Materials Literature
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The climatic aging of aviation polymer composite materials under mechanical loading is studied. A synergetic effect of these factors on the damage of the materials is found.
The as-cast and as-extruded Mg–14 wt%Li–xSr (x=0.14, 0.19, 0.39 wt%) alloys were, respectively, prepared through a simple alloying process and hot extrusion. The effects of Sr addition on microstructure and aging behavior of the Mg–14 wt%Li–xSr alloys were studied. The results indicated that β(Li) and Mg2Sr were the t…
Inhibition effect of Albendazole on the mild steel corrosion in molar hydrochloric acid was investigated using weight loss, electrochemical impedance spectroscopy (EIS) and polarization techniques. The results show that Albendazole is an effective inhibitor for mild steel corrosion in 1 M HCl solutions and inhibition…
In this study the adhesion properties of a geopolymer-based adhesive on metallic substrates are investigated, considering different surface conditions. Mechanical treatments (grit-blasting and sand-blasting) and chemical treatments (nitro-phosphoric acid and silanization) were performed on steel and aluminium plates.…
The present report is concerned with the designing, obtaining and characterization of novel light –sensitive molecules, belonging to second generation meso-tetraarylporphyrin derivatives. A new structure of A3B porphyrin, namely: 5-(4-pyridyl)-10,15,20-tris(4- phenoxyphenyl)-porphyrin was synthesized in fair yield by…
High frequency current transformers (HFCT) are widely used in partial discharge field and laboratory tests. Using these devices as sensors in partial discharge cable tests brings some advantages, namely: high degree of insulation, relatively good sensibility and the possibility of broadband measures. This paper analyz…
The electronic band structure, density of state and elastic properties of lead-free perovskite oxide SnTiO3 (ST) were investigated by employing first principles calculation using the Density Functional Theory (DFT) within local density approximation (LDA). The energy band gap was calculated from the separation between…
Abstract Synthetic mullites (Al 4+2 x Si 2 –2 x O 10 – x ) belong to one of the most important groups of ceramic materials. Their crystal structure consists of chains of edge-sharing AlO 6 octahedra interconnected by tetrahedral double chains of T O 4 ( T = Al, Si) tetrahedra. The occurrence of oxygen vacancies is ass…
In the paper, a series of Na2O-CaO-Al2O3-SiO2 system glasses following similar compositions to the soda-lime-silicate float glasses and possessing more excellent physi-chemical properties were prepared with different Al2O3/SiO2 ratio. The structure of glasses have been studied by IR and density tests. The investigatio…
Ag nanoparticles were grown on the surface of cotton fabric using chitosan as a template for preparing high uniform antibacterial cotton fabric. Chitosan was applied onto cotton fabric by pad-dry-cure method in presence of citric acid as crosslinking agent. Cotton fabric modified with chitosan was characterized by mea…
The reduction of electromigration failure times with scaling presents a critical challenge for continued technology development. Electromigration failure is determined by void morphology and Cu drift velocity. Using observations of changes in these parameters, particularly the increase in drift velocity due to the inc…
The aminolytic depolymerization of PET bottle waste with ethanolamine by conventional heating and microwave irradiation heating method was attempted with heterogeneous, recyclable acid catalysts such as beta zeolite (SiO2/ AlO2= 15 Na-form) and montmorillonite KSF. The pure product bis-(2-hydroxyethyl) terephthalamide…
This paper describes application of carbon nanotube (CNT) gas sensor to detection of SF6decomposition products generated by positive or negative DC corona discharge. The present authors have demonstrated CNT gas sensor-based partial discharge (PD) detection, aiming to develop a new diagnosis method of gas-insulated sw…
The isothermal crystallization behavior of fiber including glass fiber, carbon fiber and basalt fiber reinforced PLA composites was investigated by differential scanning calorimetry (DSC).The morphology of isothermally crystallized fiber/PLA composites was observed by polarized optical microscope (POM) equipped with a…
Abstract Garnierites represent significant Ni ore minerals in the many Ni-laterite deposits worldwide. The occurrence of a variety of garnierite minerals with variable Ni content poses questions about the conditions of their formation. From an aqueous-solution equilibrium thermodynamic point of view, the present study…
A 64 kbit (kb) one-transistor-type ferroelectric memory array was fabricated and characterized. Pt/SrBi 2 Ta 2 O 9 /Hf–Al–O/Si ferroelectric-gate field-effect transistors (FeFETs) were used as the memory cells. The gate length and width were 5 and 5 µm, respectively. The array design was based on NAND flash memory org…
The thermal- and photo-induced transformations of luminescence centers in anion-defective crystals of α-Al2O3 have been investigated. It has been found that the exposure of crystals to ultraviolet light at temperatures in the range 50–900°C leads to substantial changes in their thermoluminescence and radioluminescence…
In dilute magnetic oxide hexagonal Ba(Ti0.9Fe0.1)O2.81 bulk ceramic, we report on combined ferromagnetism and improper ferroelectricity as well as cross-controlled magnetoelectric effects at room temperature. The annular-bright-field (ABF) imaging technique in scanning transmission electron microscopy (STEM) demonstra…
Molecular dynamics simulation has been performed to simulate the interaction between PESA and the (001) face of anhydrite crystal CaSO4 at different temperatures with the presence of various number of H2O molecules. The results show that PESA can effectively prevent the growth of CaSO4 scale at 323–343 K. At the same…
Self-assembled peptide nanotubes are unique nanoscale objects that have great potential for a multitude of applications, including biosensors, nanotemplates, tissue engineering, biosurfactants, etc. The discovery of strong piezoactivity and polar properties in aromatic dipeptides [A. Kholkin, N. Amdursky, I. Bdikin, E…