Materials Literature
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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 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…
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…
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…
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…
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…
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…
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.
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…
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…
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…
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…
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…
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…
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…
A new approach to the numerical modeling of inductive plasmas is presented. The governing magnetohydrodynamic equations are discretized in a second-order accurate finite volume manner. A straightforward pressure-stabilized flow field solver is introduced as an alternative to the staggered-mesh solvers used in traditio…
In previous works, the processing of plasticized PVC reinforced by cellulose nanocrystalline whiskers has been presented, as well as its mechanical behavior in the linear viscoelastic domain. The purpose of this work is now to evaluate and model the plastic behavior of such material. Compression tests are performed in…
We have constructed polymer-stabilized nematic liquid crystals by photopolymerizing diacrylate monomers in the nematic phase. The orientation of the liquid crystal was controlled by the polymer network. We studied the Freedericksz transition in these systems. Experimentally we studied the transition by measuring the c…
Laminated composite beams containing magnetostrictive layers are modeled as distributed parameter systems and the magnetostrictive layers are used to control the vibration suppression. Velocity feedback with constant gain distributed controller is chosen to achieve vibration suppression. A general formulation of the p…
Grinding lanthanum oxide (La 2 O 3 ) with Al 2 O 3 was conducted to investigate their mechanochemical reactions to form lanthanum aluminate (LaAlO 3 ) powder using a planetary ball mill. Grinding for 120 min allowed us to obtain single‐phase LaAlO 3 with a large surface area when transition alumina was used, whereas n…