Materials Literature
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It is shown that, for crystals of the cubic system, the reciprocal of the integral breadth of a Debye-Scherrer line is cos θ/λ times the volume average of the thickness of the crystal measured at right angles to the reflecting plane. The result is applied to calculate the integral breadths of reflexions from crystals…
Abstract The close-packed structures are made by piling up close-packed planes of atoms in three different relative positions. In proper hexagonal closepacking only two of the positions are used. The intensity of reflexion of X-rays is calculated for a structure which usually follows the hexagonal scheme, but has occa…
Abstract A new method for determining the surface tension of liquids has been derived. This involves the consideration of the advancing and receding contact angles of a liquid drop on a tilted solid surface. The theory has been tested by an improved optical projection technique for a variety of liquid/ solid systems a…
Abstract The need for a simple method of determining brittle points which would be adaptable to a large number of materials led the writers to develop the apparatus described below. There is presented here, for the first time, brittle point data on certain natural and synthetic rubber compositions. The study of the va…
During the last few years large collections of rock specimens from the Toro-Ankole volcanic fields, east and south-east of Ruwenzori, have been sent to Durham by the Geological Survey of Uganda for petrological investigation. The specimens recently studied include representatives of a suite of highly potassic ultrabas…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrosion of Steel by Dissolved Carbon Dioxide and OxygenG. T. Skaperdas and H. H. UhligCite this: Ind. Eng. Chem. 1942, 34, 6, 748–754Publication Date (Print):June 1, 1942Publication History Published online1 May 2002Published inissue 1 June 1942https://pubs.acs.org/doi/10.…
The Raman spectra of pyrrole, pyrrole-N-d, symmetrical pyrrole-d4, and pyrrole-d5 have been studied with a high speed grating spectrograph. The infra-red absorption spectra of the same compounds have been investigated in the liquid state in the region 750–1900 cm−1. With the help of the selection principles and Teller…
Keywords RATES, LOADING, MECHANICAL, PROPERTIES, MATERIALS, EXPERIMENTAL, APPARATUS, CRUSHING, STRENGTH, CONCRETE, TESTING, MACHINES, TENSILE... Show All
An earlier empirical classification of rheological properties is discussed in the light of a power-law relation between stress, strain and time. Partial differentiations of stress, strain and time products with respect to stress and strain (but not to time) give expressions which tally comparatively well with the earl…
In accordance with the general methods of an earlier paper (reference 1) an integral equation is evolved for the radial distribution function for pairs in a liquid, and an approximate solution is effected for a system of ``hard spheres.'' The form of the function depends on a single parameter λ which can be related to…
X-ray studies have been made of a number of carbon blacks, prepared under different conditions, and subject to various heat treatments. The patterns were made in evacuated cameras, using Cu Kα radiation monochromated by reflection from rocksalt. The patterns consist of crystalline reflections (00l), and two-dimensiona…
Abstract Inasmuch as steam temperatures in modern central stations are approaching those used for the commercial production of hydrogen by reaction between steam and iron, an investigation was undertaken at Purdue University of the corrosion by steam of the various steels which are available for high-temperature servi…
A chart is constructed for converting the apparent magnetic permeability to the true permeability of cylinders of any given ratio of length to diameter. The curves are based on previous calculations in which account was taken of the variation of the demagnetizing factor N with permeability, but in which the permeabili…
From the known structure of the diamond the total surface energy of the crystal has been calculated in terms of the energy of the carbon-carbon bond, and is found to be: 1.50×10−9EB erg cm−2 for the 111 face, and 2.10×10−9EB erg cm−2 for the 100 face, where EB is the energy in ergs per bond. If the bond energy is assu…
Abstract Nach dem aluminothermischen Verfahren wurden die Boride Mo 7 Al 6 B 7 and WB 2 hergestellt. Die Abmessungen der Elementarkörper und die Dichten dieser Substanzen werden angegeben.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of FluorineGeorge H. Cady, Douglas A. Rogers, and Clarence A. CarlsonCite this: Ind. Eng. Chem. 1942, 34, 4, 443–448Publication Date (Print):April 1, 1942Publication History Published online1 May 2002Published inissue 1 April 1942https://pubs.acs.org/doi/10.1021/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Transition and Elastic Behavior of High PolymersH. MarkCite this: Ind. Eng. Chem. 1942, 34, 4, 449–454Publication Date (Print):April 1, 1942Publication History Published online1 May 2002Published inissue 1 April 1942https://pubs.acs.org/doi/10.1021/ie50388a016https://d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic Activity of an Intermetallic Compound of Cadmium and Copper in the Vapor-phase Reduction of Nitrobenzene.Reuben Joseph GrimCite this: J. Phys. Chem. 1942, 46, 4, 464–469Publication Date (Print):April 1, 1942Publication History Published online1 May 2002Published in…
Electron diffraction was used to measure the rate of the reaction between copper and pure dry oxygen at room temperature and 20 mm. pressure. The experimental technic is described in detail. The empirical rate of reaction is found to be inversely proportional to ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathM…
Clay materials are composed essentially of minute crystalline particles of any one or more members of a few groups of minerals known as the "clay minerals." Using this clay-mineral concept as a point of departure, researches starting from the many fields in which clay materials are important-from agriculture, engineer…