Materials Literature
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The mechanism of dislocation dipole annihilation has been investigated in C and Si using atomistic calculations with the aim of studying their annihilation by-products. It is shown, in C as well as in Si, that dipole annihilation yields debris that can be depicted as a cluster of vacancies, or alternately by two inter…
In this work, a SiO 2 buffer layer was first grown on Si substrate by thermal oxidation, and then ZnO thin films were deposited on SiO 2 buffer layer and Si substrate by electron beam evaporation and sol-gel method. The influence of SiO 2 buffer layer on the crystalline quality and photoluminescence of the films was i…
A helix supported by a double-negative metamaterial in a metal envelope was analyzed in the sheath-helix model to explore its potential as the slow-wave structure of high efficiency backward-wave devices. The transmission line equivalent distributed line parameters of the structure were interpreted for the dispersion…
Ti/Mo and Cr/Mo metallic multilayer films with different periodicities were synthesised on a Ti–6Al–4V alloy surface by ion beam enhanced magnetron sputtering deposition process. The structure, bonding strength, microhardness and ductility of the multilayer films were measured. The effects of Ti/Mo and Cr/Mo metallic…
Fe3O4 nanoparticles doped magnetic-optical PbO-Bi2O3-B2O3 glasses were prepared and studied and the effects of Fe3O4 nanoparticle on the properties of magnetic-optical glass were analyzed. It is found that the doping of Fe3O4 nanoparticles into glasses increased the Verdet constant of magneto optical glass without evi…
The major industrial by-product largely generated in southern China is ceramic polishing powder (PP) produced from ceramic industries. In this paper, gross of silicon and aluminum dissolved from polishing powder and fly ash were studied by alkali dissolve experiments, pozzolanic activity of PP and fly ash were studied…
The magnetic structure of a new Mn 3 Sb compound in the Mn-Sb system being characterized by the ferromagnetic ordering of Mn I and Mn II magnetoactive atoms with magnetic moments differing in magnitude is determined by the neutron diffraction technique. The proposed model of magnetic structure is in agreement with the…
By using Deform-3D software, the necking extrusion forming processes of integer trailer axle with two different heating means which are Uniform Heating (UH) method and Partly Heating (PH) method with temperature gradient are simulated. The influence of deformation parameters such as friction factor, necking coefficien…
SiO 2 photonic crystal were successfully prepared by vertical deposition and then used as a template to fabricate SiO 2 -ZnO composite photonic crystals on ITO substrates by electrodeposition and subsequent calcination. A number of different deposition times were used. The morphologies of the silica opals and SiO 2 -Z…
In order to improve corrosion and wear resistance of magnesium alloy, Al coating was prepared on the AZ31 magnesium alloy by the thermal spraying, then the Al-rich layer was obtained by using a CO2 laser re-melting. The microstructures and phases of the alloying layer were analyzed by canning electron microscope (SEM)…
The methods of infrared absorption spectroscopy and Raman spectroscopy are used to study nanocrystalline SnO x films (1 ≤ x ≤ 2) prepared by thermal oxidation of metallic tin layers. A monotonic decrease in the transmittance of films in the infrared region has been observed as a result of exposure of the films to ligh…
In order to evaluate the effect of natural fiber lumen size on the transverse thermal conductivity of the unidirectional natural fiber-polymer composite, a two-dimensional unit cell model of natural fiber-polymer composite was studied using finite element method (FEM). In this study, the FE cell model was kept in the…
The fabrication and characterization of a gas sensing Ag-TiO2 Schottky diode are reported. The fabricated Ag-TiO2-Ti structure, formed by sintering silver nanoparticles on the thermally oxidized titanium foil, demonstrated I–V characteristics of a typical Schottky diode at elevated temperatures up to 500 °C. The I–V c…
Hot compression deformation behaviour of 4032 Al alloy was investigated at temperature of 653–783 K and strain rate of 0·001–10 s−1. The true stress–strain curves indicated that the flow stress of 4032 alloy decreased with the increase in temperature and the decrease in strain rate. The microstructural evolution of th…
The two main graphite ageing processes in advanced gas-cooled reactors (AGRs) are fast neutron damage and radiolytic graphite oxidation. These processes change the properties of the graphite core and lead to a reduction in the graphite density, ie a weight loss. Electrical conductivity measurement of the graphite mate…
Abstract Er 3+ ions doped chalcohalide glasses with the composition of 56GeS 2 ‐24Ga 2 S 3 ‐20KCl were fabricated by a melt‐quenching method. Under 800 nm laser excitation, strong green emissions centered at 525 nm and 550 nm and weak red emission centered at 660 nm were observed, which were assigned to 2 H 11/2 → 4 I…
The influence of strain rate on mechanical properties of Ni-Ti SMA wires was investigated by a series of uniaxial loading tests. The influence of strain rate on critical stress was discussed. During the transformation process, the slop of the stress-strain curves was increasing with the increase of strain rate. A new…
As a compromise between economy and good performance, this paper adopts the combined system using cascaded active power filter (APF) and static var compensator(SVC) to compensate reactive power and harmonic currents simultaneously for high-power applications. The SVC is constructed by fixed capacitor (FC) and thyristo…
Al-pillared montmorillonites (Al-MMT) were synthesized from naturally occurring sodium montmorillonite through exchange of interlamellar ions with hydroxyalumina polycations. Furthermore, Powder X-ray diffraction (XRD), Fourier transformation infra-red spectra (FTIR), Thermogravimetric analysis (TG), and differential…
A new hot dip Zn-5%Al-0.3%Mg alloy coating was performed on cold rolled common steel. The hot-dip process was executed by self-made hot dip galvanising simulator (China patent, No.201010160353). The corrosion resistance of alloy-coated steels was detected by neutral salt spray test . SEM and EDS test results demonstra…