Materials Literature
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Hierarchical zeolites have drawn great attentions recently because of their combination of better molecule transport merit of the mesoporous structure and the precise molecule sieving capability of zeolite crystals. Their unique advantages re- cently stimulated rapid development and broad applications in biomass conve…
In the present study, based on the literature review, the wear behavior and mechanical properties of hybrid Aluminium Metal Matrix composite is discussed. These Aluminium Metal Matrix composites with multiple reinforcements (hybrid MMCs) are finding increased applications in the transport, aerospace, marine, automobil…
To expose the material removal mechanism in ultrasonic assisted grinding (UAG) of SiC ceramics, the deformation features of SiC ceramics in ultrasonic assisted scratching (UAS) tests were investigated and compared with those in conventional scratching (CS). The results revealed that the scratching force varies periodi…
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This paper describes experimental investigation of inflatable multiple-beam structure configurations based on non-linear moment-curvature relationship to design light-weight structures comprising inflatable multiple-beams. To design a stable inflatable multiple-beam structure, intermittent bracing system is needed to…
In this work, indium tin oxide (ITO) bi-crystal nanowires (BCN), that coexist with the normal single crystal ITO nanowires, grown by the e-beam evaporation method are reported. The structure and the growth mechanism of the nanowire were studied by detailed high resolution transmission electron microscopy observations.…
In order to research the forming process of H-beam, based on the large H-beam production line of HN600x200, the Standard and Explicit solver of ABAQUS are synthetically used to establish finite element model for rolling process and inter-pass thermolysis process. The reciprocation multi-pass rolling process simulation…
A supported copper catalyst was used as a catalyst for the decomposition of organic dyes using a commercial chlorinating agent. The catalytic process achieved complete decomposition in only 2 min. Different catalyst to dye concentration ratios is studied to determine the optimal conditions. The catalyst is fully chara…
In situ metal, acid and metal-acid (bifunctional) catalytic active functions were prepared following partial reduction by hydrogen of MoO3 deposited on TiO2 at temperatures between 623 K and 673 K. The bifunctional structure is obtained following the reduction of MoO3 to MoO2. The metallic properties of MoO2 are attri…
Polycrystalline CuxTiSe2 (x-0.02, 0.04, 0.06, 0.08) samples were prepared using solid-state reaction method. Thermal conductivity in Cu intercalated TiSe2 has been calculated in the temperature range of 300K-600K using formula κ = DCpρ where D is diffusivity, Cp is specific heat and ρ is density of the material. Therm…
Mono-tungsten carbide (WC) and tungsten (W) have been successfully synthesized and classified by controlling organic–inorganic hybrid precursors. Tungstic acid (H2WO4) was dissolved into ammonium water and then citric acid (C6H8O7) as a carbon source was dissolved into the H2WO4 solution. The precursors, which were ob…
In this work, we study the effect of indium weight ratio in solution: R = [In/Sn] on the properties of SnO2:In2O3 thin films prepared by ultrasonic spray method at fixed temperature of 300°C. The used precursors are tin chloride dehydrate and indium trichloride dissolved in methanol. To prepare hybrid SnO2:In2O3 thin…
In the mixed state of layered superconductor, the antiferromagnetic order of magnetic ions can create the spin-flop domains along the phase cores of the Josephson vortices, and this property impact upon the creep rate in the antiferromagnetic superconductor. The activation of the creep at constant temperature can be e…
The gadolinium oxide nanocrystal (Gd2O3-NCs) memory has been demonstrated with large memory window and good reliabilities. It has been proven that the charges are stored in the crystallized Gd2O3-NCs which are surrounded by trapping-free amorphous phase of Gd2O3film. The calculated deep trapping energy level is about…
A sensitive and selective electrochemical method for determining noradrenaline (NA) was developed using an electron transfer mediator, nordihydroguaiaretic acid (NDGA), electrodeposited on multi-walled carbon nanotubes (MWCNT). Nordihydroguaiaretic acid MWCNT modified GCE (NDGA-MWCNT-GCE) proved to have an excellent e…
Time-dependent responses of drain current (Id) in an AlGaN/GaN HEMT under UV (3.3 eV) and red (2.0 eV) light illumination have been studied at 300 K and 250 K. UV illumination enhances Id by about 10 %, indicating that the density of two-dimensional electrons is raised by about 1012 cm−2. When UV light is turned off a…
In this paper, the effect of an annealing treatment on the microstructure, mechanical properties and electrical conductivity of a deformed Cu-12.8 wt%Fe composite prepared by the “casting/cold working” process is investigated. The Fe filaments exhibit the shape characteristic in the as-drawn composite as the annealing…
Porous Si3N4-SiO2-based ceramics with different porosity were prepared via free sintering of Si3N4 on air with an addition of semolina (5, 10 and 20 wt%) as a pore-forming agent. The semolina content in the starting powder controlled the volume fraction of pores in the sintered body. Small pores (5 μm) formed a contin…
In this study, the AlN buffer layer grown onc-plane sapphire (Al2O3) substrates by metal–organic chemical vapor deposition (MOCVD) was controlled by a preflow of the NH3source. With the treatment of NH3preflow, the monolayer of AlN was formed on the surface of a sapphire substrate by the decomposition of the NH3source…
This study investigated the damage caused by sub-millimeter debris impact on the structures of unmanned spacecraft owing to the increase in the amount of sub-millimeter debris in the low earth orbit. Panel structures are mainly made of honeycomb sandwich panels, and the chassis of electronic devices are mounted on the…