Materials Literature
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The aim of this paper is to study the viscoelastic behavior of fibers during the woven fabric bagging process through a series of experiments and a mathematical model to simulate bagging under the testing conditions. Through a large number of computational experiments, the elastic modulus E 1 , viscoelastic modulus E…
Summary Surface podzolization has so far been diagnosed from morphological observations, selective extraction and mineralogical investigations. We studied this process in two Cambisol profiles developed in loess, one with a fibrimor humus and the other with a dysmoder humus, by characterizing the chemical composition…
A C T The purpose of the present study is to offer some information that will contribute to better understanding of subsurface crack initiation in b titanium alloys.Rotary bending fatigue tests were performed using smooth specimens of two materials that have been solution treated at different temperatures.Axial fatigu…
Abstract Octathexyloctagermacubane (1, thexyl = 1,1,2-trimethylpropyl) was synthesized by the condensation of trichlorothexylgermane with Mg/MgBr2, and structurally characterized by X-ray crystallography. As in the case of the thexyl-substituted octasilacubane, a ring-opening reaction followed by skeletal rearrangemen…
The aim of this work is to evaluate the efficiency of Activated Carbon Cloths (ACCs) as a refining treatment of membrane filtration in the case of effluent streams containing both dyes and suspended solids (SS) or colloids responsible for turbidity. It is divided into two parts. First, dye adsorption experiments are c…
The sintering of LaFeO 3 has been studied in the temperature interval 1100–1600°C in air. The effect of cation nonstoichiometry on densification, microstructure, and phase composition is emphasized. La 2 O 3 was observed to inhibit both sintering and grain growth. In Fe‐excess materials, exaggerated grain growth occur…
Electrochemical noise measurements were performed on electrodes made from a sample of AISI 304 (UNS S30400) stainless steel. Potential and current noise were measured under open-circuit conditions in a three-electrode system, one of the electrodes being maintained under load and acting as a working electrode. Two type…
Surface potentials can be regarded as diluted in space. By use of such a dilution model and Ericksen-Leslie theory we study the free relaxation of a nematic liquid crystal on an anchoring surface, after removal of an applied disorienting field. Depending on the initial distortions, we find either a relatively slow rel…
Isolated isothermal spheres of N gravitationally interacting points with equal mass are believed to be stable when density contrasts do not exceed 709. That stability limit does not, however, take into consideration fluctuations of temperature near the onset of instability. These are important when N is finite. Here w…
The microstructural evolution inside shear bands was investigated experimentally and analytically. A fine recrystallized structure (grains with 0.05-0.3 mu m) is observed in Ti, Cu, 304 stainless steel, Al-Li, and Ta, and it is becoming clear that a recrystallization mechanism is operating. The fast deformation and sh…
Sn-doped AgInO2 thin films were prepared on α-Al2O3(0001) single-crystal substrates by pulsed laser deposition. The films prepared under optimized conditions have high optical transmittance up to the near-ultraviolet region and high electrical conductivity. The optical band gap was estimated to be ∼4.1 eV, and electri…
Polarization-field and strain-field hysteresis loops with field-induced transition in two types of engineered domain configurations in perovskite-type oxide ferroelectrics were calculated in terms of the Landau-Devonshire type free energy. Using the free energy function truncated at the fourth order with respect to th…
Abstract A tire sidewall must have good resistance to fracture over a range of conditions covering rapid as well as slow crack growth. A vulcanizate based on a 50/50 natural rubber (NR)/ cis -butadiene rubber ( cis -BR) blend seems to meet this requirement. It retains the ability for longitudinal crack branching and h…
The particle size dependence of BaTiO 3 powder was investigated from the viewpoint of the crystal phase. The crystal phase of BaTiO 3 powder was transformed from tetragonal to cubic at a critical particle size of 0.1 µm at room temperature. With decreasing particle size, the Ba ions in the BaTiO 3 structure were absen…
Mild steel coupons were incubated in cultures of three different aerobic bacteria, viz. Rhodococcus sp. C125, Pseudomonas pulida mt2 and Streptomyces pilosus DSM 40714 and then exposed to a corrosive aqueous medium. A significant reduction in the corrosion rate was observed in a corrosive medium when the steel had bee…
A new methodology, which is compatible with the use of reactive organometallic reagents, has been developed for the use of carbosilane dendrimers as soluble supports in organic synthesis. Hydroxy-functionalized dendritic carbosilanes Si[CH2CH2CH2SiMe2(C6H4CH(R)OH)]4 (G0-OH, R = H or (S)-Me) and Si[CH2CH2CH2Si[CH2CH2CH…
The dependence of the Curie temperature of many ferroelectric perovskite solid solutions on the component concentration is nonlinear. Causes of the nonlinearity (limited solubility of components, ion ordering, influence of the morphotropic phase boundary, diffusion of the ferroelectric phase transition, frustration of…
The temperature variations of the cholesteric pitch in thin planar layers of cholesterics and their dependence on the surface anchoring force are investigated theoretically. It is shown that the temperature variations of the pitch in a layer are of a universal character. This is manifested in the fact that they depend…
The integration of a laser diode with a microlens on its emitting surface is introduced in this letter. Calculated results are based on integration of micro-cylindrical lens to laser diode. The lens is directly microfabricated on the emitting surface of the laser diode with operating wavelength 635 nm by focused ion b…
Results of optical birefringence, ultralow-frequency elastic, dilatometric, and dielectric measurements of lawsonite crystals are presented in a wide temperature range including two successive phase transitions $\mathrm{Cmcm}\ensuremath{-}{(T}_{1}=273 \mathrm{K})\ensuremath{\rightarrow}\mathrm{Pmcn}\ensuremath{-}{(T}_…