Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Palladium and Platinum Synthetic High Polymer Catalysts and the Relationship between Particle Size and Rate of HydrogenationLouis D. Rampino and F. F. NordCite this: J. Am. Chem. Soc. 1941, 63, 10, 2745–2749Publication Date (Print):October 1, 1941Publication H…
Abstract This paper reviews recent experimental work on phase transitions in rubber—particularly the change from the amorphous to the crystalline form. Several possible explanations are considered to account for the vagueness of the melting point of rubber. Molecular inhomogeneity does not completely explain the pheno…
By considering all the possible systematic errors in the determination of lattice spacings by the back-reflection camera, methods have been devised for their correction. For cubic crystals, if the observed values of lattice spacing are plotted against cos Φ, where Φ is the supplement of the angle of deviation, a strai…
A detailed study has been made of the lattice imperfections which are assumed to account for plastic deformation. Calculations of the strain energy associated with these dislocations have been made in the following cases: a dislocation in a uniform shear stress, two dislocations in an infinite medium, and a dislocatio…
Abstract A historical introduction outlines the development of experimental and theoretical interest in the diffuse diffraction of X-rays by single crystals. The present experimental study, illustrated by numerous photographs, has consisted in taking Laue, oscillation and rotation photographs, in many different orient…
Abstract Films of tungsten have been prepared, by evaporation from a filament, which bring the reactions pH2=oH2 and H2+D2=2HD to equilibrium in a few minutes at 77° K. Their real surface area could be estimated as about 450 cm.2, from a measurement of the quantity of hydrogen which was rapidly and irreversibly adsorb…
A study was made of the effect of grain size and heat treatment upon the impact-toughness of SAE 1050 steel, as judged by the temperature range wherein cold-brittleness occurred. There was no relation between grain size and impacttoughness in the hot-rolled steels. Normalizing improved this property, and in this condi…
Differential heating curves were used to study the behavior of calcium sulfate at high temperatures. After cooling, the material was examined by means of the petrographic microscope and by study of its X-ray pattern. It was found that the beta-to-alpha transition of calcium sulfate occurs at approximately 1,214 C, and…
A bstract The present picture of the atomic arrangement in glass has developed from four kinds of information, namely, the laws of crystal chemistry, the X‐ray diffraction study of glass, the various measured physical properties of glass, and the kinds of materials and the ranges of composition in which glassforming p…
The alloys of copper and iron which have been studied show unusual magnetic properties both in the saturation effects at low temperatures and in the apparent change in the magnetic moment of the dissolved iron atoms over the range of temperatures from 14\ifmmode^\circ\else\textdegree\fi{}K to 1300\ifmmode^\circ\else\t…
Wool is remarkable among textile materials in that it possesses high extensibility and the ability to return to its original length or shape after being stretched or distorted. These properties are of advantage in such products as clothing, blankets, and carpets. It is shown that a number of the important physical pro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrosion of 18–8 Stainless Steel in Sodium Chloride SolutionsH. H. Uhlig and M. C. MorrillCite this: Ind. Eng. Chem. 1941, 33, 7, 875–880Publication Date (Print):July 1, 1941Publication History Published online1 May 2002Published inissue 1 July 1941https://pubs.acs.org/doi/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE HIGH-TEMPERATURE CHLORINATION OF SATURATED ALIPHATIC MONOCHLORIDES. A "VICINAL" EFFECT1FREDERICK F. RUST and WILLIAM E. VAUGHANCite this: J. Org. Chem. 1941, 06, 4, 479–488Publication Date (Print):July 1, 1941Publication History Published online1 May 2002Published inissu…
Reusch and Sohncke have examined the properties of a system containing a large number n of identical retardation plates, each of which is rotated with respect to the one preceding it through the angle ω. The product of n and ω must be equal to μπ, where μ is an integer. Under certain conditions this system is opticall…
Abstract Beim Zusammenkochen von Lösungen von Magnesiumchlorid und Kieselsäurehydrat mit Kaliumhydroxyd und Calciumhydroxyd wurden Magnesiumsilikatgele erhalten, die im Unterschied zu analog gefällten Aluminiumsilikaten deutliche Interferenzen gaben, und zwar alle für die Silikatschichten der Tonmineralien charakteris…
Abstract Titan kann Sauerstoff in fester Phase lösen; dabei ändern sich die Gitterkonstanten und damit das Molvolumen nur wenig. Während die c‐Achse bis zur Phasengrenze bei der Zusammensetzung TiO 0,42 regelmäßig um 1,8% anwächst, kommt die Änderung der a‐Achse.
The photoelectric current emitted under the influence of an applied electric field is found to contain a term analogous to the Schottky term for thermionic emission and also a term periodic in the field intensity similar to that recently found and explained for thermionic emission. If frequencies near the threshold ar…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTAnalysis of Cellulose Derivatives:Determination of Total Combined Acyl in Cellulose Organic EstersLeo Genung and Russell MallattCite this: Ind. Eng. Chem. Anal. Ed. 1941, 13, 6, 369–374Publication Date (Print):June 1, 1941Publication History Published online1 May 2002Published i…
Abstract The authors discuss the results of an investigation on the resistance to plastic forming of several metals over a wide range of rates of deformation at various temperatures. To carry out the tests, two machines were built: One, a high-speed testing machine, was described in Part I of this report; the other, a…
With a given specification of the space-charge density and velocity functions for a general electron-tube system, the balance of instantaneous rates of energy change between the space and the external circuits has been derived here from Green's theorem. It is shown that the external currents can be completely accounte…