Materials Literature
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Contents: An engineering approach to textile structures. One-dimensional structures: yarn geometry. Form and fiber arrangement in twisted yarns (Hearle). Theory of the extension of continuous filament yarns. Observed extension and breakage of continuous filament yarns. Theory of the mechanics of staple fiber yarns. Ob…
Preface 1. Introduction 2. Point defects 3. Extended defects 4. The primary event 5. The collision cascade 6. Point defects in irradiated metals 7. Point defect clusters in irradiated metals 8. Impurity damage Bibliography Index.
Inhomogeneous broadening has been observed in resonance lines in solids over the wide range of energies spanned by nuclear magnetic resonance, electron spin resonance, optical, and M\"ossbauer methods. The broadening arises from random strains, electric fields, and other perturbations from the defects in the lattice c…
Share Icon Share Twitter Facebook Reddit LinkedIn Reprints and Permissions Cite Icon Cite Search Site Citation Leonid V. Azároff, Richard B. Zipin; Elements of X-ray Crystallography. Physics Today 1 January 1969; 22 (1): 99. https://doi.org/10.1063/1.3035379 Download citation file: Ris (Zotero) Reference Manager EasyB…
Two wear-out type failure modes involving aluminum metallization for semiconductor devices are described. Both modes involve mass transport by momentum exchange between conducting electrons and metal ions. The first failure mode is the formation of an electrically open circuit due to the condensation of vacancies in t…
Many of the polymers used in composite systems and in other applications are cross-linked or thermoset polymers. How do such cross-linked polymers differ in properties from the better-understood linear or thermoplastic polymers? This review paper attempts to answer this question. The paper is written from the practica…
The current state of polaron theory as applicable to transition metal oxides is reviewed, including problems such as impurity conduction where disorder plays a role. An estimate is given of the conditions under which polaron formation leads to an enhancement of the mass but no hopping energy. The binding energy of a p…
Abstract Polymere mit phthalocyaninrtiger Struktur ergaben sich durch Reaktion von einigen schwefelhaltigen Komplexen, die vier Nitrilgruppen enthalten, mit Kupferacetylacetonat bei höherer Temperature. Die Leitfähigkeiten der Polymeren liegen zwischem 6,3·10 −3 und 2,1·10 −10 Ohm −1 cm −1 . Die Aktivierungsenergie ze…
Ninety-one samples of diatomaceous rocks collected from seven separate sections of the Miocene and Pliocene strata of Oga Peninsula. Akita Prefecture, were studied. The samples are from, in ascending order, the upper part of the Onnagawa Formation, the Funakawa Formation, the Kitaura Formation, the Wakimoto Formation…
Abstract The synthesis of N‐vinyluracil, N‐vinylthymine, and N‐vinyladenine is described. The general procedure consists of the conversion of the corresponding nucleric acid bases to their N‐hydroxyethyl compounds, followed by chlorination to the N‐chloroethyl compounds and dehydrochlorination to the N‐vinyl derivatie…
Examination of the organic matter in some modern and fossil oolites has shown that it contains protein, with a high content of acidic amino acids. Artificial oolites from a water-processing plant contained no amino acids. The protein matrix may influence the formation of natural oolites by concentrating calcium ions.
Resistivity and Hall-effect measurements in ${\mathrm{Eu}}_{0.95}$${\mathrm{Gd}}_{0.05}$S give evidence for the onset of a well defined conduction band with critical scattering coexisting with magnetic impurity states.
Summary The microstructure of London Clay from several localities and depths was examined in thin section under the polarizing microscope. Except where severely weathered the clay was found to have a strong preferred particle orientation and frequent microscopic discontinuities. These features are compared with those…
Oxidation of octahedral ferrous to ferric iron in soil vermiculite clays and biotites increases the potassium-fixation capacity of vermiculites and increases the difficulty of replacing interlayer potassium in biotites. This unexpected effect is believed to be related to an increase in the attractive forces between po…
The magnon density of states of ferromagnetic Gd${\mathrm{Cl}}_{3}$ in an external magnetic field has been observed by means of high-resolution optical spectroscopy. The relevant transitions arise from a single-ion transition mechanism, but the initial (magnon) and in some cases the final (exciton) states of the trans…
Single crystals of BaS have been grown and irradiated with neutrons, producing an intense $F$-center spectrum with a spectroscopic splitting factor, $g=1.9637\ifmmode\pm\else\textpm\fi{}0.0005$. The isotropic part of the hyperfine interaction $A$ is 41.0\ifmmode\pm\else\textpm\fi{}0.2 and 36.4\ifmmode\pm\else\textpm\f…
We have computed the renormalization of the conduction-electron energy in a degenerate ferromagnetic semiconductor at zero temperature due to the virtual emission and reabsorption of spin waves. We find that as a result of the difference between the up- and down-spin Fermi momenta, this renormalization is quite small.…
The lattice parameters and the quadrupole splittings of the room-temperature Mössbauer spectra of the cubic A 2 FeSbO 7 pyrochlores (A = Sm, Eu, Gd, Tb, Y, Er, Lu) have been found to vary linearly with the Templeton–Dauben radii of the A 3+ ions. The variation of the quadrupole splitting can be correlated with the pos…
The polarization characteristics of the blue-copper luminescence in a cubic ZnS:Cu, I (Cl, Al or Ga) single crystal grown from the melt were investigated. The polarization with particular azimuthal dependences is observed under polarized characteristic excitation, indicating that the center has its own symmetry lower…
The recovery of neutron-irradiation-induced defects in tungsten has been investigated via isochronal resistivity studies after irradiations from 8.5\ifmmode\times\else\texttimes\fi{}${10}^{17}$ to 1.5\ifmmode\times\else\texttimes\fi{}${10}^{21}$ $n$ ${\mathrm{cm}}^{\ensuremath{-}2}$ (${E}_{n}>1$ MeV). These studies…