Influence of dislocation dipoles on physical properties
J. J. Gilman, Discuss. Faraday Soc., 1964, 38, 123 DOI: 10.1039/DF9643800123
Materials Literature
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A novel method of semiconductor device measurements
Electrical signals induced in semiconductor devices by a high-resolution scanning electron beam have been used to determine the boundaries of doped (p or n) regions, even when these boundaries lie beneath passivating oxide layers, or beneath evaporated metal leads. The uniformity of planar junctions lying beneath the…
Preparation and Properties of the Boron Phosphides
The reactions between boron and phosphorus to form the boron phosphides are described. The elements were compacted into pellets and dropped into a preheated reaction zone. The reaction between zinc phosphide and boron also resulted in the formation of the boron phosphides and the complete removal of zinc in the vapor…
2—FILAMENT MIGRATION IN SINGLE YARNS
The examination of yarns containing one coloured filament enables the behaviour of individual filaments within twisted continuous-filament yarns to be studied. By this means it is possible to correlate the radial position at any one point in a yarn with that at all subsequent points. This has been done for a series of…
Crystallization and Melting Behavior of Polyethylene Oxide Copolymers
The course of isothermal crystallization of a series of high molecular weight polyethylene oxide copolymers was studied with a microdensity balance. The comonomers, butylene and styrene oxides, ranged from 0.2 to 4 mole%; several examples of different polymerization conditions were also studied. The consequence of add…
The Anodic Dissolution of Gold in Cyanide Solutions
The anodic dissolution of gold in alkaline cyanide solutions has been studied by potentiostatic and galvanostatic techniques under high‐purity conditions. Measurements were made at room temperature and in the p H range 11–13, the concentration varying from 0.05 to 0.50%. The results show that gold has three current ma…
The Development of the Zircaloys
The experimental work leading to the development of Zircaloys -1, -2, -3, and -4 is reviewed. The corrosion properties of Zircaloys -2 and -4 in high temperature water and steam, and the effects of composition, heat treatment, and water chemistry upon oxide film formation and hydrogen absorption during corrosion are a…
Recombination of oxygen atoms on oxide surfaces. Part 1.—Activation energies of recombination
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Self-Activated Luminescence of M2+ Niobates and Tantalates
Among 22 compounds examined for photoluminescence, only , and the metaniobates of Mg Ca, Zn, and Cd show appreciable room temperature emission. With the exception of , all of these have the columbite structure; moreover, the only essentially nonluminescent columbite‐type compound noted was . The absorption edges of th…
Effect of Cold-Work on Corrosion of Iron and Steel in Hydrochloric Acid
Zone‐refined iron corrodes at the same rate whether cold‐worked or annealed. Cold‐working of iron containing 0.007–0.15% carbon increases the corrosion rate in 0.12 N HCl ( p H = 1.01 ) , the rate increasing still more after heat treating the iron at 77°–100°C for 2 hr. Cold‐working of iron containing 0.01–0.02% nitro…
INFRARED SPECTRA AND CRYSTALLINE PHASE TRANSITIONS OF AMMONIUM NITRATE
The infrared spectra of solid crystalline films of ammonium nitrate were measured at temperatures ranging between the melting point (169 °C) and liquid air temperature (−190 °C). Four different spectra were obtained which are shown to belong to phase I, II, IV, and (very probably) VII. Phases III and V were not encoun…
Elastic moduli of polymer crystals for the chain axial direction
Abstract Some experiments were carried out to prove the validity of the assumption of a simple series model for the calculation of the elastic modulus of crystalline regions in oriented linear polymers from X‐ray determination of lattice extension. Various specimens such as filaments, fibers, and films were prepared f…
339. Metal–metal bonds. Part I. Compounds of gold(0) with the carbonyls of manganese, iron, and cobalt
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Types of Opaline Silica Depositions in the Leaves of British Grasses
Eighty of the 150 or so grass species occurring in Britain have been subjected to controlled wet oxidation to facilitate the study of the opaline silica bodies in their silica cells proper, and in cells which are less consistently silicified. The various types of bodies are classified, figured, and described so as to…
Magnetic properties of normal spinels with only a-a interactions
The theory of ferrimagnetism accounts for the magnetic properties of the ferrites by strong antiferromagnetic A-B interactions and weak antiferromagnetic A-A and B-B interactions. It was recently discovered that the A-A interaction in Co3O 4 was much stronger than anticipated. To ascertain whether the anomalous strong…
THEORY OF INTERNAL BUCKLING OF A CONFINED MULTILAYERED STRUCTURE
International audience
Effects of water vapour on sintering of MgO
P. J. Anderson and P. L. Morgan, Trans. Faraday Soc., 1964, 60, 930 DOI: 10.1039/TF9646000930
Flashover mechanism of polluted insulation
When a leakage current flows over the wet polluted surface of an insulator, high-resistance dry bands form. Discharges across these dry bands usually become extinguished but, exceptionally, may develop into a flashover of the insulator. The formation of dry bands and the subsequent growth of discharges on the polluted…
Théorie dynamique de la diffraction des rayons X par les cristaux déformés
La théorie dynamique classique de la diffraction des rayons X est étendue au cas des cristaux ayant subi une déformation quelconque et des ondes non planes. La méthode consiste à résoudre les équations de Maxwell en considérant les déformations et la courbure des ondes comme des perturbations du premier ordre. On obti…
Flashover mechanism of polluted insulation
When a leakage current flows over the wet polluted surface of an insulator, high-resistance dry bands form. Discharges across these dry bands usually become extinguished but, exceptionally, may develop into a flashover of the insulator. The formation of dry bands and the subsequent growth of discharges on the polluted…