) were investigated. It was shown that the addition of an auxiliary blowing agent 4,4'oxybisbenzenesulfonylhydrazide (OBSH) with decomposition behaviour complimentary to the main blowing agent (activated ADC)…
Abstract Pr(CH 3 COO) 3 entsteht beim Entwässern von Pr(CH 3 COO) 3 · 1,5 H 2 O bei 180°C als amorphes Pulver. Einkristalle konnten daraus mit Hilfe von (NH 4 )CH 3 COO als „Mineralisator”︁ ebenfalls bei 180°C in einer geschlossenen Glasampulle gezüchtet werden. Die Kristallstruktur (tetragonal, P 4 2 1 c (Nr. 114), Z…
Corrosion behavior of three aluminum-lithium (Al-Li) alloys was investigated in aerated 0.5 M sodium sulfate (Na2SO4), deaerated 3.5% sodium chloride (NaCI), and aerated 3.5% NaCI. Corrosion behavior of the Aluminum Association (AA) alloys 2090-T8E41 (UNS A92090, sheet), AA 8090-T851 (UNS A98090, sheet), and AA 8090-T…
Abstract Increasing and constant temperature gravimetric methods were used to measure the thermal decomposition rates of Mg(OH) 2 particles. An Arrhenius‐type kinetic equation was proposed and tested. Temperature, exposure time on surface area of the calcined particles and other effects of variables were explored. A f…
Al-Zr alloy thin films are prepared via alternate sputtering deposition. The as prepared films exhibit metastable phases including amorphous, cubic ZrAl3(L12), supersaturated Al-in-Zr close-packed hexagonal structures, and Zr-in-Al face-centered cubic solid solutions with uniform composition distribution. The amorphou…
A study of thread tensions on a lockstitch sewing machine was made, measuring simultaneously both the needle and bobbin thread tensions. Experiments were carried out under specified sewing conditions, whereby needle and bobbin thread tensioner adjustment, sewing speed, number of plies, fabric quality and sewing thread…
Abstract After a general introduction including definition of biodegradability, the recent literature is briefly summarized. The results obtained in our laboratory for various polymers in three different composting units are then presented. They demonstrate that there is an urgent need for a quantitative method to cha…
Slow strain rate tests (SSRT) were conducted in solutions of hydrochloric acid (HCl) + sodium chloride (NaCl) at ambient temperature on type 304 (UNS S30400) stainless steel (SS) weldments that exhibited a duplex ferrite-austenite structure in the weld fusion zone. Results indicated the weld fusion zone corroded prefe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid Crystalline Fluorocarbon Side-Chain PolyestersL. M. Wilson and A. C. GriffinCite this: Macromolecules 1994, 27, 7, 1928–1931Publication Date (Print):March 1, 1994Publication History Published online1 May 2002Published inissue 1 March 1994https://pubs.acs.org/doi/10.10…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Structure of the Oxygen-Deficient Perovskite YBaCuFeO5+.delta.Alvaro W. Mombru, Christos Christides, Alexandros Lappas, Kosmas Prassides, M. Pissas, C. Mitros, and D. NiarchosCite this: Inorg. Chem. 1994, 33, 7, 1255–1258Publication Date (Print):March 1, 1994Publica…
An optimised set of thermodynamic functions consistent with the phase diagram was derived for the Fe-Nb system from information on phase equilibria and thermodynamic data available in the literature. The thermodynamic properties of the intermediate e (Fe 2 Nb) phase were described using the sublattice model. A Redlich…