Materials Literature
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Abstract The mechanism of deformation of metals at high velocities has been studied by examining the microstructure of cylinders of mild steel, duralumin and standard silver (of composition Ag 92.5%, Cu 7.5%) of similar hardness, and of steel balls after impact on steel plates at velocities from 300 to 3830 ft. /sec.…
Abstract A description is given of the experimental technique devised to apply the method outlined theoretically in part I to the measurement of the dynamic compressive yield strength of various steels, duralumin, copper, lead, iron and silver. A polished piece of armour steel was employed as a target, and cylindrical…
Abstract It has long been known that metals may be subjected momentarily to stresses for exceeding their static yield stress without suffering plastic strain. One of the simplest methods for subjecting a metal to a high stress for a short time is to form it into a cylindrical specimen and fire this at a steel target.…
Experiments with aluminum and copper of the highest purity obtainable show that the magnetic susceptibilities of these metals are appreciably altered by cold working. The paramagnetic susceptibility of aluminum is decreased by an amount reaching approximately 15 percent of the original value, and the diamagnetic susce…
Attempts have been made to prepare new model-substances for magneto-chemical investigations. Sodium selenochromite, NaCrSe2, rubidium selenochromite, RbCrSe2, and rubidium thiochromite, RbCrS2, of high purity have been prepared by reaction of the pure elements, and a potassium selenochromite, K0.5CrSe2 or KCrSe2.CrSe2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of Systems of Calcium Stearate and Cetane as Deduced from X-Ray Diffraction PatternsR. D. Vold and Marjorie J. VoldCite this: J. Phys. Chem. 1948, 52, 9, 1424–1444Publication Date (Print):September 1, 1948Publication History Published online1 May 2002Published ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrasonic Velocity in Some Organic Halides: Constitutive EffectsR. T. Lagemann, J. S. Evans, and D. R. McMillan Jr.Cite this: J. Am. Chem. Soc. 1948, 70, 9, 2996–2999Publication Date (Print):September 1, 1948Publication History Published online1 May 2002Published inissue 1…
A bstract The thermal behavior of kaolinite was studied by electron microscopy and X‐ray diffraction. This study has shown that hexagonal‐shaped particles persist far above the dehydration temperature of kaolinite. It was concluded that two stages of reaction represent the steps in the firing of kaolinite. First, the…
Abstract Most foam inhibitors arc insoluble. A criterion is described for selecting foam inhibitors {from insoluble liquids3which form emulsions with the liquid to be defoamed. By determining the surface tensions of the liquid to be defoamed and of the additive saturated with that liquid and the interfacial tension be…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation A. E. Cameron, D. F. Eggers; An Ion ``Velocitron''. Rev. Sci. Instrum. 1 September 1948; 19 (9):…
In a previous communication (Rooksby, 1943) it was reported that critical examination of X-ray powder photographs of nickel oxide disclosed a departure of the crystal structure from cubic symmetry.
Progress of Theoretical Physics Vol. 4 No. 1 (1949) pp. 60-70 Radiation Reaction in Collision Process. III-1 Zirô Koba and Gyô Takeda Progress of Theoretical Physics Vol. 4 No. 1 (1949) pp. 82-94 The Level Shift and the Anomalous Magnetic Moment of the Electron Yôichiro Nambu Progress of Theoretical Physics Vol. 4 No.…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTThe Thermodynamic Properties of Sodium SilicateN. W. McCreadyCite this: J. Phys. Chem. 1948, 52, 8, 1277–1283Publication Date (Print):August 1, 1948Publication History Published online1 May 2002Published inissue 1 August 1948https://doi.org/10.1021/j150464a001RIGHTS & PERMISSION…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Properties oF MethylcyclopentadieneK. C. Edson, J. S. Powell, and E. L. FisherCite this: Ind. Eng. Chem. 1948, 40, 8, 1526–1528Publication Date (Print):August 1, 1948Publication History Published online1 May 2002Published inissue 1 August 1948https://pubs.acs…
The Laplacian probability equation can be used to predict the reproducibility of the intensities of x-rays diffracted by crystalline powders. If absorption is neglected, and N is the number of particles irradiated, p the proportion of particles which are oriented so as to diffract, and q=1 − p, the relative mean devia…
We have developed a method for the evaporation of alloys in high vacuum which from the nature of the procedure used should be applicable to all alloys which are not refractory. The method has been tested on α-brass and β-brass and on a gold-cadmium alloy. These alloys have components whose vapor pressures are very dif…
Abstract The influence has been studied of systematic alterations in the amount of cross linking in elastomers upon diffusion coefficients and permeability constants in elastomers of homologous paraffin hydrocarbons. In a number of such media the influence of chain length of the paraffins upon the transport phenomena…
The heat of sublimation of graphite and the heats of dissociation of CO and C2, which have been the subject of much controversy in recent years, have been unambiguously established by the direct determination of the total vapor pressure of graphite by an equilibrium effusion method and by the determination of the part…
Recently a number of authors have discussed the theory of critical phenomena in magnetic ma-terials and produced results differing from the con-ventional and simple theory as described in many
Abstract The calculations presented are an extension of the work of Bashforth & Adams (1883) to give the shapes of pendant drops of liquids for values of β from — 0.25 to — 0.6 at intervals of 0.025. The results have been used to calculate, to an accuracy of 0.001 to 0.01 %, the constants needed for measuring surf…