Heat Treatment: Structure and Properties of Nonferrous Alloys
Heat treatment, structure, and properties of nonferrous alloys , Heat treatment, structure, and properties of nonferrous alloys , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
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Improvement of photoelectrochemical hydrogen generation by surface modification of p-type silicon semiconductor photocathodes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImprovement of photoelectrochemical hydrogen generation by surface modification of p-type silicon semiconductor photocathodesRaymond N. Dominey, Nathan S. Lewis, James A. Bruce, Dana C. Bookbinder, and Mark S. WrightonCite this: J. Am. Chem. Soc. 1982, 104, 2, 467–482Publica…
Zirconium in the Nuclear Industry
Description This publication provides information on the performance of zirconium and zirconium alloy components in nuclear application. Nuclear physicists have discovered that some materials -- zirconium, for example, provide much better neutron economy than conventional materials such as stainless steels.
Data analysis techniques in x-ray photoelectron spectroscopy
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTData analysis techniques in x-ray photoelectron spectroscopyAndrew. Proctor and Peter M. A. SherwoodCite this: Anal. Chem. 1982, 54, 1, 13–19Publication Date (Print):January 1, 1982Publication History Published online1 May 2002Published inissue 1 January 1982https://pubs.acs…
Local inertial effects in dynamic fragmentation
A general definition of dynamic fragmentation can encompass any impulsive process which partitions a body of material into discrete domains. Two examples are fragmentation due to brittle fracture under impact loading and fragmentation due to shear banding in shock-compression plastic deformation. In application, predi…
The use of electronically counted microspheres in absolute diatom analysis
A method of estimating diatom concentrations in sediment samples by the addition of known quantities of microspheres is described. Polystyrene or glass microspheres can be used and their concentration in suspensions can be rapidly calculated with an electronic particle counter. Test results are compared with results f…
Temperature Programmed Reduction
The success or otherwise of catalyst preparation or modification depends on the availability of suitable characterization techniques to determine the condition of the catalyst. There are many techniques available for this purpose including x-ray powder diffraction, electron microscopy, photoelectron spectroscopy, and…
Constitutive Equations for the Rate-Dependent Deformation of Metals at Elevated Temperatures
Approximate constitutive equations are proposed for use in the analysis of the rate-dependent deformation of metals at temperatures in excess of a homologous temperature of 0.5. The constitutive equations are formulated within the scope of some recent theories of elastoviscoplasticity with internal variables, but empl…
The determination of hydroxyl by infrared absorption in quartz, silicate glasses and similar materials
L'analyse des calibrations existantes pour différentes substances montre que l'intensité de l'absorption des I.R. de 3 µm par les hydroxyles dépend de la fréquence. Quand on prend en compte le facteur d'anisotropie γ, une raie unique de calibration pour le coefficient d'absorption molaire intégral I peut, en première…
Amphiboles and Other Hydrous Pyriboles
Most of Volume 9A of Reviews in Mineralogy treats amphiboles and other hydrous pyriboles as isolated systems. It reviews the structural complexity and resulting chemical variability and diversity of petrologic behavior of amphiboles, whereby Volume 9A contains a hefty dose of petrology and in contrast, Volume 9B is de…
Temperature Dependence of the Structure Factor ofAs2Se3Glass Up to the Glass Transition
The temperature dependence of the structure factor of glassy ${\mathrm{As}}_{2}$${\mathrm{Se}}_{3}$ has been measured. Surprising results were found for the first peak, which shows a large increase in intensity from 40 K to the glass transition temperature, ${T}_{g}$; in contrast the second peak decreases in this rang…
Spatially modulated phases of a one-dimensional lattice model with competing interactions
The authors study a two-parameter one-dimensional lattice model embedded in three-dimensional space at T=0, that has indirect oscillatory interactions between neighbours. It can describe succession of modulated structures separated by first-order phase transitions. Qualitative agreement with experimental data obtained…
EPR study of molecular ordering in liquid crystal: NOBA
The molecular ordering in the nematic and smectic-C phases of the liquid crystal p-n-nonyloxy benzoic acid (NOBA) is investigated. The phase transition from isotropic to nematic phase is of first order. In the nematic phase over a wide range of temperatures the order parameter remained constant. In the low temperature…
Photo-stimulated luminescence and thermoluminescence in CaSO4: Dy
Photo-stimulated luminescence provides a method of radiation dosimetry in which repeated readouts from an irradiated sample are possible without erasing the initial dose information. It is found that in CaSO4:Dy, photo-stimulated luminescence as well as thermoluminescence processes are both originating from the same t…
The stability and energies of planar faults in the DO19 ordered structure
The stability of planar faults on possible slip planes in the DO19 structure is investigated using crystal symmetry considerations and the restoring force calculated for these faults. It is found that the superlattice intrinsic stacking fault on the basal plane and the antiphase boundaries on prismatic {1010} and {112…
Piezoelectric Relaxation in Ferroelectric AgNa(NO2)2
The complex piezoelectric constants, d 21 , d 22 and d 23 , of ferroelectric AgNa(NO 2 ) 2 have been measured by two quasi-static methods; one is the optical interferometric method and the other is based on a comparison with the piezo-electric constant of quartz. The measurement covered the temperature range from 40°C…
A study of the arsenic, black phosphorus, and other structures derived from rock salt by bond-breaking processes. II. Band structure calculations and the importance of the g a u c h e effect
Band structure calculations based on the extended Hückel method order energetically the 36 arsenic-like structures having the NaCl size unit cell in a way which is compatible with the observed crystal structures. Black phosphorus is the most stable of the 36, and the arsenic layer type is number seven. Energy differen…
Trends in the electron-phonon coupling parameter in some metallic hydrides
We present an evaluation of the electron-phonon coupling parameter $\ensuremath{\lambda}$, using the McMillan formalism, for several classes of stoichiometric mono- and dihydrides with a metallic underlying fcc structure. We calculate the electronic term $\ensuremath{\eta}$ and use experimental estimates for the phono…
X-ray photoelectron spectroscopy studies of Ag photodoping in Se-Ge amorphous films
The Ag-deposited Se80Ge20 (at. %) amorphous films are found to show a large chemical shift (∼1.2 eV) in the Se 3d level toward lower binding energies and to form a Ag2Se phase on the surface region. The chemical shift of the Se 3d level by Ag photodoping becomes large with increasing UV exposure (15 mW/cm2) and is sat…
Extinction coefficients and integrated intensities for linear- and bridged-bonded CO on platinum
For the first time, infrared integrated absorption intensities and extinction coefficients have been determined for both the linearly adsorbed (high frequency-HF) and the bridged-bonded (low frequency-LF) forms of CO on Pt. Platinum dispersed on η-Al2O3, SiO2, SiO2–Al2O3, and TiO2 was characterized by both hydrogen an…