Materials Literature
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According to the structure characteristic, comprehensive scoring method for corrosion evaluation is proposed for steel box girder. The effects of multiple factors of corrosion are considered comprehensively. Several existing indicators are selected for steel box girder. In addition, two new indicators are put forward…
Titanium dioxide (TiO2) nanofibers with different particle sizes were fabricated using an electrospinning technique. The nanofibers were prepared from a mixture of titanium tetraisopropoxide and polyvinyl pyrrolidone (PVP). The scanning electron microscope (SEM) and the transmission electron microscope (TEM) were used…
The conditions under which the nonuniform compensating field of the reflector of the mass-reflectron can be generated with an acceptable accuracy at the symmetry axis of the reflector and extrapolated to the radial neighborhood of the axial line are determined. The plots that illustrate the distribution of the calcula…
Nanotetrapod zinc oxide (ZnO) thin films have been deposited by thermal chemical vapor deposition (TCVD) technique. The films were deposited at 700°C and 800°C to study the temperature effect of physical properties of the nanotetrapod ZnO thin films. From XRD result shows the highest peak can observed from sample 700°…
We investigate the linear and nonlinear properties of a monolayer graphene embedded in a quarter-wave one-dimensional Photonic Crystal (1D-PhC) in terms of absorption and losses. In particular, we show that it is possible to achieve near-perfect narrow-band absorption when the monolayer graphene is sandwiched between…
The wettability of coating surface has important significance in the spreading situation of piece of sticky piece, and the welding state of Au-Sn solder. Wettability of solids is expressed with wetting contact angle. In this paper, by studying the wetting angles of the water droplets on the surface of the different ce…
MEMS is the acronym for micro electro mechanical systems. Recently optical techniques have become important for sensor applications. MOEMS combine MEMS and integrated optics to miniature optical sensors which can be used for mechanical sensing such as pressure, displacement, reverberation etc. In this paper we propose…
In recent years, many suppliers of telecom equipment have reported higher than expected rates of lightning damage to Ethernet and POTS ports connected to cables located entirely within the same building. There are three known mechanisms by which lightning surges can be coupled onto inside wiring, but these mechanisms…
The development of a new Short-Circuit (SC) tester for high current and high voltage power semiconductor devices is presented in this work. The proposed apparatus is provided with a Logical Control Unit (LCU) based on an FPGA digital circuit capable to control the system with 20ns programmable time resolution. The pow…
Reaction of molybdenyl(IV) oxide bis(2,4-pentanedionate) with N′-(3-ethoxy-2-hydroxybenzylidene)-2-methoxybenzohydrazide in methanol affords a mononuclear dioxomolybdenum(VI) complex containing MoO5N basic core. The complex has been characterized by various physicochemical techniques (IR and elemental analysis), and s…
The polyaniline-gold (PANI-AuNPs) fibrillar nanocomposites were prepared via a simple one-pot synthesis route in ethylene glycol (EG) medium. The morphology of PANI-AuNPs was characterized by transmission electron microscopy (TEM), and their electrochemical properties were studied by CV, TAF and EIS measurement using…
In this paper, Ni-coated graphene nanosheets (GNS-Ni) were synthesized by an in situ chemical reduction method. Such GNS-Ni sheets, by varying their weight fractions (0.05, 0.1 and 0.2wt.%) were successfully incorporated into the SAC305 solder matrix to fabricate composite solders through the powder metallurgy process…
Hybrid materials consisting of silver nanoparticles and thin films of cyan dyes have been investigated by means of scanning electron microscopy and absorption and fluorescence spectroscopy. It is detected that the molecular absorption and fluorescence of the dye become stronger in the presence of Ag nanoparticles, and…
Summary Two novel ATRP initiator (R‐X): 2‐bromo‐2‐methyl‐N‐(1‐phenyl‐ethyl)propanamide (I) and 2,2,2‐trichloro‐N‐(1‐phenylethyl)acetamide (II) were synthesized and characterized by 1H‐NMR, IR, EI. Also, crystal structures of (I) and (II) are reported. Compounds (I) and (II) were used in the ATRP reaction of methyl met…
The transparent film calcium zinc oxide with indium doping was prepared by spray pyrolysis with calcium nitrate, zinc acetate and indium nitrate precursors. With the increasing of calcium nitrate concentration, the blue shift of cutoff wavelength in the film transmission spectra can be observed. The optical bandgap fo…
We report the first observation of low-temperature luminescence of CoO crystals under synchrotron irradiation. At 8 K, the photoluminescence of CoO is characterized by smaller bandwidth and higher intensity relative to the corresponding photoluminescence band of NiO. The photoluminescence excitation spectra of CoO and…
In order to solve the problems of the fracture of the hammer head and the poor wear resistant of hammer handle in working conditions, the coated liquid–liquid trimetallic composite casting hammer was proposed. The core handler needed to be coated by high impact toughness and high wear resistant liquid high carbon high…
A new transition metal complex of the mono-protonated ligand (dimethylphosphoryl)methanamine (dpmaH+) was obtained by equimolar reaction of copper(II) chloride dihydrate and dpma in concentrated hydrochloric acid. The asymmetric unit of the title structure, [CuCl2(C3H11NOP)4][CuCl4]2, consists of one half of a fourfol…
Due to extreme conditions prevailing in the present fusion reactor chambers and for the future fusion reactor chambers the use of modern materials with special properties characterized by resistance to high temperatures, thermal shocks, unique resistance to erosion, high thermal conductivity and lack of interaction wi…
Plastic deformation in face-centred cubic (or ‘FCC’) metals involves multi-scale phenomena which are initiated at atomic length and time scales (on order of 1.0e-15seconds). Understanding the fundamental thresholds for plasticity at atomic and nano/meso scales requires rigorous testing, which cannot be feasibly achiev…