Materials Literature
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Abstract Some physical properties of linear polydimethylsiloxanes have been studied. The states and transitions in polydimethylsiloxanes have been investigated by using the method of dynamic heat capacity and a thermomechanic method in the temperature range from −150 to +200°C. The temperature dependence of primary an…
A study was made of the effect of surface preparation and pretreatment on the oxidation of zone‐refined nickel from 500° to 700°C. “Clean,” hydrogen‐reduced surfaces, maintained essentially free of impurities such as S, Si, Fe, and C, oxidized at a faster rate than air‐exposed electropolished or etched annealed nickel…
The total conductivities of a series of ThO 2 ‐ base electrolytes have been determined over a wide range of oxygen activity in atmospheres of H 2 / H 2 O / Ar mixtures. At 1200° and 1400°C and low oxygen activities, a significant conductivity contribution corresponding to hydrogen ion (proton) conduction was found for…
Abstract Vorliegende Arbeit gibt einen zusammenfassenden Bericht zur Kinetik der Keimbildung, wobei besonders der nichtstationäre Verlauf dieses Prozesses untersucht wird. Auf Grund einer eingehenden Diskussion des Keimbildungsmechanismus wird. der Einfluß aktiver Unterlagen, wie auch die Art der Ausgangs‐ und der sic…
The n‐type conductivity in commercially available stabilized zirconia electrolyte tubes was studied from 600° to 1400°C using three independent techniques: emf measurements on H 2 ‐ H 2 O mixtures, coulometric titration of oxygen out of liquid silver or copper, and electrolyte breakdown in gas mixtures with low oxygen…
Abstract Recent experience with a variety of materials in biomedical applications has demonstrated the importance of material form and shape in determining tissue response to implants. An investigation was made of the effect of pore size on the response of loose connective tissue to porous methacrylate implants. With…
Abstract Die Struktur der Verbindung (Ba 2 )( 12 ) (Ni II Te VI )( 6 )O 6 wurde mit Hilfe von Einkristall‐Röntgen‐Beugungsdaten ermittelt und bis zu einem R‐Wert von 2,9% verfeinert. Ba 2 NiTeO 6 kristallisiert rhomboedrisch (Raumgruppe R 3 m) mit a = 5,797 und c = 28,595 Å für die trigonal aufgestellte Elementarzelle…
Low-temperature hydrothermal reactions of metakaolinite have been investigated, with and without additions of silica, by use of the bases LiOH, NaOH, RbOH, and CsOH and also the mixtures NaOH + LiOH, NaOH + KOH, KOH + LiOH, and NaOH + Me4NOH. Over certain temperature and composition ranges reproducible crystallisation…
The deformation and fracture of Zircaloy-4 and pure zirconium sheets having strong (0002) textures were studied under plane-strain compression at temperatures from 20° to 800°C. Zircaloy-4 underwent a ductility transition from limited strain (0.1 to 0.3) to extensive fracture-free flow (> 0.6) at about 300°C; pure zir…
Progress of Theoretical Physics Vol. 50 No. 2 (1973) pp. 529–544On the Extension of the Resonating Group Treatment of Composite Particle Scattering to the Heavy System Hisashi Horiuchi Progress of Theoretical Physics Vol. 50 No. 5 (1973) pp. 1561–1578On the Inner Repulsive Effect Due to the Pauli Principle between Nuc…
(1972). Foam Separation Methods. Separation and Purification Methods: Vol. 1, No. 1, pp. 117-198.
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 F. M. d'Heurle, N. G. Ainslie, A. Gangulee, M. C. Shine; Activation Energy for Electromigration F…
A quantitative optical microscopy study was made on the grain size distribution in one-, two- and three-dimensions in recrystallized titanium (0.2% Oeq) by the linear intercept, planimetric and serial sectioning methods. Analysis of the results revealed that all the size distributions were logarithmic-normal and that…
Fibrous crystals of polyethylene are produced by crystallization from agitated xylene solutions. In this paper, the following properties of macroscopic aggregates of such crystals, grown under carefully specified conditions, and having well-defined morphologies, are investigated: (a) regularity and magnitude of long p…
Clear, colorless glasses that absorb roentgen rays were prepared by melting together compounds yielding silica, barium oxide, boric oxide, and alumina. Barium oxide made the glasses radiopaque and gave the desired refractive index. Boric oxide lowered the melt viscosity, and alumina tended to stabilize the glasses. So…
We give an extensive theoretical and experimental discussion of the statics and dynamics of the Freedericks transition of nematic MBBA films in a magnetic field. The experimental data are obtained from measurements of the anisotropy of the thermal conductivity across the film both in the « planar » and « homeotropic »…
A detailed description is given of certain results of domain structure theory which have been obtained recently and which have not, so far, been treated in monographs or reviews. A large part of the article consists of an analysis of the fundamentals of the theory; the properties of domain structures which are indepen…
Research Article| March 01, 1972 Authigenic Aluminosilicate Minerals in the Tuffaceous Rocks of the Green River Formation, Wyoming RONALD C SURDAM; RONALD C SURDAM Department of Geology, University of Wyoming, P.O. Box 3006, Laramie, Wyoming 82070 Search for other works by this author on: GSW Google Scholar RONALD D P…
A general expression for the local field in anisotropic crystals is derived and applied to crystals of iodoform, benzene, naphthalene, anthracene, bi-phenyl and phenanthrene. The principal refractive indices of anisotropic crystals are related to components of an effective molecular polarizability tensor via anisotrop…
Abstract Organic‐free specimens of 5 metals were prepared and characterized by parameters indicating their relative surface charge, surface texture, and surface energy prior to evaluation of their degree of thromboresistance. For the materials studied, there was no predictive correlation between the pre‐implatation el…