Materials Literature
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In the present work, a novel DC glow discharge source with configurations of hollow cathode electrodes had been developed. Discharge properties of the plasma source had been characterized. Experimental data indicated that the discharge current of the plasma source increased with the discharge voltage. The phase change…
Abstract A novel organic‐inorganic hybrid polyoxovanadate, [Ni(bpp) 2 ] 2 (V 4 O 12 ) (bpp=1,3‐bi‐4‐pyridylpropane), was hydrothermally synthesized from a mixture of NiCl 2 ·6H 2 O, NH 4 VO 3 , bpp, EtOH and H 2 O. The crystal structure consists of 2 ∞ [Ni(bpp) 2 ] 2+ , two‐dimensional networks interpenetrating perpen…
Tribological properties of nanostructural DLC/WC coatings were measured with a high temperature pin-on-disc CSM Tribometer in the range from room temperature (RT) up to 500 °C. The tribological performance was evaluated with respect to the wear rates of balls and coatings, friction coefficient and wear debris analysis…
This paper discusses the development of an ultrasound technique that enables the continuous, uninterrupted collection of time-resolved data for dissolution valency, interelectrode gap, and overpotential during electrochemical machining (ECM). These parameters, in combination with the dissolution current, give insight…
Abstract We have investigated the in vitro degradation of poly(lactic‐ co ‐glycolic) acid copolymer with a lactic to glycolic ratio of 65/35. The degradation studies were performed on solvent‐cast films of controlled thickness and shape. The samples were then incubated at 37 °C in phosphate buffered saline solution. T…
Abstract Effects of sodium hypophosphite (SHP) catalyst and water on nylon 612 melt‐phase polycondensation reactions were investigated using dynamic experiments with different catalyst levels (33, 113 and 249 ppm). The water concentration in the nylon melt was varied by altering the composition of a steam/nitrogen mix…
The conversion from one assembly structure to other composite assembly structures is valuable to both theoretical research and actual application in the nano/micromaterials science. In this paper, firstly, the flower-like calcium oxalate assembly structure was synthesized using a supramolecule template; then, through…
The silica-alumina sol bonding agent, prepared by the sol gel route from ethyl silicate and aluminium isopropanol, was characterized by X ray diffraction, infrared spectroscopy, thermogravimetric analysis, particle size distribution. It was utilized in the corundum based refractory castables. The properties and charac…
Intermetallic compounds capable of absorbing large amounts of hydrogen attract attention due to their applied significance in the production of chemical power sources. A variety of such compounds have been studied. The present paper gives some examples of hydrogen-absorbing intermetallides and describes their preparat…
Advanced composite materials and technologies, particularly direct manufacturing processes such as resin infusion are becoming the preferred manufacturing choice across the wind turbine industry. Philippe Christou, Technology Manager, EMEA, at Huntsman Advanced Materials looks at the latest developments.
Thermal oxidative decomposition of certain zinc porphyrin and phthalocyanine complexes was studied using an installation for thermal analysis, and kinetic parameters of the thermal oxidation of these compounds were determined. The introduction of peripheral alkyl substituents into porphyrin molecules enhances the macr…
In this study, porous silica (SiO 2 ) film is reinforced with carbon nanotubes (CNTs), which gets homogeneously dispersed in porous SiO 2 gel by ultrasonic stirring. The size of SiO 2 molecules is the same as that of nanotubes, so a fine CNTs/SiO 2 network is formed. Nanoindenters used to test the mechanical propertie…
Copper nitride thin films were deposited on glass substrates by reactive direct current (DC) magnetron sputtering at various N 2 -gas partial pressures and room temperature. X-ray diffraction measurements showed that the films were composed of Cu 3 N crystallites and exhibited a preferential orientation of the [111] d…
In this study, integrated multi-wall carbon nanotube (MWCNT) electrodes were prepared in the holes of glass directly by microwave plasma chemical vapour deposition (MWPCVD). The electrochemical behaviour of catechol at the integrated MWCNT electrodes was investigated. The oxygen plasma treated CNT electrodes had bette…
Three rare earth zirconates (Sm2Zr2O7, Gd2Zr2O7 and Er2Zr2O7) were prepared by solid state reaction. The crystal structure and ionic conductivity of these zirconates were characterized by X-ray diffraction (XRD) and complex impedance spectroscopy. The results show that Sm2Zr2O7 exhibits single-phase pyrochlore structu…
An attempt was made at increasing both toughness and rigidity by simultaneous toughening and reinforcement. Natural fiber-reinforced biodegradable polyester blend composites were prepared from modified and unmodified biodegradable polyesters blends with surface-treated and untreated jute fibers by melt mixing and subs…
The reaction of rare‐earth (RE; Y, Er, and Yb) chloride hydrates in 1,4‐butanediol at 300°C for 2 h gave mixtures of RE(OH) 2 Cl and RE 2 O 3 · x H 2 O, and the products were composed of irregularly shaped particles. A prolonged reaction (10 h) yielded a mixture of RE(OH) 2 Cl and RE 2 O 3 · x H 2 O for Er or Y, but p…
The morphology of fiber structures has been studied and the kinetics of their formation and growth at high homological temperatures upon superplastic deformation of the AMg6 and 1420 aluminum-based alloys containing viscous liquid-phase inclusions at the intercrystalline boundaries has been proposed. It has been found…
The stress evolution of Cu∕Co bilayers and multilayers sputtered onto oxidized Si(100) (SiOx) substrates has been studied by in situ substrate curvature measurements with the thickness of the individual layers ranging from 3 to 10 nm. In order to understand the stress developing during deposition, we investigated the…
Abstract X-ray diffraction shows that ordered interlayer structures form when high-charged Llano vermiculite is reacted with HDTMA-Br or HDTMA-acetate, but the structures differ from those given by low-charged vermiculites. The differences arise in two ways; firstly when both HDTMA + cations and HDTMA-Br (or -acetate)…