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Void ordering in metals during irradiation

Evans (1971) has reported that voids produced by irradiation could form into three-dimensional arrays. Since then void lattices have been observed in a number of metals, for example, Mo, W, Nb, Ta, Al and Ni. In all these metals the pattern of ordering shows many similarities. A number of theories have been proposed t…

A generalization of the Rayleigh–Plesset equation of bubble dynamics

The classical Rayleigh-Plesset equation of spherical bubble dynamics in an incompressible liquid is generalized to include the non-Newtonian behavior of the liquid and mass exchange processes at the bubble interface.

Reaction Rate Studies for the Corrosion of Metals in Acids—I, Iron in Mineral Acids

A detailed kinetic study of corrosion reactions of iron In HCl, H2SO4, and H3PO4 is made by a modified version of the gasometric technique. Reaction rates are measured at different temperatures. Curves drawn for reaction rates led to the development of a new kinetic expression, viz, rate = A eBC e−E/RT, where C is the…

Microstructures of precipitation-hardened SmCo permanent magnets

The microstructural features of isothermally aged and step aged and isothermally aged Sm(Co, Cu ,Fe, Zr)7.4 alloys are examined using electron microscopy and x-ray microanalysis. The microstructure is seen to consist of a cellular morphology with twinned rhombohedral 2:17 phase cell interiors, 1:5 phase cell boundarie…

Functional Properties of Chitin and Chitosan

ABSTRACT Chitin (poly‐β (1⇒4)‐N‐acetyl‐D‐glucosamine), chitosan (deacetylated chitin) and microcrystalline chitin (redispersible chitin powder) were compared with microcrystalline cellulose to examine the use of those cellulose‐like biopolymers as functional additives for potential application in food formulations. Wa…

Coordination Compounds of Porphyrins and Phthalocyanines

ADVERTISEMENT RETURN TO ISSUEPREVArticleCoordination Compounds of Porphyrins and PhthalocyaninesKevin SmithCite this: Organometallics 1982, 1, 3, 570Publication Date (Print):March 1, 1982Publication History Published online7 January 2004Published inissue 1 March 1982https://pubs.acs.org/doi/10.1021/om00063a904https://…

The effects of proteins on metallic corrosion

The corrosion of the pure metals aluminium, cobalt, copper, chromium, molybdenum, nickel, and titanium and of a cobalt-chromium molybdenum casting alloy has been studied in buffered saline with and without the presence of the proteins serum albumin and fibrinogen. The corrosion of aluminium and titanium was unaffected…

Transients of monolithic catalytic converters. Response to step changes in feedstream temperature as related to controlling automobile emissions

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransients of monolithic catalytic converters. Response to step changes in feedstream temperature as related to controlling automobile emissionsSe H. Oh and James C. CavendishCite this: Ind. Eng. Chem. Prod. Res. Dev. 1982, 21, 1, 29–37Publication Date (Print):March 1, 1982P…

On the rotation-inversion controversy on photoisomerization of azobenzenes. Experimental proof of inversion

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the rotation-inversion controversy on photoisomerization of azobenzenes. Experimental proof of inversionHermann Rau and Erik LueddeckeCite this: J. Am. Chem. Soc. 1982, 104, 6, 1616–1620Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Pu…

Influence of molecular weight and molecular weight distribution on mechanical properties of polymers

Abstract This work reviews the literature published over the last ten years on polymer mechanical properties as a function of molecular weight and molecular weight distribution, Thermal properties, stress‐strain properties, impact, fracture, fatigue, creep, stress relaxation and cracking and crazing are examined for a…

Enthalpy and Heat-Capacity Standard Reference Material: Synthetic Sapphire (Alpha-Al2O3) From 10 to 2250 K

Heretofore unpublished enthalpy data which were used in the derivation of smooth enthalpy and heat-.capacity data for NBS SRM 720 (a-A1, 2 0, heat capacity and enthalpy standard) are presented along with some details of the high-temperature experiments. Recent NBS low-temperature measurements on SRM 720 are smoothed b…

The Electron–Phonon Interaction in Metals

Göran Grimvall 1981 Amsterdam: North–Holland xiv + 304 pp price Dfl125 This book is a very concise account of the electron–phonon interaction, guiding the reader through a wide range of formulae and results. The author starts off with the origin of electron–phonon scattering, discusses ways of calculating the interact…

Thermoelastic action of pulse-periodic laser radiation on the surface of a solid

An analysis is made of the thermoelastic action of high-power pulse-periodic laser radiation on the surface of a solid. The analysis is made using relationships, similar to Duhamel integrals, between the characteristics of the thermally stressed state on exposure to cw and arbitrarily time-varying laser radiation. Cal…

Influence of Ring Size on Properties and Reactivity of Cyclic Systems

Results obtained during 1960–1979 on the effect of the size of a saturated or partly hydrogenated carbo- or hetero-cycle on the physicochemical (spectral, polarographic, ionisation) and chemical properties of cyclic compounds are summarised. Attention is paid mainly to the usual (C5–C7) cyclic systems. Results are int…

Symmetry dependence of optical transitions in group 4B transition metal dichalcogenides

Near-normal-incidence reflectivity measurements have been made over the energy range 0.5 to 5 eV at room temperature and 77K for the following layered materials: TiS2, TiSe2, ZrS2, HfSe2 and HfTe2. Both freshly cleaved basal planes (E perpendicular to c; k//c) and as-grown edge planes (E perpendicular to c, E//c; k pe…

<title>Nitrogen-Stabilized Aluminum Oxide Spinel (ALON)</title>

A new ceramic, nitrogen-stabilized aluminum oxide spinel (ALON), has been developed at AMMRC which may have distinct advantages over sintered polycrystalline a-A1₂0₃. This material is isotropic and has been fabricated into dense, transparent bodies with the following properties: Knoop (100) hardn…

<title>Infrared Transmitting Germanate Glasses</title>

The infrared cut-off of glasses is primarily determined by the frequency of vibration of the cation-anion bonds. In order to extend infrared transmittance to longer wavelengths cations and anions of larger sizes and lower field strengths should be used; however, physical and chemical properties become poorer. For sili…

Site-Specific Valence Determination by Electron Energy-Loss Spectroscopy

The valence of an atom occupying a particular crystal lattice site can be determined from the chemical shift in a transmission electron energy-loss spectrum obtained with the intensity of the incident electron wave maximized at that site by dynamical electron diffraction. The new technique is demonstrated by determini…

High-Resolution Laser-Pulse Method for Measuring Charge Distributions in Dielectrics

A laser-induced pressure-pulse method for measuring the charge distribution in (10 to 100 \ensuremath{\mu}m thick) dielectric samples with a resolution of about 4 \ensuremath{\mu} m is described. A short ( ns) energetic light pulse from a neodymium-doped yttrium aluminum garnet laser is applied to a specially coated s…