Materials Literature
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Abstract The aim of this article is to upgrade the performance of polypropylene/ethylene propylene rubber (PP/EPR) blends by addition of hydrophobic nanosilica (SiR805) and using “high shear processing technology”. The morphological developments, mechanical and rheological properties of these composites were investiga…
Novel mixed salts of the paratungstate anion Na 2 (NH 4 ) 8 [H 2 W 12 O 42 ]·12H 2 O ( 1 ) and Na 7.5 K 2.5 [H 2 W 12 O 42 ]··22.2H 2 O ( 2 ) are obtained by slow concentration of tungstate solutions and characterized by single crystal X-ray diffraction.
The corrosion of copper-nickel alloy in hydrochloric acid has been investigated at different temperatures, benzotrizole concentrations and corrosive solution velocities. Weight loss technique has been used to evaluate the corrosion rate data. Results obtained have proved that benzotrizole has a dual effect by reducing…
Abstract Melt spinning of the fibers by supersonic air jet in the Laval nozzle is a novel, efficient and energy saving method of formation of super-thin fibers. In the process, polymer melt is extruded from a row of orifices and fast drawn by the pneumatic forces. In the modelling, air velocity, temperature and pressu…
Oxide coatings modified with cobalt and copper oxides are obtained on titanium and aluminum by means of combining plasma electrolytic oxidation (PEO) in silicate and zirconate electrolytes and impregnation in nitrate solutions followed by annealing. The effect of PEO coatings that were preliminarily formed on aluminum…
In this paper, AlON powders were prepared by carbothermal reduction and nitridation method. By adding a mixture of Y2O3, La2O3 and MgO as sintering agent, transparent AlON ceramics with high strength were fabricated by pressureless sintering at 1950°C for 8h under nitrogen atmosphere. The obtained ceramic had a relati…
In this paper, it was consider the study of the use of sugarcane bagasse and wood particles, residues from the agricultural and the furniture industry, in order to add value to such materials. To add value to these materials it will be utilized in the manufacturing of hybrid panels consisting of wood particles and sug…
By imaging the spatial intensity distribution of the electrons from a Stoffel-Johnson (SJ) type low energy electron source for inverse photoemission spectroscopy (IPES), we find that the focus is distorted when the beam current exceeds the limiting value due to space charge effect. The space charge effect and the cont…
Abstract The results of some mechanical properties of four Mg-5Al-xRE-0.4Mn (x = 1 - 5) alloys are presented. The microstructure of experimental alloys consisted of an α-Mg phase and an α+γ semi-divorced eutectic, Al 11 RE 3 phase and an Al 10 RE 2 Mn 7 intermetallic compound. For gravity casting in metal mould alloys…
The results of experiments on the production of zirconia (ZrO 2 )-based thermal barriert coatings on copper substrates under plasma action in electrolytes on preliminary applied zirconium layers are represented. Structural-morphological investigations by scanning electron microscopy, X-ray analysis, and nuclear backsc…
We propose a model describing the kinetics of accumulation of defects under cyclic loading in metals. Analysis of experimental data on the initial defect distribution and of the role of the free surface of the sample in straining makes it possible to explain the features of generation of fatigue cracks in the bulk, wh…
The single-crystal structures of the oxygen-ion-conducting fluorite-type compounds Nd 5 Mo 2.90 V 0.10 O 15.3 and Nd 5 Mo 2.76 V 0.24 O 15.5 were determined by X-ray diffraction. It was found that the displacements of atoms in the structure are retained after the doping of these compounds with vanadium. The dopant ato…
We have examined the effect of high temperature on single-wall carbon nanotubes under air and nitrogen ambient by Raman spectroscopy. We observe the temperature dependence of the radial breathing mode and the G-band modes. The thermal expansion coefficient (β) of the bundled nanotubes is obtained experimentally using…
The selective etching of poly(methyl methacrylate) (PMMA) in a block copolymer was studied with a focus on the material structures of polystyrene (PS) and PMMA. Based on our predictions, we investigated the effect of ion bombardment and designed a carbon-containing gas plasma to improve selectivity. The etching charac…
Crystallographic parameters of TlInS x Se2 − x solid solutions have been measured by X-ray diffraction. Dependences of the unit-cell parameters on the composition are determined. It is established that the values of parameters a, b, and c and the angle β decrease with an increase in x. It is shown that the TlInS x Se2…
A one-step process in an internal mixer was used to prepare Poly(butylene succinate) (PBS)/high-loading modified tapioca starch (30-40 wt%) blends with low glycerol content (10-20 wt% of starch) as a plasticizer. To promote a good compatibility, two reactive agents, maleic anhydride (MA)/peroxide and methylene dipheny…
We report our observations on the higher carrier mobility and higher conductivity of sulfur-doped n-type diamond thin films synthesized by the hot filament chemical vapor deposition (HFCVD). The structural and electrical characterizations of the films are measured by X-ray diffraction (XRD), Raman spectroscopy, scanni…
In the present research the development of liposomes by studying various processes as well as formulation related factors such as effect of cholesterol, effect of alkyl chain length of lipids which may affect the size, shape and encapsulation efficiency of liposomes was reported. Cholesterol and phospholipids were stu…
The possibility of a kind of industrial‐grade X7R type multilayer ceramic capacitor used as an actuator is studied. By applying a DC bias voltage, the ceramic capacitors exhibit a large converse piezoelectric effect which can be used for actuating applications. The experiments show that the capacitor's thickness chang…
The effect of thin films of silicon nanoparticles (nc-Si), deposited onto the front surface of single-crystal silicon solar cells, on their conversion efficiency is studied. The thin films are grown using non-luminescent silicon nanoparticles with an average diameter of 12 nm with SiO x (0 ≤ x ≤ 2) shells and silicon…