Materials Literature
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In recent years, several reports have been made on the experiments of the cavitation damage. But, for some of them, it is assumed that their cavitation impingements were severer than the real one. In this studies, more natural method (cf. Fig. 1, Photo. 1) was used for the erosion tests of the copper alloys (Sn bronze…
Successive observations of emission patterns of point cathode at high temperature after its various pre-treatments were made by using Müller's type microscope. Soon after the observation of the emission pattern, the shape of the tip was also examined under an optical microscope. As the results, it was found that the s…
Abstract not Available.
A process for the preparation of high‐purity thorium powder by calcium reduction of thorium oxide has been developed, Calcined thorium oxide is reduced in an inert atmosphere at 950°C with high‐purity calcium metal in the presence of calcium chloride. The reduction vessel is fabricated of type 446 stainless steel to a…
The phenomenon of hysteresis occurring in a series nonlinear resonant circuit has interested engineers for a long time. The phenomenon is associated in literature with a resonance occurring at a critical value of applied voltage where the nonlinear inductance, variable with the magnitude of the forcing function, reach…
G. Baddeley, B. G. Heaton and J. W. Rasburn, J. Chem. Soc., 1960, 4713 DOI: 10.1039/JR9600004713
Article Die Druckabhängigkeit der Ionenleitfähigkeit anomaler Mischkristalle von AgBr und AgJ was published on January 1, 1960 in the journal Zeitschrift für Physikalische Chemie (volume 23, issue 5_6).
The oxidation of antimony has been studied between 265° and 385°C. The reaction is characterized by an initially parabolic growth rate, which degenerates into a time‐independent rate, controlled by the gaseous diffusion of ( Sb 2 O 3 ) 2 from the surface region to the cold wall outside the sample furnace. The stationa…
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Effects of molybdenum, wolfram and copper on solubility of graphite in liquid iron were studied at 1550°C. Interaction parameters at graphite saturation were given as follows:A general approximate equation for calculating the activity coefficient of carbon in a multicomponent solution was given as follows:Validity of…
Abstract Zur Untersuchung gelangten die stark polaren Anteile (Chf‐Alk‐(2:1)‐Extrakt) der aus den Samen von Strophanthus sarmentosus var. senegambiae nach Fermentierung gewonnenen Glykoside. Es konnten darin insgesamt 32 Glykoside (I–XXIII, F–N und S) nachgewiesen werden. Sechs davon (I–VI) waren relativ schwach polar…
Investigations show that a satisfactory classification of insulating materials with respect to their resistance to deterioration and breakdown by surface discharges in air is given by time-to-breakdown tests using simple rod and plate electrodes. It is necessary to circulate dry air over specimens to avoid the formati…
The primary mode of degradation of polybenzyl at elevated temperatures in the presence of air has been found to be an oxidative attack on the methylene bridge. Initially the methylene bridge is oxidized to keto and hydroxyl groups. Later substantial amounts of acid anhydride and/or ester are formed. Extensive oxidatio…
Clay minerals were collected from shales and clay deposits in New England and Eastern Canada ranging in age from Precambrian to Recent. The collection was made to include representative clay minerals of each district, geological period, and environment. Fifty-six samples were selected for detailed petrographic and X-r…
48Ti, 51Vの(α, n)反応の断面積をEα=31 MeVまでStacked foil法を使った放射化法で測った。これらの反応は51Crおよび54Mnの無担体放射性同位元素の製造に対しても考慮さるべき経路の1つであろう。照射には核研160cmサイクロトロンを使用し,ビームの強さはファラデー・カップを用いて測った。Ti-ターゲットとしては約1.8mg/cm2の金属箔を, V-ターゲットとしてはAl箔の上にV2O5を少量のクリヤー・ラッカーと共に吹きつけたものを用いた。照射後短寿命放射能を崩壊させてのち, 51Crの325keV-γ線, 54Mnの840keV-γ線を1 3/4;×2in.の井戸型シンチレータで測定した。放射能の…
The properties of the field emission electron source are discussed. These include high current density, small size, no heater, instantaneous response, and a highly non-linear current-voltage relationship. Engineering data are then derived including conductance, perveance, beam power, etc. It is shown that the field em…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVAPOR PRESSURES OF FeCl2, FeBr2 AND FeI2 BY THE TORSION EFFUSION METHODR. J. Sime and N. W. GregoryCite this: J. Phys. Chem. 1960, 64, 1, 86–89Publication Date (Print):January 1, 1960Publication History Published online1 May 2002Published inissue 1 January 1960https://doi.or…
Electron microscopy of fractured and polished surfaces of commercial silicate glasses by the preshadowed carbon replica technique reveals the presence of inhomogeneities in the glass ranging in size from 30 to 150 a.u. in diameter. Experiments were carried out to prove that the observed features resulted neither from…
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This is the first of a series of papers concerned with the general problem of thermal degradation and oxidation of polymers. Part I consists of a description of the technique used and the results obtained on butylated melamineformaldehyde and urea-formaldehyde resins. The course of the degradation and/or oxidation is…