Materials Literature
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This study describes the dissolved state of colloidal silica in water and its adsorption properties on anion exchange resins (AERs) . A colloidal silica solution of 3% was prepared by ion exchange resin method from a sodium silicate solution. The colloidal silica in water formed about 10 nm particles in diameter. When…
An effective mixture method, which allows the treatment of polydispersed fluids, is presented. Within this method, correlation and thermodynamic functions are evaluated solving the multicomponent Ornstein–Zernike equation with the Rogers–Young closure. The method is tested by making comparisons with simulations and wi…
Alkaline solutions based on ammonium hydroxide and quaternary ammonium hydroxides are used widely in the wet processing of silicon wafers for control of ionic and particulate impurities following etching in acidic or buffered fluoride solutions. Etched silicon is hydrophobic in nature and alkaline solutions, because o…
To investigate the effect of gaseous elements on point defect cluster formation, such as dislocation loops and cavities, in-situ observation of dual-beam irradiation has been carried out for Ni and commercial stainless steels by using 1300 kV HVEM and 300 kV ion-accelerator facility. During dual-beam irradiation to Ni…
Abstract This paper describes detection by the AE (acoustic emission) sensor of partial discharge in a prefabricated joint, one of the accessories for XLPE cables which is composed of factory‐formed parts. Since the prefabricated joints can be installed in a short time, an increasing number of such joints has been use…
Polymer dispersed liquid crystal thin films have been deposited on glass substrates by the processes of polymerization and solvent evaporation induced phase separation. The electron and the optical polarization microscopies of the films reveal that PDLC microdroplets formed during the process of phase separation near…
In the past, solvents containing impregnation systems were in vogue, e.g. phenoloic‐alkyd, isophthalic polyester, silicone, etc. for electrical machines. The disadvantages of solvent borne impregnants are a higher dissipation factor (at elevated temperatures) and water absorption, etc., due to the presence of air void…
Among the most extensively used chemicals in the paper industry are wet strength resins. They enhance the performance of paper products ranging from tissue to board. Environmental concerns are questioning the use of several of these additives and a strong effort is being made to replace these chemicals with benign one…
National audience
The pitting corrosion of copper in cold water containing inhibitors composed of nitrilotris methylene triphosphonic acid (ATMP), benzotriazole (BTA) and zinc sulfate (ZnSO4) has been studied using immersion tests and electrochemical measurements. The results obtained are summarized as follows: 1) Pitting corrosion was…
Changing the timing of fluoride ion addition, passivation behavior at constant potentials and anodic polarization one for SUS 304 stainless steel were investigated in sodium sulfate aqueous solutions of pH 2-13, along with ICP analysis of solutions and XPS one of passive film. No pitting corrosion occurred for SUS 304…
In order to confirm the general applicability of the previously proposed GI (General Corrosion Resistance Index) value1), influence of temperature upon the corrosion rates of three series of stainless steels (Fe-Cr, Fe-Cr-Ni, Fe-Cr-Ni-Mo alloys) in 10.2mol·kg-1 H2SO4 aqueous solution was studied. Though measured parti…
Alumina ceramics containing various amounts of TiO2 were fabricated by sintering in humid reducing atmospheres and also in air. The sintered samples were treated at various temperatures in reducing atmospheres. The electrical resistivity measurments and microstructural observation were conducted on the obtained sample…
A single crystal of Nd:KYF4 is grown by top- seeded solution growth. Absorption and fluorescence spectra reveal multiple Nd sites in the material.
The deformation of equivalent size and shape glass, asbestos and Kevlar∗aramid fibrils, when subjected to bending or longitudinal compressive loads, was estimated based on published mechanical properly data and established mechanical analysis. Based on this analysis, Kevlar fibrils are expected to deform more easily t…
The insulating capability of a typical Fiberglas insulation slab exposed to different types of environment on each side of the slab was evaluated, based on theory that takes into account heat conduction, natural convection, phase changes, and gas infiltration. The results are analyzed and combined with recent theoreti…
Abstract This article discusses the susceptibility of carbon steels to hydrogen-induced cracking, solidification cracking, lamellar tearing, weld metal porosity, and heat-affected zone (HAZ) mechanical property variations. The composition and mechanical properties of selected carbon steels used in arc welding applicat…
The pitting corrosion of copper in cold water containing inhibitors composed of amino trimethylene phosphonic acid (ATMP), benzotriazole (BTA) and zinc sulfate (ZnSO4) has been studied by the immersion test and electrochemical measurements. The results obtained are summarized as follows: 1) the pitting corrosion of co…
Yuhuan Xu. North-Holland, Amsterdam, London, New York, Tokyo. 1991. xiv + 391 pp., 177 Figures, 50 Tables. US $171.50, Dfl. 300.00, ISBN 0-444-883 54-1.”
Volcanic ash soils occur widely on South Kanto district. The surface soil has black color and high humus content. The parent material is derived from Holocene volcanic ash. There are some buried humic horizons resulted from a succession of volcanic ash accumulation and plant residue supply leading to the accumulation…