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。
In order to study the effect of grain size on void formation during high-energy electron irradiations, the steady-state point defect concentration and vacancy supersaturation profiles have been calculated for three-dimensional spherical grains up to three microns in size. In the calculations of vacancy supersaturation…
Abstract The spin–spin relaxation time T 2 and the fraction of short T 2 component for composites of natural rubber with carbon black prepared under various conditions have been measured by pulsed NMR. Effect of swelling with a solvent (CCl 4 ), carbon black species (SAF, HAF, SRF) with different surface areas, and di…
We present measurements and analysis of the magnetic properties of the degenerate magnetic semiconductor ${(\mathrm{GeTe})}_{1\ensuremath{-}x}{(\mathrm{MnTe})}_{x}$ for $0<x<0.5$. The measurements were made in fields of up to 55 kOe over the temperature range 1-350 \ifmmode^\circ\else\textdegree\fi{}K. The resul…
The 630-nm loss band recently identified in unclad fibers made from low-OH-content vitreous silica is shown to be introduced in the fiber-drawing process. The band has an absorptive component as well as resonance fluorescence whose peak intensity amounts to about 16% of the total losses. A red fluorescence was observe…
This paper is concerned with magneto-optical properties of EuO single crystals, doped with up to 5-at.% Gd. The optical absorption and the Faraday rotation have been measured above and below the magnetic-ordering temperatures and in various magnetic fields. In addition the reflectivity between 13 eV and 250 \ensuremat…
Abstract Apparatus has been developed for studying the development of crystallinity and orientation during the melt spinning of synthetic fibers. Tension in the fiber and temperature, diameter, and x‐ray diffraction patterns are measured as a function of distance from the spinneret for a running monofilament. Measurem…
In order to get an idea of the possible neutron small-angle scattering experiments with solutions of macromolecules at the high-flux reactor of the Institut Max von Laue–Paul Langevin at Grenoble, aqueous solutions of molecules with molecular weights from about one hundred to several millions have been studied. Changi…
The crystal structure of KTiPO 5 , determined by a simultaneous use of the tangent-formula method and the Patterson method, is described in space group Pn 2 1 a . Lattice constants are: a = 12.814 Å, b = 10.616 Å, c = 6.404 Å. This compound is a monophosphate whose chemical formula must be written KTiOPO 4 . Distorted…
The use of synchrotron radiation as an intense X-ray source for biological diffraction has only very recently been promoted into a long-term experimental programme. Here we report on some general and some detailed aspects of this development. In the case of small-angle studies on weakly scattering specimens at high ti…
Abstract From polarized reflection spectra of TEA(TCNQ) 2 single crystals at room temperature, quantitative values of the complex dielectric function ε(ω) and the optical conductivity σ(ω) in the range from the far infrared to the ultraviolet have been derived. The polarization of the vibrational bands almost exclusiv…
A survey, comparison, and critical analysis is presented of data compiled from the scientific literature concerning diffusion in copper-silver and copper-gold systems. Here the term ``copper alloy system'' is interpreted in the broadest sense. For example, the review of diffusion in the Cu-M system reports all diffusi…
(1974). A Proposed Standard Procedure for Static Muscle Strength Testing. American Industrial Hygiene Association Journal: Vol. 35, No. 4, pp. 201-206.
Abstract In the presence of maleic anhydride‐grafted polypropylene, marked dispersibility of the polymer blend of isotactic polypropylene and nylon 6 was obtained. This appeared to be caused by the formation of a certain graft polymer between maleic anhydride in polypropylene and terminal amino groups of nylon 6. The…
(The Nature of Polymer Glasses, Their Packing Density and Mechanical Behaviour).- The Nature of Polymeric Glasses.- The common glassy polymers.- The softening of polymer glasses.- Polymer melts and rubbers.- The crystallisation of polymers.- Amorphous isotactic polymers.- The morphology of amorphous polymers.- Packing…
Questions associated with the magnetic susceptibility of the d-band transition metals that are not magnetically ordered, i.e., that are neither ferromagnets nor antiferromagnets, are reviewed. The principal components of the magnetic susceptibility of the transition metals are discussed, theoretical estimates of these…
A series of experiments were carried out on growing depth hoar in our laboratory and observations made on depth hoar in a natural snow cover.Depth hoar crystals grew in snow when the snow was subjected to a consistent negative temperature gradient for a considerably long p3riod.Depth hoar crystals were classified into…
A spherical retarding-field electron energy analyser has been constructed to investigate the backscattering and transmission of electrons in the energy range 10-30 keV. It consists of full-spherical meshes with collector, and attains a resolution of about 2%. By using this apparatus, the energy distribution of electro…
The Holt relation d = Kϱ−1/2 between dislocation cell diameter d and average dislocation density ϵ is found to apply to Mo–50wt% Re when K = 4. Comparison with other published dislocation cell data shows that K does not remain constant, but varies from metal to metal. The effect of stacking fault energy on the K value…
Electrical conduction due to thermal activation of electrons from impurity sites is studied in the case of amorphous insulating films of large impurity densities. Considering a two-centre model the central barrier is assumed to be the current-limiting one in the whole field range for the investigation of the influence…
Motion of screw dislocations in b.c.c. lattices at 0 °K has been computer-simulated by applying shear stress on the {110} plane of a model crystal block, using systematically varied interaction potentials between atom rows parallel to the Burgers vector. For all the potentials used, the core of the dislocation moved i…