Materials Literature
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The new azo benzene polyurethane (CAPU) was synthesized by diazo coupling reaction with 1,4-Diaminobenzene, sodium nitrite, and R(-)-3-chloro-1,2-propanediol. The solubility was measured with several organic solvents. Some mechanical properties of CAPU, such as tensile strength and ratio of elongation at break, were i…
Susceptibility to cracking of the as-cast C-Mn-Cr-Nb steel was studied by laboratory rolling. The variable parameters were the heating temperature (1150 - 1340 °C) as well as the rolling temperature (950 - 1150 °C). Final microstructure of the free-cooled samples was constituted by bainite, pearlite and ferrite with d…
Nanoparticles comprising chitosan-graft-poly (methyl methacrylate) (CS-g-PMMA) copolymer were successfully synthesized in aqueous solution by using potassium diperiоdatоnickelate (Ni (IV)) as an initiator. The nanoparticles were characterized in terms of Fourier transform infrared (FTIR), dynamic light scattering (DLS…
Modified nanosilica (M-SiO2) by coupling agent (KH570, γ-MPS) with C=C bond reinforced ethylene-octene copolymer (POE) nanocomposites were prepared by melt blend, and then irradiated by γ-rays under nitrogen. The results of the crosslinking degree measurement revealed that the crosslinking degree of POE/modified nanos…
Control of the dispersion characteristic, mainly in the position of the band-gap, of a novel type of printed microstrip High Impedance Surface (HIS) is presented. The HIS consists of a periodic arrangement of macro unit cells, which in turn are formed by sequential arrangement of similar elementary unit cells, each of…
The production of surface layers by laser application of complex alloy powders is considered. The strength of such layers in the vicinity of stress concentrators is investigated. Means of increasing the strength of the surface layer are recommended.
The effect of nanostructuring on physical and mechanical properties of metallic materials is studied. It has been established that the tested samples of nanostructured metal materials exhibit the specific strength and durability enhanced by 11-32 % which at the corrosion rate less than about 11 %. In the example of ti…
Synthetic rubber is used in automobiles for various applications. Tires, seals, gaskets, engine mounts, wiring cables and under the hood hoses are just a few examples. Synthetic rubber is a man-made material that uses several components as polymers, resins, carbon black, fillers, vulcanizing agents, reinforcement agen…
This paper introduces for the first time a 100um thick PZT actuator driven by single sided interdigitated electrodes that achieves a deformation of 15 μm which benefits from the piezoelectric nonlinearity and the reduced stiffness of the substrate. The deformation was at first simulated using a finite element model. T…
Highly transparent nanostructured gallogermanatebased glass and glass-ceramic materials are reported on page 364 by M. Allix and co-workers. These materials present nanoscale phase separations, whose size can be tailored depending on the nominal composition. The large variety of accessible compositions combined with p…
Thin film transistors (TFT) were constructed by inkjet printing of indium oxide semiconductor, which were annealed at the temperature of 200-300°C. Good morphology of printed indium oxide films was achieved and the printed thin film transistors exhibited acceptable performances above 250°C of annealing temperature. Fu…
We present a characterization study to develop self-polarized, highly pyroelectric lithium tantalate thin films obtained by RF magnetron sputtering. A preliminary work is done on the bottom electrode to reduce short-term variations of the pyroelectric behavior. Then, the influence of pressure and of deposition tempera…
The contribution deals with comparison of microstructure and fatigue properties of synthetic nodular cast irons with a different ratio of steel scrap in a charge. Chemical composition of individual meltages was regulated alternatively by ferrosilicon (FeSi) and carburizer or metallurgical silicon carbide (SiC). The fa…
The biocompatibility of the cellulose nanowhisker (CNW) from cellulase hydrolysis was evaluated in vitro for potential applications in drug delivery system. The assessments were comprised of cytotoxicity analysis and proliferation of human osteosarcoma MG-63 cells that were cultured with the resultant CNW. Some morpho…
In this paper, we propose a transmission line metamaterial super lens operating at 15.4 Ghz. The unit cell is built with a printed transmission line loaded with shunt inductor and series capacitor and it is designed to exhibit a negative refraction index equal −1. Such a microwave super lens can go beyond the diffract…
In this study, the effects of opening roller types and the navel types are examined on the resultant properties of yarns which are obtained from polyester. With this purpose in this study are used four different opening-rollers and five different take-off nozzle. Yarn tenacity, elongation, irregularity, hairiness, IPI…
Springback is an important factor influencing forming precision in bending process, which becomes more complex for micro metal foil due to the size effect existing. Bending springback is studied through the micro bending experiments designed with different grain sizes and foil thicknesses using T2 purple copper in thi…
The paper describes the rail failures occurring repeatedly in the same distance from the rail butt weldment. The results of this investigation, especially fractographic analysis of the fracture surface of rail, evaluation of its macrostructure and microstructure, EDS analysis and hardness measurements revealed that tr…
Low temperature co-fired ceramics (LTCC) technology becomes crucial in the development of various modules and substrates in electronic packaging, especially in wireless and microwave applications [. self-integrated component has laid basis on flexibility of design, wiring density and dependability for multilayer struc…
Magnetic properties, thermal stability and structure of the alloys - (Fe0.6Co0.4)86Hf7B6Cu1 (1), (Fe0.7Co0.3)88Hf7B4Cu1 (2) and (Fe0.7Co0.3)88Hf4Mo2Zr1B4Cu1 (3) obtained in the form of ribbons quenched from the melt were investigated after their nanocrystallization in the course of the thermal (TA) and stress (SA) ann…