Materials Literature
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The microstructure of transverse and longitudinal sections of a commercial AZ91 alloy processed by equal-channel angular pressing was examined by transmission electron microscopy. A high dislocation density and large number of deformation twins were observed in the investigated material. The {102}(matrix) // {012}(twi…
Diamond-like carbon films (DLC) were prepared by radio-frequency plasma-enhanced chemical vapor deposition (RF-PECVD) at a frequency of 13.56 MHz using methane (CH 4 ) and acetylene (C 2 H 2 ) at different RF powers. Optical emission spectroscopy (OES) was carried out to investigate plasma chemistry. The intensity of…
We investigated dry etching methods for the patterning of nanosized Ge 2 Sb 2 Te 5 (GST) patterns using high-density helicon plasma etching system. It was found that GST patterns of 10-nm-order size could not be formed in a suitable way owing to the damage of undesirable under-cut when the etching process was performe…
Abstract— The moving‐picture quality of several LCD modules was evaluated by using the quantitative parameter, normalized blurred edge width (N‐BEW), or the N‐BEW value normalized by time (N‐BET), measured and calculated by the developed time‐sequence‐image integration system which has taken LCD‐response characteristi…
Abstract The porosity of a propylitized granite from Charroux (France), with no fractures or sealed fractures, increases by more than four times from the unaltered (0.3%) to the altered rock (1.4%). This evolution results from several local porosity modifications which occur at different scales in the rock: (1) at the…
Aluminum films are vacuum-evaporated onto a ClO 4 - -doped green polycarbazole (PCz) film. The appearance of the resulting aluminum/PCz junctions drastically changes with time; the time-dependent fading of the metallic white color and green color of the PCz is observed during their storage in air, and colorless films…
Abstract Nylon‐11 was crystallized into different crystalline phases by appropriate methods. The α phase was obtained by precipitating nylon‐11 in 1,4‐butanediol. The melt crystallized sample at 175 °C gave pseudohexagonal phase. The γ phase was obtained by casting nylon‐11 in trifluroacetic acid (TFA). The change in…
Layer-by-layer (LbL) films have been produced with poly(o-ethoxyaniline) (POEA), chitosan and chitosan-poly(methacrylic acid) (CS-PMAA) nanoparticles. Because the adsorption of LbL films depends on ionic interactions and H-bonding, optimized conditions had to be established for the growth of multilayer films. Unusuall…
Electric field/space charge profiles obtained using the laser-intensity-modulation-method (LIMM) are presented for XLPE samples machined from power cable insulation cross-linked using dicumyl peroxide. The samples, 110 mum thick with vacuum-evaporated aluminium electrodes, were subjected to DC fields of 48 kV/mm and b…
Purpose This work sets out to characterise the protective properties of conformal coatings and how they degrade. Design/methodology/approach The approach dosed several commercial coatings with two different contaminants, a synthetic generic flux mixture of dibasic acids in both a solvent‐ and water‐based carrier, and…
Abstract A new hyperbranched aromatic poly(ether sulfone) with sulfonyl chloride terminal groups was prepared by polycondensation of a new AB2 monomer (1), 4,4′-(m-phenylenedioxy)bis(benzenesulfonyl chloride). The polymerization was carried out in nitrobenzene at 120 °C for 3 h in the presence of a catalytic amount of…
Abstract Differences in equilibration rates among crystals of different sizes may be used to deduce paleofluid changes over time if the crystal-growth mechanism is known. To explore isotopic equilibration rates as a function of illite growth, we studied B-isotope changes during illitization of smectite. Montmorillonit…
The magnetic convection of paramagnetic fluid is studied in a strong magnetic field. The fluid in a cubic enclosure is heated from one vertical wall and cooled from the opposite one. The fluid is the 80% mass aqueous solution of glycerol with 0.8 mol/kg concentration of gadolinium nitrate hexahydrate to make the worki…
Aerosol OT/water exhibits a lamellar phase over a wide range of concentrations. We show, by magnetic resonance (NMR) and scanning electron microscopy (SEM), that the morphology of the lamellar phase varies significantly across that range and that the rate of equilibration depends strongly on concentration (25, 33, and…
In this paper a methodology for applying thermoelastic stress analysis (TSA) to superelastic, nickel-titanium (Nitinol), shape memory alloy self-expanding stents is described. A test rig has been designed that allows the stents to be loaded under a pseudophysiological loading of internal pressure. High-resolution ther…
An explicit solution for the longitudinal and transverse polarizability of the symmetric dielectric intersecting double sphere is obtained as a rapidly converging series of integral operators, which is fast enough for real time calculation in Java Applet.
Using an integrated measurement system, partial discharge activity has been recorded simultaneously in terms of radiated energy and IEC60270 apparent charge. Correlation between these two quantities can yield important information regarding the shape of the underlying PD pulse. It is proposed that this new measurement…
The effect of the microstructural parameters and the nonmetallic-inclusion content in a steel on its service properties is analyzed for the rail steels of experimental batches that are produced in Russia and abroad and exhibit different service durabilities upon full-scale tests. The dendritic structures of these stee…
Sodium sulfur battery is one of the most promising candidates for energy storage application. It displays high power and energy density, temperature stability, low cost and good safety. This presentation summarizes the recent development of sodium sulfur battery, especially their applications in energy storage.
Abstract A systematic study of cathodoluminescence (CL) emission arising from free exciton recombination in diamond is given. CL spectra of free exciton emission from diamond under high excitation conditions were used to characterize properties of ultradense exciton gases at quasi‐thermal equilibrium. Theoretical spec…