Materials Literature
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Stacking faults on the (111) planes of several face-centred cubic metals and alloys have been introduced by cold work, and estimates of the stacking fault probability α, have been obtained from changes produced in the Debye-Scherrer spectrum. The faulting probability increases on alloying, from one plane in 300 in cop…
A neutron diffraction study has been made of the magnetic properties of the series of perovskite-like compounds $\mathrm{La}[(1\ensuremath{-}x)\mathrm{Mn}, x\mathrm{Cr}]{\mathrm{O}}_{3}$. This series exhibits ferromagnetic and antiferromagnetic properties which depend on the composition of the sample. The antiferromag…
Atomic scattering factors can be expressed analytically by an expansion of Gaussian functions. A two-term expansion is sufficiently accurate to cover the Cu Ks range of scattering angles occurring in crystallographic calculations. For the Mo Ks range, one extra constant is to be added.
Several seandates, vanadites, galliates and orthoehromites of several of the rare earth elements and yttrium are isostructural with Gd_FeO 3. The paper includes a summary discussion of the compounds so far studied in this series of papers. Particular emphasis is given the transitions which have b~en observed and the r…
Abstract Zinc crystal wires in which the basal plane was nearly parallel to the wire axis were found to twin at abnormally high stresses. No single critical resolved shear stress exists; resolved shear stresses near 3⋅7 Kg/mm2 were common for short crystals, while longer crystals (which often fractured at the instant…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrothermal Reactions between Calcium Hydroxide and Amorphous Silica: the Reactions between 180 and 220°Gunnar O. AssarssonCite this: J. Phys. Chem. 1957, 61, 4, 473–479Publication Date (Print):April 1, 1957Publication History Published online1 May 2002Published inissue 1 A…
In this paper the various causes which determine yarn hairiness are studied with particular reference to the influence of twist. A theory of the causes of hairiness in cotton, worsted and spun rayon yarns, which is based on the work of Morton and Yen concerning the migration of fibres in yarns, is outlined. The hairin…
The magnetostriction of oriented polycrystalline MnBi was found to be higher than any published value for a metal. A value of −250×10−6 was measured parallel to a field of 22 000 oersteds oriented perpendicular to the c axis of the aligned hexagonal crystallites. This field magnetized the specimen to only slightly mor…
The dependence of saturation induction at room temperature upon composition for the substitution of nonmagnetic ions into BaFe12O19, into BaM2Fe16O27 (where M2=Ni2, Ni1.5Cu0.5, Zn2), and into the mixture BaNiFe14O23 is given. Evidence is presented for the existence of points of magnetic compensation in a number of ser…
It is often necessary to obtain expansions in spherical harmonics that belong to a given irreducible representation of a symmetry group. This is the case, for instance, when the cellular method is applied to investigate the band structure of a metal, where expansions are required that reproduce the symmetry of the gro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Heat Capacities and Thermodynamic Properties of Crystalline and Vitreous Anhydrous Sodium Tetraborate from 6 to 350 °K.Edgar F. Westrum Jr. and George GrenierCite this: J. Am. Chem. Soc. 1957, 79, 8, 1799–1802Publication Date (Print):April 1, 1957Publication History Publ…
The interrelationship of corrosion rate of steel, dissolved oxygen concentration, agitation, electrode potential, and cathodic protection current density were studied under controlled laboratory conditions. While the corrosion rate of steel is essentially linear with amount of dissolved oxygen, the rate appears to fal…
The tearing failure of materials depends very strongly on the conditions of use or testing which produce the non-uniform tensile stress which causes such failure. In the trapezoid tear test. the stress pattern is determined largely by variables at the disposition of the operator. The effect of these variables on the t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAntiviral Compounds. II. Aromatic GlyoxalsRobert Bruce Moffett, Burris D. Tiffany, Brooke D. Aspergren, and Richard V. HeinzelmanCite this: J. Am. Chem. Soc. 1957, 79, 7, 1687–1690Publication Date (Print):April 1, 1957Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility of Phosphates, Rates of Solution of Calcium Phosphates in Phosphoric Acid SolutionsE. O. Huffman, W. E. Cate, M. E. Deming, and K. L. ElmoreCite this: J. Agric. Food Chem. 1957, 5, 4, 266–275Publication Date (Print):April 1, 1957Publication History Published onlin…
Abstract A theory for the tensile strength of rubbers is presented. It gives reasonable agreement with the available experimental data for natural and synthetic rubber. One of the basic postulates of the theory is that, in order for the sample to break, conditions must be such that when one chain breaks the extra load…
Abstract Durch Umsetzen von Cr 2 O 3 mit Silberpulver im Sauerstoffstrom bei 650° C wurde die Verbindung AgCrO 2 , durch Umsetzen entsprechender binärer Chalkogenide in evakuierten Quarzbömbchen bei höheren Temperaturen wurden die Verbindungen CuCrS 2 , AgCrS 2 , CuCrSe 2 und AgCrSe 2 hergestellt und röntgenographisch…
Data are presented for the solubility of hydrogen and deuterium in eight nonpolar solvents from —25°C to 35°C, and show that deuterium is about 2.5% more soluble. The data are accurate to 0.1% and correlate successfully with the solubility parameter of the solvent. The various thermodynamic functions are calculated.
Abstract 1. The hydrogen bonding effect on the fluorescence of quinoline and acridine was studied in non-polar solvent mixed with various proton donors. 2. The equilibrium constants of hydrogen bonding calculated from the absorption and fluorescence data were the same for these molecules, in contradistinction to the c…
Intensities of X-ray diffraction from α-AgI at various temperatures were measured in the absolute scale by using a G–M counter spectrometer with the crystal monochromated Cu Kα radiation. Measurements of the specific heat and the thermal expansion were also performed. A drastic temperature dependence of the intensitie…