Materials Literature
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The present paper is focused on the microstructural stability of the Framatome-ANP M5™ (Zr-1%NbO) alloy. Thin foils were cut from M5 cladding tubes irradiated from 1 to 6 annual cycles in EDF PWRs, and examined by analytical transmission electron microscopy (TEM). The results show that within the wide range of irradia…
Steel risers for deepwater offshore oil and gas field developments are subject to seawater on the external surfaces, produced fluids on the internal surfaces and to fatigue loading. This paper reviews current knowledge of the fatigue behaviour of welded carbon-manganese steel for risers in relevant environments. A sub…
The properties of spinel oxides were studied in an effort to identify a potential solid oxide fuel cell (SOFC) interconnect coating which can hinder chromium oxide growth and evaporation as well provide acceptable electrical conductivity. Transition metal spinels based on aluminum, chromium, manganese and iron were ex…
The preparation of α,α,β-trisubstituted β-lactones has opened the route to living anionic ring-opening polymerization of these monomers. Therefore, transfer reactions due to hydrogen abstraction were limited and it is now possible to strickly control sample molecular weight. Moreover, living end-groups lead to the pre…
We present analytic formulations for studying the energetic behavior of hysteretic magnetic materials. One formulation reduces the full nonlinear diffusion problem to a linear problem through an optimization procedure. A second formulation attempts to approximate the magnetic permeability tensor by a complete set of f…
High performance electrical insulation materials and structures must be free from unwanted and unpredictable dielectric breakdown through the insulator as well as surface flashover along the interface between the insulator and the ambient or vacuum. The last decade has witnessed significant developments in the area of…
This paper reports that the novel high Tg low dielectric constant polymer with highly rigid coil-shaped main-chain structure was obtained for interlayer dielectric applications in microelectronics. The low dielectric constant of the polymer was induced by it that the coil-shaped main-chain structure with a bulky side-…
It is recognized that P25 is one of three polypeptide components of the fibroin synthesized in the larval silk gland (SG) of silkworm, having two glycosylated isoforms. In the present study, however, eight P25 isoforms were separated by proteomics, including two-dimensional gel electrophoresis of whole SG proteins, an…
Photoelectrochemistry (PEC) of straight and isolated nanowires arrayed on a copper foil is studied. A cathodic photocurrent is observed, which increases with the increasing negative bias of the film electrode, conforming to the p-type semiconducting nature of PEC studies on the core/sheath nanowires of nanowires coate…
The use of Raman spectroscopy to reveal the remarkable structure and properties of carbon nanotubes is briefly reviewed. Particular emphasis is given to the fact that a nanotube can be semiconducting or metallic depending on its diameter dt and chirality θ, and how Raman spectroscopy at the single nanotube level revea…
TlGaSe 2(1 - x ) S 2 x single crystals were grown by the modified Bridgman-Stockbarger method. None of the grown crystals had cracks and voids on the surface. The freshly cleaved crystals had mirror-like surfaces and there was no need for mechanical or chemical polishing treatments. The measurements were performed in…
Abstract The dehydration, dehydroxylation, decarbonization behavior and other phase changes of clay minerals have mainly been studied by thermal analytical techniques such as thermal gravimetric analysis (TGA), differential thermal analysis (DTA) and differential scanning calorimetry (DSC) ( Baraldi, 1990; Mackenzie,…
Alumina reinforced SiC particles and whiskers composites having high crack-healing ability and fracture toughness were prepared. The crack-healing behavior was systematically investigated. From the obtained results, the mechanisms of the composites were studied. For the crack-healing by SiC whiskers alone, partial bon…
Tensile tests were carried out for fine austenitic stainless steel wires with different grain sizes and wire diameters, and then the effect of wire diameter on the grain size dependence of tensile properties was discussed in terms of the behavior of dislocation slip near the material surface. 0.2% proof stress and tot…
A model of core losses, in which the hysteresis coefficients are variable with the frequency and induction (flux density) and the eddy-current and excess loss coefficients are variable only with the induction, is proposed. A procedure for identifying the model coefficients from multi-frequency Epstein tests is describ…
Combination of the pyrene and benzoylthiophene units constitutes an interesting approach to design bichromophoric photosensitizers with increased intersystem crossing quantum yield and enhanced selectivity. The potential of this strategy has been illustrated in the present work by using a model photoisomerization reac…
A cyclic tetranuclear [V(IV)O-Gd(III)](2) complex with VO and Gd ions alternately arrayed, behaves, from the magnetic point of view, as two independent dinuclear entities each having a S= 4 ground state, as a consequence of an active and ferromagnetic VO-Gd interaction through the double phenoxo bridge and a magnetica…
An incomplete factorial design with three independent variables at three levels of variation was used to evaluate the effect of the treatment with alkaline hydrogen peroxide concomitant with extrusion on some properties of oat hulls. The independent variables were hydrogen peroxide level, feed moisture and extrusion t…
The properties of a water-soluble TTF dicarboxyl salt, Na2[C10H6O4S6]·3H2O, have been explored. The cyclic voltammogram of the salt shows two quasi-reversible redox waves at E1/2(1) = 0.280 V and E1/2(2) = 0.556 V with ΔE (Eox − Ere) = 78 and 68 mV, respectively, in H2O–CH3CN (1∶1 v/v). The redox potential of this com…
Abstract Dielectric spectrometry was used to correlate microstructure of the filler with relaxation behavior of the polymer matrix in nylon/clay nanocomposites. Agglomerated, intercalated, and exfoliated composites were fabricated by extruding nylon 6 and nylon 12 with montmorillonite clays treated by two types of ami…