Materials Literature
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In the cosmetic industry, many inorganic powders are used, and for their easy handling and improvement of functional properties of the powders, various things are demanded. Generally, powder characteristics and surface phenomena concerning the inorganic powders depend largly on their surface properties. Therefore, sur…
An account is given of the R & D activity at Bhabha Atomic Research Centre on transformation toughened zirconia ceramics. Special reference is made to the preparation of zirconia powders by the hydrothermal route. The details of compaction of powders obtained by hydrothermal and co-precipitation routes and their sinte…
Following the 1st report, we extend our investigations of a combined cycle with hightemperature helium-gas and steam turbines.Recently in thermal power generation a great interest is focussed on the combined cycle, which has been positively introduced. The combined cycle with high-temperature helium- gas and steam tur…
Corrosion resistance of sintered SiC ceramics, which were prepared using defferent sintering methods, crystal structures and sintering aids, were tested in pure water, 0.1kmol·m-3 H2SO4, and 0.1kmol·m-3 LiOH at 300°C for 50h. It was found that the corrosion resistance of SiC ceramics prepared using pressureless sinter…
Stainless steel pipes whose inner surface is electro-polished have become applied as the pipings for purified gases used in the semiconductor processing. In order to maintain the purity of the gases, the piping is required not to release particles and impure gases from its surface and to have excellent resistance to c…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Mohamed S. El‐Genk, Dmitry Paramonov; An analysis of thermionic space nuclear reactor power syste…
In this paper, a numerical method ‐ Spline Function has been used to determine the parameters of adsorption fixation kinetics onto granular activated carbon surface (PICA NC60) in a range of aromatic compounds in batch reactor. This description allows us to examine the validity of Adams‐Bohart model (AB). The test com…
A study was undertaken of the formation of solid solutions with the garnet structure in the systems M3Ga5O12–M′O2–CaO (where M = Y3+, Nd3+ and M′= Zr4+, Ti4+). Synthesis of these compounds was performed by the traditional ceramic route as well as through hydroxide coprecipitation. Characterization was mainly carried o…
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…
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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…