Materials Literature
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The effect of both compressive and tensile stresses of up to 500lbf/in2 at various temperatures in the range 20–400°C on the power loss, coercive force and remanence of two grades of grain-oriented 3% silicon iron has been measured at 50c/s. Increasing tension at first reduces the power loss and the coercive force, bu…
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Internal deformation and fracture of second order /1011/-/1012/ twins in Mg single crystals, noting large strains
The absorption spectra for single crystal and polyerystalline UO2 have been measured between 0.6 and 15 μm at room temperature. The spectrum for UO2 resembles that of a typical semiconductor, opaque in the visible but transparent over a large portion of the infrared. An absorption edge is located at approximately 0.6…
Oxygen pressures of the pyrolusite form of MnO 2 have been determined in a temperature range of 441°–642°C. The dissociation reaction 4 MnO 2 ( c ) ⇄ 2 Mn 2 O 3 ( c ) + O 2 ( g ) has been found to reach a steady state in the forward direction; reaction in the reverse direction was exceedingly slow and did not reach a…
T. M. Connor, D. J. Blears and G. Allen, Trans. Faraday Soc., 1965, 61, 1097 DOI: 10.1039/TF9656101097
ADVERTISEMENT RETURN TO ISSUEPREVArticleInteraction of Alkali Metal Cations with Silica Gel1H. Ti TienCite this: J. Phys. Chem. 1965, 69, 1, 350–352Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published inissue 1 January 1965https://pubs.acs.org/doi/10.1021/j100885a508https://d…
The effect of high direct voltage on the formation and dislodging of water drops hanging from a smooth conductor will be shown and used to explain the resulting corona characteristics, such as pulse amplitude and repetition rate, audible noise, radio influence (RI) and loss current, and corona current waveforms. Pheno…
Abstract Mises' yield criterion, the Prandtl‐Reuss relation between stress and plastic strain rate, and Hencky's theorem on shear lines for isotropic elastic‐plastic materials are derived from the theory of continuous distributions of dislocations. A linear relation between the velocity of dislocations and the gliding…
Abstract The dislocation structure produced by tensile deformation of magnesium single crystals at 77 K and at room temperature has been investigated by transmission electron microscopy techniques. Sections both parallel and perpendicular to the basal plane have been cut by spark machining from single crystals deforme…
Abstract
A new type yielding phenomenon was observed in Al-Mg and Al-Cu alloys which were pulled at high temperatures above about 350°C. In order to determine characteristics of this high temperature yielding phenomenon, several binary aluminium alloys were investigated by tensile tests at various temperatures from room temper…
The thermodynamic stability of tetragonal germanium dioxide has been characterized by measurements of the equilibrium ratios in the temperature range 830°–1020°K. Results are extrapolated to 298°K using estimated heat capacities, to give the standard thermal parameters, and to the tetragonal‐hexagonal transition point…
Les calculs de l’effet Kerr magnéto-optique des substances isotropes sont effectués jusqu’aux termes proportionnels au carré du paramètre Q de Voigt. Dans le cas du fer, la correction à apporter à l’approximation linéaire est de l’ordre de quelques secondes d’arc. Quelques graphiques illustrent les principaux résultat…
Optical absorption and emission spectra of trivalent ytterbium in various chelates are reported. The experimental energy levels of Yb3+ are compared with predictions of electrostatic crystal-field theory and of a contact model of ligand-field theory. Good agreement is found between theory and experiment for the electr…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Abstract For structures with hexagonal symmetry, three different axial systems (rhombohedral, orthorhombic, and hexagonal) are in general use to define the indices of directions and planes. The hexagonal axial system is the one in which confusion is most likely to occur if the axes and the notation are not clearly def…
Results of BET adsorption measurements on a‐c and d‐c sulfuric acid anodic films on aluminum have been compared with results of pore counts and with coating ratio figures. Both real surface and volume were measured. A roughness factor should be introduced in order to obtain an agreement between data from different sou…
A technique has been developed to measure the 60c/s a.c. intrinsic electric strength of organic polymers. This technique consists in embedding the electrodes and film to be measured in a thermoset resin. The solid construction eliminates prebreakdown discharges on the film surface from the breakdown of liquid used in…
N. S. Anderson and D. A. Rees, J. Chem. Soc., 1965, 5880 DOI: 10.1039/JR9650005880