Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract An apparatus is described for studying the fatigue of rubber strips under repeated simple extensions in different atmospheres. The fatigue life is shown to be greatly increased in vacuo for vulcanizates of natural rubber and SBR. The effect of oxidation inhibitors and radical acceptors has been examined; they…
While the moisture permeability index and insulation value define the heat transfer characteristics of fabric systems under equilibrium conditions, such conditions do not always occur. Moisture may accttmulate in clothing during periods of activity due to unevaporated sweat or sweat which has evaporated from the skin…
A study was made of t he thermal behavior in a vac uum of polystyrcne, polytetra fluoroethvlcne, poly (a-m et h y 1 s tyrcne), polypropylene, polyisobutylen(', and poly (meth yl methacrylate), when pyrolized at 500, 800, and 1,200 .0C. The v olatile products of degradation were collected and fractionated, and the frac…
The internal friction peak for nitrogen in dilute solutions in very pure chromium occurs at 160°C for ∼1 cps but is unstable due to partial precipitation of nitrogen. Interpretation of internal friction data at low frequencies and elastic aftereffect measurements in terms of the theory of Snoek gives the lattice diffu…
ABSTRACT Creep of narcotized Metridium and Calliactis body-wall at constant tensile stress has been studied quantitatively. It was found to be reversible, and seemed to be controlled by the mesogloea. Its course could be represented by equations of the form where the retardation time τ was about 1 hr. for Metridium an…
An experimental investigation of the interdiffusion behavior of gases in a low permeability graphite was performed by sweeping the opposite faces of a graphite septum with helium and argon at uniform pressure and measuring the diffusive flux of both gases. The objectives were to ascertain the diffusion mechanism, to v…
Triple-layer antireflection coatings on glass (n≈1.5) can provide a broader region of low reflectance than single- or double-layer coatings. Of the possible triple-layer combinations, the quarter-half-quarter construction has been found to be most suitable for the visible and near infrared. Calculations of reflectance…
Investigations during the last few years have shown that a number of phases, especially borides, of the seventh and eighth group metals are isomorphous with cementite or crystallize in structures closely related to that of cementite. In this paper the recently obtained structural data are summarized and discussed. The…
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 M. G. Holland; Thermal Conductivity of Several Optical Maser Materials. Journal of Applied Physic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNuclear Magnetic Resonance Spectra of Porphyrins*Winslow S. Caughey and W. S. KoskiCite this: Biochemistry 1962, 1, 5, 923–931Publication Date (Print):September 1, 1962Publication History Published online1 May 2002Published inissue 1 September 1962https://doi.org/10.1021/bi00911…
Abstract Data are reported for the temperature coefficient of the retractive force for a natural rubber sample which had been crosslinked by irradiation. These measurements differ from those previously reported in allowing a longer interval for the attainment of equilibrium, in covering a wider range of elongations, a…
Interactions between identical or nonidentical rare-earth ions that result in the quenching of fluorescence of Eu3+ or Tb3+ have been studied. Comparison of the intensities of emission of Eu3+ as a function of its concentration in various oxides indicates that interactions that result in the quenching of emission from…
Based on the theory of anisotropic elasticity, the stress field of a single dislocation, the force between two parallel dislocations, and the stress field of various types of infinite dislocation walls and arrays are fully analyzed for a hexagonal crystal. The attraction sector of an edge dislocation with respect to a…
Phase relations at liquidus temperatures in the system La 2 O 3 ‐TiO 2 were studied in air. The existence of two previously unreported compounds, La 2 O 3 . TiO 2 and 2La 2 O 3 ‐TiO 2 , is postulated on the basis of X‐ray and microscopic examination of crystalline samples, and in the case of La 2 O 3 .‐TiO 2 , on a ma…
Article Untersuchungen über die gleichmä§ige Auflösung und den Lochfra§ von Aluminiumelektroden* was published on September 1, 1962 in the journal Zeitschrift für Physikalische Chemie (volume 34, issue 1_4).
Abstract Es wird mit Hilfe von Röntgenintensitätsmessungen bestätigt, daß in der CaF 2 ‐Phase von Zirkondioxyd, dem 15 Mol‐% CaO zugesetzt wurde, die Ca‐Ionen sich statistisch auf die (000) + flz‐Lagen verteilen, während entsprechend dem Gehalt an Ca im Anionenteilgitter Leerstellen auftreten. Durch EMK‐Messungen wird…
Electrical resistivity results were obtained from boron-doped natural and synthetic diamond over the temperature interval from 88 to 293\ifmmode^\circ\else\textdegree\fi{}K. Resistivities ranged from \ensuremath{\gg}${10}^{14}$ \ensuremath{\Omega}-cm for undoped diamond to ${10}^{\ensuremath{-}2}$ \ensuremath{\Omega}-…
The Zr--H binary system was investigated principally by use of pressure composition isotherms, room-temperature and high-temperature x-ray diffraction, and metallography. In addition to the two zirconium allotropes (alpha and beta), and two stable hydride phases (delta and epsilon), a metastable hydride phase (gamma)…
Abstract It is well known that the polyisoprene of hevea latex undergoes considerable changes after its emergence from the tree. These changes take the form of chain scission or crosslinking depending on the conditions obtaining (see all References). In the solid state the predominant reaction that takes place on stor…
It is shown that the inhomogeneous demagnetizing field occurring in uniformly magnetized, nonellipsoidal samples can be described by a generalized demagnetizing factor. The demagnetizing factor is a tensor and, in general, is different in different parts of the sample. The diagonal sum of this tensor field is unity at…