Materials Literature
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Les composés monocliniques pseudo-hexagonaux (groupe I/2m) Cr3X4 = □ Cr2+I (Cr3+II)2 X24- (X = S, Se, Te) dérivent du type NiAs. Les lacunes □ ordonnées du réseau des cations se trouvent dans des plans (101). Dans l'hypothèse d'interactions isotropes, on déduit théoriquement les configurations magnétiques possibles. L…
Grain boundaries in crystalline solids exert a pronounced influence on almost all the properties of polycrystalline bodies, as well as affecting the kinetics of most solid-state processes that occur therein. They have therefore been the subject of numerous theoretical and experimental researches in both metallic and n…
L. M. Brown and A. R. Thölén, Discuss. Faraday Soc., 1964, 38, 35 DOI: 10.1039/DF9643800035
_allows a possible interpretation of the mechanism of the. reactions and prediction or the experimental rate constants of similar reactions. The decompositions involving Mgco 3 and Caco 3 a:re m.ost suitable for detailed analysis on the basis of the availabill ty of dependable rate data. and infrared crya tal spectra…
The influence of metal yielding on the anodic dissolution rate of 18Cr‐8Ni stainless steel in 42 weight per cent (w/o) aqueous magnesium chloride solution at 154°C has been examined under conditions of controlled potential. At −0.14v ( e H ) in solution flowing at 52 cm/sec to eliminate concentration polarization, yie…
N. F. Curtis, J. Chem. Soc., 1964, 2644 DOI: 10.1039/JR9640002644
The law-energy electron diffraction work of L. H. Germer, J. J. Lander, A. U. MacRae, J. Morrison and others is resulting in new information about surface structures. These three-dimensional structures have periodicity only in two dimensions. The 230 triperiodic space groups are not applicable to the solution of these…
The tensile strength and ultimate elongation properties of any given amorphous elastomer can be described by a characteristic failure curve. It is shown in this paper that the failure curve can be predicted from a knowledge of the creep curve of the elastomer together with the data from a Mooney-Rivlin plot. The theor…
The two-beam dynamical theory of Howie and Whelan is used to calculate the electron microscope image contrast from dislocations normal to a thin crystal and parallel to the direction of the incident electron beam. Bending of the lattice planes due to surface relaxation and change in lattice parameter are taken into ac…
Corrosion rates of iron in chromate and nitrite solutions were measured by a sensitive electric resistance method supplemented by weight loss. The critical concentration below which corrosion increases or pitting occurs is for and for . Presence of Cl − and increases these values. Sulfates break down passivity in nitr…
Abstract A more precise interpretation of the defect structure of wurtzite crystals as observed in the electron microscope is presented. It was found previously that the crystals contain faults in the basal planes (b‐faults) and in prism planes (p‐faults). Direct evidence is presented indicating that the transition wu…
The absorption, excitation, and fluorescence spectra of are presented and interpreted. The high luminescent efficiency of this material and its unusual performance at elevated temperatures are discussed. The comparative behavior of other rare earths in yttrium oxide and of the rare earths in certain other oxides of yt…
A study by interference microscopy and ellipsometry shows that the spontaneous spreading of nonpolar liquids on smooth, clean metal surfaces is characterized by the advance from the bulk liquid of a primary film less than 1000 A. thick, usually followed by a thicker secondary film. The movement of the secondary film r…
Magnetization processes and structure changes in helical and modified helical spin arrangements due to application of a magnetic field are studied for finite temperatures and absolute zero in a number of cases of different anisotropy energy. In the case of a strong anisotropy giving rise to a propser helical structure…
The internal morphology of isothermally bulk-crystallized fractions, and of whole polymer, Marlex 50 polyethylene is revealed by fracture experiments. Three distinctly different types of lamellae are then observable if one uses suitable electron microscopic techniques: (1) regular or type I lamellae which are similar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of Ethylenediaminetetraacetato Complexes. II. The Structure of Crystalline Rb[Fe(OH2)Y].H2O. III. The Structure of Crystalline Li[Fe(OH2)Y.2H2OM. D. Lind, M. J. Hamor, T. A. Hamor, and J. L. HoardCite this: Inorg. Chem. 1964, 3, 1, 34–43Publication Date (Prin…
Equations for the apparent heat capacity in the glass-transition interval as functions of temperature, heating rate, and thermal history have been developed and programmed for computation. The hole theory of liquids was used as basis for the analysis of the glass transition. Experimental information was derived from d…
Radio noise due to corona discharges on suspension insulators is studied as influenced by atmospheric humidity, insulator-surface pollution and harmonic contents in the alternating-voltage wave applied across the insulator. The radio-noise level is also measured under direct-voltage conditions. The tests are carried o…
The fundamental parts of the nautiloid shell are (1) conch, (2) septa, (3) connecting ring, (4) siphonal deposits, and (5) cameral deposits. It is important to recognize that the septal neck and connecting ring, ordinarily considered the two hard parts of the siphuncle universally developed, are discrete structures. C…
A sample of soil taken from the field will contain mineral particles of very different sizes. There may be sizeable stones in it which have to be removed in order to obtain a homogeneous sample on which to conduct soil investigations. This is unfortunate because the field behaviour of a soil may be markedly affected b…