Materials Literature
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Cobalt and Co‐Ni alloy were electrodeposited into the micropores of various kinds of anodic oxide films on aluminum. Fine granular metals precipitated on the barrier layer and formed columnar structures. Although the films of cobalt or nickel showed remarkable magnetic anisotropies perpendicular to the surface, the al…
A modified thiocarbohydrazide (TCH) technique to cross-link osmium layers has resulted in a reliable method for preparing a wide variety of soft biological tissues for scanning electron microscopy without the use of evaported metal. The technique works equally well on tissues with smooth surfaces and those with abrupt…
The model of pancreatic trypsin inhibitor determined by Huber, Kukla, Rtihlmann, Epp & Formanek [Naturwissenschaften (1970). 57, 389-392] was fitted to an electron-density map of 1.9 A resolution calculated with isomorphous-replacement phases by application of the real-space refinement procedure of Diamond [Acta Cryst…
The human body exchanges heat with its environment via radiation, convection, conduction and evaporation. Each of the heat exchange terms in the heat balance equation S = M-E-(+/- W)-C-R has been described in further detail as related to environmental conditions and to the effect of clothing. Such factors as air veloc…
An APS sponsored study reviewed the state of research and development in radiation effects on materials for the purpose of identifying basic scientific problems which limit progress in energy applications and which could be attacked by physicists, especially those in universities.The field of radiation effects on mate…
Modifications of the electronic structure of (112̄0) CdS surfaces as determined by Kelvin photovoltage spectroscopy have been related to changes in their atomic compositions as measured by Auger electron spectroscopy. Effects of chemical contamination, nonstoichiometry, and lattice disorder on the surface electronic p…
The crystal structure of rankinite has been determined by Patterson and direct methods and refined to R=11.6%, using a crystal from Fuka, Bitchu-cho, Japan: P21⁄a, a 10.60(2), b 8.92(2), c 7.89(2)Å, β 119.6(1)°, Z=4 Ca3Si2O7. There are in the structure arrays of Si2O7 groups parallel to the c axis, and the groups are…
It is well known that the columnar dendrite grows in a direction opposing the liquid flow. Therefore, in order to make clear the fluid flow within liquid pool, the solidification structures of steel slabs cast continuously by the curved mould bending type machine were investigated. At the same time, the amount of larg…
The nature of hydrogen solutions in metals and the evidence for physical and chemical hydrogen traps are examined as a prerequisite for interpreting and evaluating experimental observations and information from manufacturing operations. The sources, distribution, control, and effects of hydrogen are then considered fo…
A compilation of data on solder glasses from the literature is presented. Sources are: Chemical Abstracts, Ceramic Abstracts, Abstracts in Physics and Chemistry of Glasses, and pertinent books. Even though not exhaustive, domestic and foreign sources are included.
A survey, comparison, and critical analysis is presented of data compiled from the scientific literature concerning diffusion in copper alloy systems involving elements in Groups IA, IIA, IIIB, IVB, VB, VIB, and VIIB. Here the term ’’copper alloy system’’ is interpreted in the broadest sense. For example, the review o…
A new model for the deformation behavior of ATJ-S graphite, a non linear transversely isotropic material, under initial loading is described. This material model, which is based on a new deformation theory of ortho tropic plasticity, has excellent potential for description of the biaxial softening phenomenon found in…
Spray drying techniques have been applied to improve the solubility and dissolution rate of poorly water-soluble salicylic acid. Spray drying of the acid dispersed in acacia solutions resulted in as much as a 50% improvement in the solubility of the product. Solubility improvement was closely related not only to the c…
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…