Materials Literature
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Shaped silver nanoparticles with sphere, wire and dendrite were prepared by sonoelectrochemical deposition from an aqueous solution of AgNO3 in the presence of ethylenediaminetetraacetic acid disodium salt (EDTA) and polyvinylpyrrolidone (PVP). The diameter of spherical silver particles was about 30 nm. The diameter o…
Corrosive conditions in BWRs are determined mainly by hydrogen peroxide (H2O2). Then, a high temperature, high-pressure H2O2 water loop was fabricated to identify the effects of H2O2 on corrosion and stress corrosion cracking of stainless steel. By changing concentrations of H2O2 and O2, in situ measurements of electr…
Abstract Hydrotalcites (HTs) or layered double hydroxides (LDHs) are in the literature also described as anionic clays, due to their layered structure with a charge opposite to that of smectites. Most of the naturally occurring hydrotalcites are members of the pyroaurite-sjögrenite group. Manasse (1915)proposed in 191…
Un nouveau genre de diatomees, Labellicula, est decrit a partir de quelques echantillons de sol provenants de l'ile de la Possession (archipel Crozet, Subantarctique). Ce genre naviculoide presente certainesaffinites avec Brachysira, Diadesmis, Fistulifera, Neidium et Luticola mais presente aussi une combinaison de ca…
Mechanical milling (MM) process is applied to SUS316L austenitic stainless steel powder and a nano-duplex structure formation behavior is investigated. A nano grain structure with BCC phase forms in surface region of the powder milled for 720 ks. Those nano grains have the grain size of less than 20 nm. The (α+γ) nano…
We report on numerical simulations of the grain-boundary varistor behavior recently observed in -doped of high purity. The aim of this study is to disclose the nature of the nonlinear electrical properties of the grain boundaries in oxygen ion conductors. Under small voltages , the simulation shows a linear current-vo…
different polymeric matrices; polyethylene glycol (PEG) as thermoplastic, epoxy as thermoset and styrene butadiene rubber (SBR) as elastomeric matrices have been studied in this work. Magnet powder was crushed mechanically and sorted in the particle sizes of 74-100, 2-10, and 1 microns. PEG Nano-powder was also prepar…
The article presents new test results concerning objective and subjective hand evaluation of 25 textile fabrics (woven and knitted). Textile hand was assessed subjectively by hand-picked judges panel, which in the way of direct survey assessed the fabrics in respect to 10 properties (smoothness, softness, thickness, r…
This study deals with quantitative and qualitative interpretation of transmission FTIR spectra of aged model paper samples (pure cellulose and cellulose modified with aluminium sulphate) to prepare the basis for a kinetic model of cellulose degradation involving a mixed hydrolytic and oxidative mechanism.The ageing ex…
The synthesis of multivalent dendritic cluster glycosides of mannopyranosyl-6-phosphate is presented. Poly(amido amine)-based dendrimers of 0.5-3.5 generations, containing carboxylic acid peripheral functionalities, were utilized so as to install 4, 8, 16 and 32 mannopyranosyl-6-phosphate residues at the peripheries o…
Abstract H-assisted plasma chemical vapor deposition (HAPCVD) realizes control of deposition profile of Cu in trenches. The key to the control is ion irradiation to surfaces. With increasing the flux and energy of ions, the profile changes from conformal to subconformal and then to an anisotropic one, for which Cu mat…
This paper presents the initial project developments of a new integrated approach to partial discharge (PD) monitoring of HV plant through the combined simultaneous application of UHF and IEC60270 technology. The benefits and limitations of both techniques are briefly described, and consideration of the power and capa…
In recent years polymer nanocomposites have attracted wide interest with regard to enhancing polymer properties and extending their utility. It has been found that the dielectric properties have a close relationship with the interfacial behavior between the fillers and the polymer matrix in such composites. In this pa…
Half-Heusler compounds TiCoSb, ZrCoSb, HfCoSb were prepared by a spark plasma sintering (SFS) technique. Their thermoelectric and thermophysical properties were measured. The band gap energy estimated from the electrical resistivity becomes small in the following order: TiCoSb (0.16 and 0.40 eV), ZrCoSb (0.14 eV), HfC…
A fully aromatic unfluorinated polyimide (PI) exhibiting high transparency in the visible region and small thermal expansion was designed and prepared. The formation ability of charge transfer (CT) interactions in PIs estimated using the density functional theory clarified that polychlorine-substituted benzidines shou…
The syntheses of new ceramic superionic materials based on Bi 2O3 (BIMEVOX and δ-Bi2O3), their elemental analyses, thermodynamical stability, and electrical properties are presented. The materials show high ionic conductivities (ca. 0.1 S/cm) at a relatively low temperature (600 °C), which makes them applicable as ele…
IHI is currently investigating applications of thermoelectric conversion systems based on the usage of radiant heat for industrial furnaces. The thermoelectric module units, which have been connected to a water-cooled jacket wall inside an electric resistance-heating-type industrial furnace, receive the heat originati…
Using π-orbital tight-binding model, we investigate the transport properties of a coiled carbon nanotube (also called carbon nanotube spring), which we construct by connecting carbon nanotubes periodically in three-dimensional (3D) space. Theconductance is quantized due to the translational symmetry in the coiled dire…
The effects of nickel content and heat treatment conditions on the creep strength of precipitation-strengthened 15Cr ferritic steel were investigated. The creep strength of the 15Cr ferritic steel was drastically improved by solution treatment and water quenching. However, over the long term, the detrimental effect of…
In situ acoustic emission (AE) was coupled with linear-sweep voltammetry from anodic to cathodic potentials to study 5N5-aluminum behavior in 4 M aqueous potassium hydroxide solution. We clearly highlight a correlation between the AE and electrochemical signals. Moreover, the different types ( e.g. , in terms of frequ…