Materials Literature
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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…
The crystallographic texture and its correlation with anisotropy of mechanical properties of hotpressed Mg-Y-Gd-Zr alloy distinguished among magnesium alloys owing to its high strength at near room and elevated temperatures are investigated. Studies of mechanical properties of the alloy have shown that, in the hot-pre…
The microstructures and properties of high-density materials produced by a pressureless sintering of nanodispersed powders of composition Si3N4-Al2O3-Y2O3(-ZrO2) have been studied. It has been found that these self-reinforced materials of low glass phase content exhibit the bending strength R bm = 720–850 MPa, Vickers…
Synthesis of diamond-like coatings from a high-velocity flow of gas mixtures in flow regimes from free-molecular to continuum with flow velocities from hundreds to thousands meters per second at different specific flow rates and temperatures in the case of activation of gases on hot surfaces is studied experimentally.…
By using industrial aluminium recycling waste, recycled silicate glass from outworn fluorescence lamp recycling plant, calcined kaolinite clay supplemented with alkali activator with different silicate modulus the new type of porous material for biotechnologic processes without the need for additional equipment for pH…
A miniature integrated Split Hopkinson Bar (SHB) apparatus based on an innovative three-loading bar technique and a multi-stage electromagnetic driving technique was developed for both impact compression and tensile tests. The design principles of these techniques and the whole structure of this new device are discuss…
The results obtained in research tests of kinetics of a radiation-induced formation of surface states in a MOS structure in an atmosphere of molecular hydrogen in various field modes are represented. It is found that an important element of the process of accumulation of radiation-induced surface states is the interac…
Abstract High-temperature solid oxide fuel cells (SOFCs) are considered as suitable components of future large-scale clean and efficient power generation systems. However, at its current stage of development some technical barriers exists which limit SOFC’s potential for rapid large-scale deployment. The present artic…
The extract of harmal (HE) in aqueous 1 M HCl was systematically investigated to ascertain its inhibitor y effect on corrosion of C-steel and its mechanism of the inhibition by electrochemical and weight loss methods.The inhibition efficiency of harmal extract (HE) on corrosion of C-steel in 1 M HCl solution ion incre…
Lead-free pseudo-binary compounds (1-x)Ba(Fe1/2Nb1/2)O3–xBaTiO3; (0 ≤ x ≤ 1) have been synthesized at 1200°C using conventional ceramic technique and characterized by X-ray diffraction, scanning electron microscopy, dielectric and vibration sample magnetometer studies. The crystal structure of the compounds is found t…
The projectile may detach from the target during penetration, while the reattachment may or may not occur after the separation. This phenomenon is termed as the wake separation and reattachment. Firstly, a general framework of rigid projectile penetration with both the free-surface and the wake separation and reattach…
Several novel monometallic platinum catalysts supported on metal oxides (Al 2 O 3 , Y 2 O 3 , γ-Al 2 O 3 , Lu 2 O 3 , ZrO 2 -Y 2 O 3 TiO 2 , SiO 2 , γ-AlO(OH)) and activated carbon (C) were synthesized by extractive-pyrolytic method and tested in glycerol oxidation processes without base addition to obtain glyceraldeh…
Using the Bridgman-Stockbarger technique, we have grown a series of cubic crystals Na0.4Y0.6F2.2:Pr3+ (NYF:Pr3+) with a content of praseodymium in the range of 0.04–9 at %. We have determined the composition of crystals, evaluated their optical quality, and found the incorporation coefficient of Pr3+ ions into the Na0…
The effect of dispersity and zeta-potential of the nanoscale materials (ZrO2 and SiO2) used as an electrolyte component for plasma electrolytic oxidation on the composition and properties of the coatings was investigated. In was established the improvement of the protective properties for coatings with the incorporate…
It is found that diffraction patterns of complexes I–V of the composition [Ln(Phen)(C 4 H 8 NCS 2 ) 3 ] (Ln = Sm, Eu, Tb, Dy, and Tm respectively) are similar. Single crystals of [Dy(Phen)(C 4 H 8 NCS 2 ) 3 ]·3CH 2 Cl 2 ( VI ) obtained are. According to the X-ray crystallographic data, in the structure of VI the unit…
Abstract As an example of a very low friction system, Monte Carlo Brownian dynamics simulations have been used to calculate equilibrium structures of a polyelectrolyte brush grafted onto planes. The polymers were calculated in a semi-flexible coarse-grain model that is appropriate to treat the charge density of the po…
The phase composition of the Al–Ni–Mn–Fe–Si–Zr system is analysed as applied to heat resistant nikalines (aluminum alloys of a new generation based on Ni containing eutectic), which are strengthened by the Al3Zr (L12) nanoparticles. It is shown that the presence of iron and silicon considerably complicates the phase a…
Hydrogenated SnO2 nanoparticles (H:SNPs) were prepared on fluorinated tin oxide covered glass using reduction and hydrogenation technologies with TiO2 sol. By adjusting the hydrogenated temperature over the range of 400–550 °C, the H:SNPs were uniformly embedded in the TiO2 film, exhibiting the ability to precisely co…
Carbon fiber composites are self-healed by advance embedding of repairing agents in the composites. However, the repairing agent will influence the mechanical properties of the carbon fiber composites. In this study, poly(ethylene-co-methacrylic acid) (EMAA) filaments were stitched into carbon fiber-epoxy laminates to…