Materials Literature
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Composite membranes, consist of Nafion and surface-modified mordenite as inorganic filler functioned as ethanol barrier, were prepared and used for direct ethanol fuel cell (DEFC). mordenite was modified using gamma-glycidoxypropyltrimethoxysilane (GMPTS) which has the epoxide group and 3-mercaptopropyl-trimethoxysila…
Fiber reinforced polymer matrix composites have extensively been used in various fields such as aerospace industries, automobiles, marine, and defense industries because of their high strength/weight ratios. In this paper, effect of silane modified iron (III) oxide nanoparticles on the mechanical properties of Kevlar…
Along with the development of aviation industry, airplane emission pollutants is becoming more and more serious environment problem. All the pollutants of aero engine emission, the airplane and engine manufacture companies ,Airlines and environment protection departments care about most is how to reduce the NOx emissi…
This work investigates the effect of epoxidized low molecular weight natural rubber (ELMWNR) in silica-filled NR compounds on processing, mechanical and dynamic mechanical properties. The ELMWNRs with mol% epoxide groups varying from 0-50 and molecular weight in a range of 50,000-60,000 g/mol were prepared from depoly…
Abstract Photocatalytic activity of TiO2 and ZnO nanopowders is studied depending on the morphology, grain sizes and method of synthesizing. Photocatalysis of the prepared powders was evaluated by degradation of the methylene blue aqueous solution. Absorbance spectra (190-100 nm) were measured during exposure of the s…
Traditional FFT show good trait in steady-state harmonic testing, while it turn low accuracy when testing harmonic with voltage sag or transient, and can not illustrates the information on amplitude-time plane. The discrete wavelet transform is suitable for transient harmonic signals. However it is not intuitive and h…
Oxidation tests of 18%Cr-oxide dispersion strengthened (ODS) steels with and without 5%Al were carried out in air at 700900 °C for time period up to 540 h. No minor alloying elements affect the oxidation behavior and the Al concentration between these ODS steels is a main difference. Cr2O3and (Fe,Cr)3O4spinel oxides e…
In the present work, acrylonitrile butadiene styrene based composites filled with aluminum, boron carbide and glass spheres particles were prepared. Fillers contents in the ABS were 5, 10, 15, and 20 wt%. The mechanical and wear properties of the polymer composites were investigated. The structural properties of the c…
The harmonic balance method is applied to study the DC bias phenomenon of the power transformer in frequency domain. The harmonic balance equation has been set up, establishing the electromagnetic coupling model. Every frequency solution of the exciting current and the magnetic flux can be calculated by updating the r…
Mechanisms of ultrasonic absorption by wood are considered. The difference between the nonuniformity of temperature changes within a sample and on its surface upon ultrasonic treatment is shown. A method for measuring this nonuniformity using the thermoelectric properties of wood is proposed.
A joint preliminary study has been performed to elucidate the capability of IPMC-based structures mimicking the behavior of biological systems. The structural deformation in response to an applied voltage is described within a nonlinear physics-based model of IPMC actuators. A characteristic of the model is the varyin…
A series of carbazole substituted poly (dimethylsiloxane) (PDMS) was synthesized by hydrosilylation reaction of 9-vinyl carbazole into PDMS structure. It was then cross-linked with vinyl trimethoxysilane by condensation reaction. The fabricated product display increasing in refractive index with increasing carbazole c…
Robust and reliable interconnect and effective heat management are two major concerns in the high-speed and high-power integrated circuit. Carbon nanotube (CNT) exhibits amazing mechanical, thermal and electronic properties due to the unique structure. Those superior features make CNTs preferable and promising for app…
In this work, the interactions between tungsten (W) and silicon carbide (SiC) in Sigma SiC fibers at high temperatures were characterized using scanning and transmission electron microscopy. These fibers could have the potential for use in fusion-related applications owing to their high thermal conductivity compared w…
Influence of the main process parameters on the hot wire chemical vapor deposition (HW-CVD) of polytetraethylene (PTFE) films in the hexafluoropropylene (HFPO)-argon system at low pressure as well as the gas flow structure in the reactor and its effect on the precursor conversion was evaluated. It was found out that t…
Ni 80 Fe 20 (at. %), Co, and Ni epitaxial thin films of fcc(100) and fcc(111) orientations are prepared on single-crystal substrates by using an ultra-high-vacuum radio-frequency magnetron sputtering system. The influence of the magnetocrystalline anisotropy on the magnetostriction behavior under in-plane rotating mag…
The effect of machined workpiece surface topography and surface integrity were studied. Modifications of surface layers after mechanical surface treatments were also reviewed. Conflict ideas exist in publications about which parameters can better define fatigue endurance. The traditional one was Arithmetic Average Rou…
In order to study the corrosion characteristics of 16Mn and X42 steel in natural seawater, the indoor contrast corrosion experiments are carried out in seawater by electrochemical method. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) techniques are employed to investigate the corrosion ele…
In this paper, the gate-all-around carbon nanotube field effect transistor (FET) with elliptical shaped gate is studied with numerical simulation to explore the gate dielectric variation effects. The simulations are carried out with the three dimensional self-consistence Poisson-Schrodinger equations with the non-equi…
In the present paper, controlled rolling and controlled cooling of Fe-C-Mn-Si multiphase steel was conducted by a laboratory hot rolling mill. The results show that ferrite (grey), granular bainite (black) and retained austenite (white) and/or MA islands (white) are observed in a color etched LOM micrograph. The prese…