Materials Literature
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Durable sisal fiber cement composites reinforced with long unidirectional aligned fibers were developed and their mechanical behavior was characterized in a multi-scale level. Tensile tests were performed in individual sisal fibers. Weibull statistics were used to quantify the degree of variability in fiber strength a…
Abstract. Microstructure and mechanical properties of ultrafine-grained (UFG) samples of the Al-Cu-Mg-Si aluminum alloy processed by high pressure torsion have been investigated. Transmission electron microscopy and electron back scattering diffraction were used for structural investigations. The ultimate tensile stre…
The full-wave validation and experimental demonstration of a NRI metamaterial composed of an array of dielectrically insulated metal wires embedded in a ferrite substrate are reported. The simulation and experimental setup places a wedge-shaped NRI metamaterial in a parallel-plate waveguide structure and measures the…
The disadvantage of conventional concrete is the high when the weight of concrete and density of the normal concrete is in the order of 2200 to 2600 kg/m 3 .This heavy weight is some extent in uneconomical structural material. Attempts have been made in the past to reduce the self weight of concrete to increase the ef…
To address the problem of lightning struck on overhead transmission lines, a kind of jet stream interrupter gap lightning protection device (JSIGLPD) installed in the overhead transmission lines was developed. When lightning struck on the transmission line and cause AC flashover of insulator strings, the device is abl…
Direct current (DC) flowing into a power transformer from the directly earthed neutral of star-connected winding affects the magnetizing current, resulting in several undesirable effects on a power transformer. An improved magnetic circuit model is presented in the paper for the DC biased power transformers, which tak…
Problem statement: Abrasive is one of key influencing factors on the polished surface quality in Chemical Mechanical Polishing (CMP). Solid abrasives in CMP slurries are easy to cause polishing scratches. It is well known that reducing the hardness of abrasives would improve the polished surface quality. Therefore, th…
Ce(IV) doped anatase TiO2 nanoparticles (CDTs) were prepared and the underlying mechanism by which CDT nanoparticle enters into cell and its cytotoxicity were investigated in a human hepatocellular line L02 cell. The results showed that CDTs can enter into cytoplasm of L02 cell via endocytosis and nonendocytic ways. L…
A simple caloric model of the equation of state is proposed to describe thermodynamic properties of solid materials with the phase transitions being ignored and with the minimum possible number of parameters as the initial data. Thermal oscillations of the crystal lattice are described by the Debye approximation. The…
The present paper is aimed to investigate theoretically the quantum confinement in Cd1−xZnxS‐related quantum dots with x the atomic fraction of Zn. For both electrons and holes, we have calculated the excited bound states with use of the spherical geometry model and assuming a finite potential at the boundary. For ele…
Transparent single-walled carbon nanotubes (SWCNT) based flexible conductive coatings have found great application potentials in flexible displays and solar cells. In this paper we report a simple method for the fabrication of this type of conductive coatings. By using plasma treatment of the flexible polymer substrat…
Hydrophobic organic-inorganic hybrid composite suspensions were prepared by mixing hydrophobic octylsilyl titanium dioxide particles having average diameter of 35 nm with drying oil or moisture cure room temperature vulcanization silicone gum in volatile silicone. They were spread on a glass plate by using a linear mo…
We studied acetonitrile vapour inclusion behaviour for flexible single-crystal hosts [M2(bza)4(pyz)]n (M = Rh2+ (1), Cu2+ (2); bza = benzoate, pyz = pyrazine) by adsorption experiments and single-crystal X-ray analysis of the inclusion state. Independent of metal ions, the flexible single-crystal hosts smoothly and re…
This study was undertaken to develop a numerical process that can be used as a quality criterion to determine the technological value of the Egyptian cotton varieties, which in turn would denote the end-use of their fibers. However the material used in the study comprised the 6 Egyptian cotton varieties Giza70, Giza80…
A new 3methyl1phenyl4arylazo5pyrazolone and 1, 3diphenyl4arylazo5pyrazolone have been synthesized and characterized by elemental analysis, IR, mass and 1H NMR spectra. The acid dissociation constants (pKa values) of the investigated ligands were determined potentiometrically and spectrophotometrically. The stability c…
A simplifled extended composite right/left-handed (SE- CRLH) transmission line (TL) is proposed for dual-band applications. The dual-band bandpass behavior is realized with a simplifled non-dual circuit with only two broadband balanced conditions. The dispersion relation and frequency response of SE-CRLH TL are analyz…
The transmission electron microscope (TEM) has evolved into a highly sophisticated instrument that is ideally suited to the characterization of advanced materials. Atomic-level information is routinely accessible using both fixed-beam and scanning TEMs. This report briefly considers developments in the field of atomic…
In present paper, the fusion of metal nanocrystals on TiO2 nanowires is studied and utilized to synthesize bimetallic nanoparticles on nanowires. Cationic polydimethyl aminoethyl methacrylate (PDMAEMA) brushes are grafted onto TiO2 nanowires, and palladium nanocrystals are produced by polymer brush-bound PdCl(4)(2-) a…
Potentiometric CO2 sensors based on NASICON (Na1+xZr2Si2PO12) were fabricated by combining with a Li2CO3-BaCO3 (1:2 in molar ratio) auxiliary phase. The CO2 sensing properties of NASICON (x = 0, 1, 2, 2.75) sensors were investigated under dry condition at 450°C. The electromotive force (EMF) values of NASICON sensors…
A high quality GaN Schottky barrier photodetector (PD) was prepared on patterned sapphire substrates (PSSs) by metallorganic chemical vapor deposition. Compared with the PD prepared on a conventional flat sapphire substrate, we can reduce dark current and enhance responsivity. Under a −2 V applied bias, noise equivale…