Materials Literature
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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…
This paper presents results of oxidation tests and corrosion investigations of titanium alloy Ti13Nb13Zr performed at different conditions. The oxide layers have been formed by electrochemical method in 2M H 3 PO 4 + 0.3% HF solution for 30 min. and 1 h at 20 V constant voltage. The corrosion tests have been made by p…
EXPO2011 is a new package for phasing crystal structures from powder diffraction diagrams. It is able to carry out all the steps necessary for crystal structure solution, from pattern indexation up to Rietveld method for structure refinement: for each step, the basic algorithm is described. Phasing is performed via ab…
PANI-TSA/PA6 core-shell nanofibers were prepared via the electrospinning process with a PA6/formic acid solution and the chemical polymerization of PANI doped with p-toluene sulfonic acid (TSA) on the surface of the PA6 nanofibers. Their structure and morphology were examined by FE-SEM and FTIR and the fabrication mec…
Al-doped ZnO (AZO)/Cu bi-layer films are deposited by dc magnetron sputtering on polycarbonate substrates at room temperature. The structural, electrical and optical properties of the films are investigated at various sputtering powers of the Cu layer. The AZO/Cu bi-layer film deposited at a moderate sputtering power…
Targeted delivery carriers are receiving considerable attention, the development of a more precise targeted delivery carrier is critical for the advancement of cancer chemotherapy. In this study, we evaluated the effects of RGD-conjugated poly (lactic acid-co-lysine)-(Arginine-Glycine-Aspartic) nanoparticles (PLA-PLL-…
Corrosion of metallic surfaces has continued to receive attention in the scientific world and has generated much concern with regard to material loss, especially in technological activities. The scientists in the field of corrosion are relentless in seeking better and more efficient ways of combating the corrosion of…
In this study, we present the manufacturing process of two new composites materials in the form of long fibers of polylactic-acid (PLA) or polypropylene (PP), reinforced by cellulose whiskers micro-fibers loads. In order to evaluate the mechanical properties of these advanced materials, a several uniaxial tensile test…