Materials Literature
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The cast hot working die steel is treated by mechanical vibration (MV) with a frequency of 50 Hz during the solidification process. The experimental results indicate that the MV may break off the dendrites growing from mould wall towards center in the steel during solidification. Therefore, the growth of the dendrites…
N,N′-Diethyl-3,3′-bicarbazyl(DEBC)and N,N′-Diphenyl-3,3′-bicarbazyl(DPBC)was synthesized by the oxidative coupling reaction. The electrochemical properties of DEBC and DPBC were characterized by cyclic voltammetric technique. The oxidation of DEBC occurred at 0.56 V and 0.8 V(vs. Ag/Ag+)and the reduction also at 0.47…
We have explored the effect of the presence of the sulfide layer on the corrosion performance of sulfidized brass-coated steel cords extracted from tires and squalene formulations. The corrosion performance of sulfidized brass cords extracted from various rubber formulations was tested in 3% NaCl electrolyte solution…
Abstract An extensive study on dynamic mechanical thermal analysis has been carried out to investigate the effect of filler‐filler and polymer‐filler interaction in cured ethylene‐octene copolymer reinforced by unmodified and modified silica. The silica was treated with trimethylolpropane triacrylate (TMPTA) or trieth…
In-situ energy dispersive x-ray diffraction on ZnS nanocrystalline was carried out under high pressure by using a diamond anvil cell. Phase transition of wurtzite of 10 nm ZnS to rocksalt occurred at 16.0 GPa, which was higher than that of the bulk materials. The structures of ZnS nanocrystalline at different pressure…
This paper summarizes observations about net carbon erosion and re-deposition in the limiter tokamak TEXTOR, and the divertor tokamaks ASDEX Upgrade and JET. The major carbon source in TEXTOR is the toroidal graphite belt limiter. Eroded carbon is mainly re-deposited on net deposition dominated areas of that limiter,…
This work considers the oxidation of ammonia (NH3) by selective catalytic oxidation (SCO) over a copper (Cu)-cerium (Ce) composite catalyst at temperatures between 150 and 400 degrees C. A Cu-Ce composite catalyst was prepared by coprecipitation of copper nitrate and cerium nitrate at various molar concentrations. Thi…
Novel giant liposome microcapsules have been fabricated based on aqueous gel cores encapsulated with a lipid bilayer. The method involves templating of lipid-stabilised water-in-oil emulsions after gelling the aqueous phase with a suitable hydrocolloid.
Polymers for aqueous film coating, such as hydroxypropyl methylcellulose (HPMC), often require the inclusion of a plasticizer to reduce brittleness and increase flexibility and ductility. A vinyl pyrrolidone/vinyl acetate copolymer (S630) was investigated for its influence on HPMC film coating parameters, comparing th…
A deactivated (aged under redox-cycled model TWC feed-stream) Pd/Ce(0.68)Zr(0.32)O(2) catalyst is remarkably reactivated when subjected to a high temperature oxidising treatment whereas this effect is only marginal for Pd/Al(2)O(3), which indicates the key role of such treatment in restoring the Pd-Ce(0.68)Zr(0.32)O(2…
A new model is described for cation transport in glass, in which below Tg a dynamic equilibrium exists between ‘open’ and ‘closed’ sites. Cations migrate by hopping into a relatively small number of open sites, which must be just the right size for them to occupy. This model accounts plausibly for the apparent constan…
Shape memory alloys (SMAs) can produce large strains when deformed (e.g., up to 8%). Heating results in a phase transformation and associated recovery of all the accumulated strain. This strain recovery can occur against large forces, resulting in their use as actuators. Thus an SMA element can integrate both sensory…
A new, non‐radiographic diagnostic has been developed that appears to provide information on multiple spall and damage layers in metals. The velocities of multiple layers (up to 5 in copper) can be determined using this method, with additional information possible on damaged material between layers at densities less t…
In this research, the effects of microorganisms on suede quality of double-face leather were examined. The bacterial numbers on salted sheepskin samples were found as 1.8x10 6 -4.3x10 7 cfu/g on solid medium and 1.9x10 6 -4.7x10 7 cfu/g on halophile medium containing 10-30% NaCl. However it was found that salted sheep…
Magnetic barkhausen emission measurements have been made on G86200 and G33106 steel specimens which have been case carburized to different case depths ranging from 0.5 to 1.5 mm (0.02 to 0.06 in.). The profile of root mean square voltage of the magnetic barkhausen emission signal plotted as a function of the voltage a…
Electric double-layer capacitors based on the charge storage at the interface between a high specific surface area activated carbon electrode and an electrolyte solution have been developed, and are widely used as maintenance-free power source for IC memories and microcomputers. Following the production of small size…
Copper corrosion in the presence of orthophosphate and chlorine has indicated the formation of a protective scale containing either CuO or Cu2O depending on the pH. Furthermore, the scale forms relatively quickly, after 15 days of immersion EIS showed very little change. The scale is initially porous, but after prolon…
Nanocomposites consisting of conducting polyaniline and clay minerals were successfully synthesized from mechanochemically intercalated anilinium fluoride; the nanocomposites prepared by the mechanochemical intercalation method contained much more polyaniline in the clay layers than those prepared by a conventional so…
Paper made from recycled, chemically pulped fibers typically has lower strength than paper made from virgin fibers. This was confirmed with respect to tensile and compression strength for an unbleached softwood kraft pulp. It was also confirmed that the addition of sucrose, at high concentration, to virgin pulp before…
Ring twisting gives the strength properties of yarn like friction spinning. Two multifilaments arranged in parallel and slightly twisted together form a loose structure with a slightly mixed arrangement of fibres. The structure of pneumatic textured yarn obtained by means of a stream of compressed air has a greatly mi…