Advanced Shape Memory Alloys Processed by Powder Metallurgy
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Miscibility, morphology and tensile properties of vinyl chloride polymer and poly(?-caprolactone) blends
The miscibility, morphology and tensile properties of three blend systems of poly(ε-caprolactone) (PCL) with poly(vinyl chloride) (PVC) and with two chlorinated PVCs (CPVCs) with different chlorine contents (63 wt% and 67 wt% of Cl) have been studied. Based on the shifts of single glass transition temperature, the Gor…
Synergistic action of vinyl triphenyl phosphonium bromide with various anions on corrosion of steel
The effect of mixtures of vinyl triphenyl phosphonium bromide containing various anions on the corrosion rate of steel in 0·5M H2 SO4 has been investigated. The inhibition mechanism has been studied by conducting electrochemical polarisation measurements. The inhibitor acts by covering the cathodic area of the metal s…
THERMAL DESORPTION OF SODIUM ATOMS FROM THIN SiO2 Films
The adsorption and thermal desorption of Na from thin SiO 2 films have been studied. X-ray photoelectron spectroscopy (XPS), angle-resolved XPS (ARXPS), low energy ion scattering (LEIS), temperature-programmed desorption (TPD), low energy electron diffraction (LEED) and work function measurements have been used to cha…
Synthese und strukturelle Charakterisierung von Borsubphthalocyaninaten
Halogenosubphthalocyaninatobor, [B(X)spc] (X = F, Cl, Br) bildet sich beim Erwärmen von Phthalodinitril mit Bortrihalogenid in Chinolin (X = F) bzw. dem jeweiligen Halogenbenzol. [B(C6H5)spc] wird aus Phthalodinitril und Tetraphenylborat bzw. Tetraphenylboroxid dargestellt. [B(Br)spc] dient für die Darstellung von [B(…
Material Constitutive Law for Large Strains and Strain Rates
This note comments on a strain rate pattern found in tensile tests. This strain rate pattern readily suggests that the Cowper-Symonds equation relating the static and dynamic flow stresses with the strain rate is not valid for a broad range of strains unless its coefficients change. A modification of the Cowper-Symond…
Transport properties and magnetism of a helically Hund-coupled conductor:β−MnO2
Transport properties and magnetic susceptibility have been investigated for single crystals of the magnetic conductor $\ensuremath{\beta}\ensuremath{-}{\mathrm{MnO}}_{2}.$ Resistivity, Hall coefficient, and thermoelectric power reveal the behavior of n-type metal with an anomalously small mobility. The transport prope…
Oxidation of 2-Chlorophenol in Water by Ultrasound/Fenton Method
One of the toxic and refractory pollutants formed during the color removal of fertilizer, chemical, and petroleum industrial effluents by chlorine is 2-chlorophenol (2-cp). The objective of this study is to investigate the effect of H2O2 and Fe2+ dosages on the decomposition of 2-cp using a coupled ultrasound/Fe2+/H2O…
Optimal design of a multi-couple thermoelectric generator
The performance of a multi-couple thermoelectric device as a generator is investigated. The general expressions of two important performance parameters, the efficiency and power output, are given. The - K characteristic curves of a thermoelectric generator are presented for some differently constrained conditions, whe…
Surface structure of isotactic polypropylene by X‐ray diffraction
Abstract With the glazing angle incidence of an X‐ray beam, the surface structure of compression molded isotactic polypropylene film was investigated by X‐ray diffraction. A comparison of the crystallinities between the surface and the bulk was made for films annealed in air at different temperatures and times. The cr…
An Overview: Vapor Phase Corrosion Inhibitors
When present as vapors, certain organic compounds offer inhibition against the corrosion of ferrous and nonferrous materials. The inhibitors include aliphatic, aromatic, cyclohexylamines, aminonitrobenzoates, heteroalkylated lower amines, etc. The mechanism of inhibition offered by these compounds was discussed and an…
Coprecipitation of CaCO 3 and CaSO 4
Abstract Coprecipitation characteristics of CaCO 3 and CaSO 4 were studied under various operating conditions. The investigations were carried out in temperature‐controlled batch tests. Coprecipitation results were compared with our experimental results of a single salt crystallization. It was found that the induction…
Preparation of silver behenate coatings to provide low- to mid-angle diffraction calibration
A method for the preparation of a well aligned silver behenate sample is described. Multiple (0 0 l ) diffraction peaks, (0 0 1) to (0 0 48), are easily observed using a conventional laboratory X-ray diffraction instrument.
Conformational issues in the characterization of proteins
The conformation of a protein refers to the three-dimensional arrangement of its constituent atoms. Since expression of the biological activity of a protein depends on its conformation, it is clear that full characterization of a protein involves an understanding of its three-dimensional structure. This review outline…
Effect of filler content and surface treatment on the tensile properties of glass-bead-filled polypropylene composites
The tensile properties of polypropylene (PP) filled with two A-glass beads with the same size, PP/3000 (glass bead surface pretreated with a silane coupling agent) and PP/3000U (no surface pretreatment), have been measured by using an Instron materials testing machine at room temperature, to identify the effects of th…
Electron-phonon interactions in insulating nanoparticles:Eu2O3
The temperature and particle size dependencies of the linewidth of spectral holes burned in the ${}^{7}{\stackrel{\ensuremath{\rightarrow}}{{F}_{0}}}^{5}{D}_{0}$ transition of ${\mathrm{Eu}}^{3+}$ ions in ${\mathrm{Eu}}_{2}{\mathrm{O}}_{3}$ are calculated and compared with experiment. The power-low temperature behavio…
Microturbine/Fuel-Cell Coupling for High-Efficiency Electrical-Power Generation
Microturbines and fuel cells are currently attracting a lot of attention to meet future users needs in the distributed generation market. This paper addresses a preliminary analysis of a representative state-of-the-art 50-kW microturbine coupled with a high-temperature solid-oxide fuel cell (SOFC). The technologies of…
Robust control of particulate processes using uncertain population balances
Abstract A general method is proposed for the synthesis of robust, nonlinear controllers for spatially homogeneous particulate processes described by population balances including time‐varying uncertain variables. The controllers are synthesized via Lyapunov's direct method on the basis of finite‐dimensional approxima…
Structural stability and equation of state of simple-hexagonal phosphorus to 280 GPa: Phase transition at 262 GPa
A structural phase transition and the equation of state of the simple-hexagonal (sh) phase, $P\ensuremath{-}V,$ of phosphorus were investigated at pressures up to 280 GPa using monochromatic synchrotron x-ray diffraction. The $P\ensuremath{-}V$ phase, which was stable above 137 GPa, has shown a structural transition t…
Catalytic Activity of Ir for NO-CO Reaction in the Presence of SO2 and Excess Oxygen
Abstract Catalytic performance of Ir catalysts for reduction of nitric oxide with carbon monoxide in the presence of SO2 and excess oxygen was investigated. NO was selectively reduced with CO on Ir/silicalite in an oxidizing atmosphere containing 1% to 10% O2 in the temperature range of 300-500 °C. The catalytic activ…