Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structures of three solid solution phases of ammonium nitrate and potassium nitrateJames R. Holden and Charles W. DickinsonCite this: J. Phys. Chem. 1975, 79, 3, 249–256Publication Date (Print):January 1, 1975Publication History Published online1 May 2002Published in…
Analytical theories are developed for the steric stabilization of colloidal spheres and flat plates by monodisperse tails. It is proposed that the reason for the failure of previous theories to predict the correct distance dependence of the repulsion resides in their neglect of lateral interactions between adjacent st…
Ferrimagnetic materials for microwave applications are reviewed with emphasis on the more recent advances. Specific areas of discussion include temperature sensitivity of the magnetization, microwave loss phenomena and the concept of effective linewidth, and the hysteresis loop in terms of the factors which influence…
The relative fluorescence output and Eu3+ 5D0 level lifetime, τ, of crystalline Eu(hfaa)4ButNH3(hfaa = hexafluoroacetylacetonate anion) have been measured over the temperature range 90–300 K. The observed decrease in τ with increasing temperature is attributed to a back donation of energy from the 5D0 level to the lig…
An analogy between damage inflicted by a single-point hard-particle impact and damage inflicted by inserting a flaw of known dimensions in a static tensile coupon is discussed. The results suggest that residual strength can be predicted as a function of kinetic energy of impact by executing two experiments, a static t…
Abstract The thermal expansion of GeSe has been studied above room temperature up to the melting point of 670 ± 5°C by X‐ray diffraction techniques using a 190 mm Unicam high temperature camera. The thermal expansion of the crystallographic axes is linear with a distinct change of the expansion coeffients for all axes…
The oxygen positions and structure determined for PbsGe3O11 by Iwata, Koizumi, Koyano, Shibuya and Niizeki (J. Phys. Soc. Japan 35, 314 (1973)) have been confirmed by an independent refinement of 300 neutron reflections collected at the Puerto Rico Nuclear Center using isotropic temperature parameters and a full matri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and spectral characterization of the reduction steps of .mu.-oxo-bis(iron tetraphenylporphyrin) dimer in dimethylformamideKarl M. Kadish, Gary Larson, Doris Lexa, and Michel MomenteauCite this: J. Am. Chem. Soc. 1975, 97, 2, 282–288Publication Date (Print):Ja…
The amplitude-dependent internal friction and Young’s modulus have been measured as a function of the crystal orientation in magnesium single crystal specimens of 99.9% purity by using a flexural vibration method at room temperature. It has been found that, if only the basal slip system is operative, Schmid’s law hold…
Describes commercially available natural fibers, manmade fibers, and their physical properties. Reviews laboratory tests for the classification of newly synthesized manmade fibers. The seventh edition adheres to the schematic approach used in earlier editions but places more emphasis on the use of microscopy in fiber…
I Introduction.- I. Evolution of the Scanning Electron Microscope.- II. Evolution of the Electron Probe Microanalyzer.- III. Combination SEM-EPMA.- IV. Outline and Purpose of This Book.- References.- Bibliography of Texts and Monographs in SEM and EPMA.- II Electron Optics.- I. Electron Guns.- A. Tungsten Filament Cat…
XPS studies of the bulk oxides of lead reveal no clear evidence for the presence of the expected two oxidation states of lead in Pb3O4. They also show that the Pb 4ƒ binding energies of the two crystallographic modifications of lead monoxides are the same, within experimental error, but are greater than those for β-Pb…
Abstract Die 1,1‐Dialkyl‐3‐benzoyl‐thioharnstoffe 1 erweisen sich als ausgezeichnete Chelatbildner mit Übergangsmetallionen. Die Chelate mit Nickel(II), Kupfer(II), Kobalt(III) und Palladium (II) werden charakterisiert. Für den Kupfer(II)‐Komplex von 1,1‐Diäthyl‐3‐benzoylthioharnstoff 2d wird ESR‐spektroskopisch eine…
The crystal structures of the isomorphous salts MI6[Mo7O24],4H2O (M = NH4 or K) have been refined by three-dimensional X-ray diffraction methods. Unit cell dimensions of these monoclinic compounds, space group P21/C with Z= 4, are, ammonium salt: a= 8·3934 ± 0·0008, b= 36·1703 ± 0·0045, c= 10·4715 ± 0·0011 Å, β= 115·9…
The spinels are one of the most extensive series of related chemical compounds known. The mineral spinel Mg 2+ Al 2 3+ O 4 2- can be modified by substitution by a wide range of divalent and trivalent cations to replace Mg 2+ and Al 2 3+ respectively. The spinel crystal structure is physically flexible which leads to a…
This study is part of a programme to determine the diffusion behaviour of the principal constituents of Type 316 stainless steel. Chromium diffusion plays an important role in the oxidation behaviour of stainless steels and both lattice and grain-boundary diffusion rates have been measured. Lattice diffusion in the te…
There are two important mechanisms which produce image contrast in the electron microscope.
SUMMARY Temperature gradients in high speed steel tools used to turn iron, titanium and nickel have been measured using a method based on the structural changes in high speed steel heated to temperatures over 560°C. The relationship between temperature gradient, cutting speed and feed rate have been demonstrated throu…
The theory described in the preceding paper is extended to include intramolecular reactions in A—A + B—B type polymerisations. The extension is described in a general way and a limiting form is applied to previously published data giving total ring fractions during the formation of linear polyurethanes. The interpreta…
The subsolidus miscibility gap for the TiO 2 ‐SnO 2 system was redetermined. The critical temperature, 1430°C, is intermediate between that determined by Padurow, 1330°C, and that determined by Garcia and Speidel, 1475°C. Although the phase boundary is slightly asymmetric (the critical composition occurs at 47 mol% Ti…