Materials Literature
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The results of a complex investigation into dark-current relaxation in the long-time region of an MIM structure based on an As-Se thin-film chalcogenide system are presented. The values of parameters describing the electronic processes ocurring in the contact layers of the investigated compounds are estimated. The coi…
In this paper, carbon nanotube models for high-frequency interconnect applications are studied applying electromagnetic and circuit approaches. A first validation of both models gives a better understanding of carbon nanotubes behaviors in RF. The complex surface impedance used in this paper is derived from Hanson's c…
We report multifunctional properties of the charge disproportionate correlated electronic system La0.5Ba0.5FeO3 synthesized by conventional solid state reaction route. The bulk sample undergoes semiconductor–metal like transition at TSM = 102 K showing appreciable magnetoresistance (∼20%) around TSM even at a low fiel…
Slag corrosion resistance behavior of MgO-ZrO 2 refractory was investigated in this work. The results indicated that in the non-oriented electric steel slag system with a high ratio of calcia to silica, the slag resistance behavior of MgO-ZrO 2 composite could be described as follows: the ZrO 2 reacts with CaO forming…
The electronic structure and some features of octavinylsilsesquioxane interaction with sulfene chloride chromium acetylacetonate complex were studied by means of XPS and DFT. According to XPS, spectrum lines have close positions for all the studied compounds, half-width for dendrons not exceeding 2 eV. For octavinylsi…
Along with increasing W and Mo contents in Cr-W-Mo-V high alloy medium-upper carbon steels, the maximal hardness of secondary hardening during tempering is increasing gradually and arrives to 66.8HRC, and the congruent quenching temperature and the tempering temperature corresponding to maximal hardness are ascending.…
The effect of high-cycle fatigue loading of U10 steel specimens with a fine-lamellar pearlite structure that were a annealed for a short time on the character of variations of the tangential component of the magnetic induction vector of specimens in a residual-magnetization state has been studied. It was found that fa…
Abstract The first part of the history of composites in aerospace emphasised materials with high specific strength and stiffness. This was followed by a quest for reliable manufacturing techniques that guaranteed sufficiently high fibre volume fractions in complex structural parts with reasonable cost. Further improve…
Continuous repeated gate sweeping incorporated with substrate etching step is utilized to decrease the OFF state current in single-walled carbon nanotube field effect transistors with bundled carbon nanotubes. In particular, the effects of continuous repeated gate sweeping on transfer characteristic of transistors are…
Railway networks are subjected to more and more severe loading conditions requiring the use of steels with a high resistance to wear and good fatigue behaviour. The surveys carried out on out of use equipment, such as rails or switches, show that these equipments fail by wear after quite a long period of use, but they…
Abstract The direct polycondensation of isophthalic acid with a mixture of 1,3‐phenylenediamine ( m ‐PDA) and 3,4′‐diaminodiphenyl ether (3,4′‐ODA) could be successfully performed in the bulk to afford the expected co‐aramids for the first time. The co‐aramids with low molecular weights and 3,4′‐ODA contents higher th…
The Cu-Fe-P alloy C194 for lead frames was prepared using thermomechanical treatments (TMT)．The effects of deformation ratio of cold rolling and aging temperature on the conductivity and micro hardness of C194 alloy during TMT were studied by a low DC resistance tester and a Vickers hardness tester. The results showed…
It is shown that the supercritical fluid (SCF) impregnation of polymers containing phenylphenol and halide polar groups (polycarbonate, fluoroplastic, poly(vinyl chloride)) with spiro compounds leads to conformational rearrangements resulting in stabilization of merocyanine forms of the photochromes. The effect of the…
A series of mesoporous mixed metal oxide were prepared by using a cation-anion double hydrolysis method, which was demonstrated to be a generalized approach for the synthesis of meso-porous mixed metal oxides. The mesoporous mixed oxide were characterized by N adsorption, X-ray diffraction, transmission electronic mic…
Mesoporous silicas containing the functional group ≡Si(CH2)2P(O)(OC2H5)2 in the surface layer have been obtained using the template method (template—P123). Their treatment by a concentrated hydrochloric acid results in the formation of functional groups of the composition ≡Si(CH2)2P(O)(OH)2 that is in agreement with t…
We have studied on theoretical electron energy deposition in thin resist layer on Si substrate for electron beam lithography. We made Monte Carlo simulation to calculate the energy distribution and to consider formation of nanometer sized pattern regarding electron energy, resist thickness and resist type. The energy…
Microstructure and texture development of an AlSiMg alloy during equal channel angular pressing (ECAP) was investigated and correlated with the mechanical properties. The micro-structure was effectively refined by ECAP, and the original fibre texture of the extruded aluminium alloy was disintegrated and a new texture…
The manufacturing cost of asphalt flame retardant is very expensive since it mostly comprises halogen, stibonium and boron composite system. As a result, its use is restricted. In this paper, three kinds of cheap phosphorus, nitrogen flame retardants and two kinds of inorganic flame retardants for modifying asphalt. B…
TiNi-based shape memory alloys possess good-damping capacity at the martensite state because of abundant easily movable twin boundaries. However, most TiNi-based shape memory alloys only show an extremely low damping capacity at temperature above room temperature because their martensitic transformation temperature is…
We present the second order nonlinear optical properties of the Disperse Red 1 (DR1)-doped poly (cyano phenylene sulfide) (PCPS) - novel ferroelectric amorphous polymers. The PCPS possess self-organized long-range polarizations when they are annealed at temperatures higher than their glass transition point. From the u…