Materials Literature
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Abstract The behavior of the semicrystalline polymer polypropylene (PP) was studied in the pre‐necking domain. Mechanical tests were performed to characterize its viselastic and its viscoplastic behavior. The usual approach for studying metals was adopted to investigate the effect of heterogeneities caused by spheruli…
An oxygen sensor based on yttria-stabilized zirconia with Ni-NiO mixture as a solid reference electrode for high temperature applications has been fabricated and tested. During high temperature use Ni reacts with inner Pt electrode and Pt lead wire, and affects the output signal of the sensor leading to a limited life…
Blends of linear low density polyethylene (LLDPE) and LLDPE grafted maleic anhydride (LLDPE-g-MA) were prepared by melt mixing. The surface of cast films with different contents and types of maleated PE were characterized through contact angle and wetting tension measurements, as well as attenuated total reflection IR…
A criticality accident occurred on September 30, 1999, in a conversion test facility at the JCO Tokai site. The accident was triggered by pouring an 18.8% enriched uranyl nitrate solution into a precipitation vessel beyond the critical mass. The accident continued for about 19 hours before the criticality could be sto…
Tracking and erosion behaviors of high temperature vulcanized (HTV)-silicone rubber (SIR) of 0.5 to 6.0 mm thicknesses were investigated in order to obtain the optimum thickness for enhancing tracking and erosion resistance under various leakage current levels. Under low leakage current, thinner samples showed a highe…
Temperature-dependent in situ W L3-edge X-ray absorption spectroscopy has been performed at 20–500 °C to investigate the geometric environment and electronic structure of tungsten upon the transformation of electrochromic peroxopolytungstic acid to tungsten trioxide. The temperature-dependent variation of the coordina…
Erosion of the divertor and first-wall plasma-facing components, tritium uptake in the re-deposited films, and direct implantation in the armour material surfaces surrounding the plasma, represent crucial physical issues that affect the design of future fusion devices. In this paper we present the derivation, and disc…
Polyaniline doped with R-(−)- or S-(+)-camphorsulfonic acid produces an inexpensive chiral substrate; the presence or absence of water can be used to invert the dopant-induced circular dichroism (CD) absorbance at 450 nm, shedding light on conflicting literature reports.
Shielding of magnetic fields at power frequencies has been investigated by computation and experiment. Different types of low-cost soft magnetic laminations (low-carbon steel, nonoriented Fe–Si, grain-oriented Fe–Si) and different shield geometries (plane, U-shaped and box-like) have been considered. The shielding fac…
Holographic grating originating from photothermal effects in guest-host liquid crystals was characterized using heat-conduction analysis and Fraunhofer’s diffraction theory. The refractive index distributions, which are caused by interference light illumination and photothermal optical nonlinearity, were determined by…
In this study, the physical and electrical properties as well as thermal stability of sputter-deposited titanium carbide films as diffusion barriers for Cu metallization were investigated for the first time. With thermal annealing in ambient for 30 min, the unpatterned Cu (2000 Å)/ (500 Å)/n-Si structure was found to…
Single crystals of barium bismuth titanate (BaBi 4 Ti 4 O 15 ) and BaBi 4 Ti 4 O 15 partially substituted with V 5+ and Ba 2+ for Ti 4+ and Bi 3+ sites, respectively, at 5 at.% (Ba 1.2 Bi 3.8 Ti 3.8 V 0.2 O 15 ), were grown using slow cooling. The incorporation of vanadium into the B-site of the layered pseudo-perovsk…
Inelastic neutron scattering was used to study the temperature (T) dependence of the lattice excitations in La0.7Ca0.3MnO3. An optical Jahn-Teller phonon exhibits continuous but anomalous damping with increasing temperature in the ferromagnetic-metallic phase and collapses above the Curie temperature Te (240 K). We at…
The effect of grain-boundary dislocation transformations on diffusion in nanocrystalline solids is discussed. A theoretical model describing the enhancement of diffusion processes associated with the climb of grain-boundary dislocations in nanocrystalline solids is developed.
Vascular grafts in animal models have been used extensively in the microsurgical laboratory, and the rat offers an excellent source of graft to meet these needs. In this study, we compiled a list of vessels that were previously identified in experimental literature for use as vascular grafts in the rat model. We then…
Poly(vinyl alcohol) (PVA), fully or partially hydrolyzed, was reacted with D,L-lactic acid and glycolic acid in different conditions to synthesize polymers with pendant lactate and glycolate groups. Various degrees of grafting were obtained. 1H- and 13C-NMR analysis as well as thermal and mechanical methods were used…
The crystal structure, surface morphology, compositional homogeneity and electrical properties of barium strontium titanate (BST) thin films are investigated. The films were deposited on bare silicon and platinum coated silicon substrates by spin coating process. The precursor solution with Ba/Sr ratio 70/30 was prepa…
"Foreword." Science and Technology of Advanced Materials, 2(1), p. 1
A new classification of algae based on five kingdoms of living organisms is presented up to the ordinal level, they are distributed it three kingdoms and include 19 phyla, 31 classes and 107 orders. The classification makes use of micromorphological, ultrastructural and phycochemical characteristics of algae. Typified…
Fine magnetite powders dispersed in polymer solution were encapsulated from an oil-in-water emulsion prepared by an emulsification process employing a porous glass membrane and subsequent evaporation of the solvent. Styrene-based copolymers were dissolved in a magnetic fluid, and then continuously pushed through the p…