Materials Literature
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"Se aplicó un tratamiento termoácido a una arcilla natural, proveniente de la región central del Perú, con alto contenido de esmectitas. La arcilla activada en solución ácida de HCl 2N a 90 o C fue probada como material adsorbente de colorantes tipo azoico utilizados en la industria textil. Los efectos de la activació…
SWNT were synthesized by arc‐discharge methods. The as produced material was treated by different procedures in order to get purified SWNT. The treatments led to higher conductivity values as measured on bucky papers. The SWNT were incorporated into a polymer matrix of polycarbonate by melt mixing using a small scale…
This work aims at characterizing the phase relations in the CuFe2O4/SiO2 system. Samples were prepared by the sol-gel method. Final heat treatment of the samples was carried out at temperatures in the range of 800–1100 °C. Final products were characterized by HR TEM, X-ray diffraction, magnetic measurements, and Mossb…
To determine the fracture properties of Zr-2.5Nb pressure tubes irradiated until the end of design life, cantilever beam, curved compact toughness, and transverse tensile samples were prepared from a typical pressure tube and irradiated in the high flux reactor OSIRIS at CEA, Saclay, France. Experiments were conducted…
НУ "Львiвська полiтехнiка", НДЦ "
Thermoplastic polyurethane (TPU) was blended with thermoplastic polypropylene (PP) in different weight percentages in a twin-screw extruder and characterized by dynamic mechanical analysis (DMA) and X-ray analysis. Mechanical properties were also measured. Viscoelastic and mechanical properties of pure thermoplastic p…
The topic of this paper is to construct the module of the current transformer (CT) basing the Jiles-Atherton (J-A) hysteresis model in electromagnetic transient program (EMTP) and alternative transient program (ATP) simulation. The J-A hysteresis model constitutes of first-order ordinary differential equations and has…
Liquid crystals (LCs) are important materials for flat panel display and photonic devices. Most LC devices use electrical field-, magnetic field-, or temperature-induced refractive index change to modulate the incident light. Molecular constituents, wavelength, and temperature are the three primary factors determining…
We prepared novel hydrogen-bonded liquid-crystalline polyurethane complexes from 4-dodecyloxybenzoic acid and polyurethane containing pyridyl units in the main chain, based on 2, 6-bis(hydroxymethyl) pyridine. The complexes were investigated by differential scanning calorimetry, polarizing optical microscopy, and X-ra…
The aim of the research was to explore the effect of household fabric softeners on the textile hand rates after repeated washing cycles. The behavior of three pure cotton and one cotton-PES blended textile materials, which were different in type, structure, thickness and finishing, were investigated in the multifold w…
The spallation of oxide scales from the steam side of tubes in power generation boilers can severely limit component life time. The process involves through scale cracking and crack propagation at or parallel to the scale/alloy interface. Many techniques have been developed in the past two decades to assess the interf…
X-ray absorption spectroscopy was used to study the local structure and chemical bonding of elemental phosphorus. Three allotropes of this element exist in the solid state. The most common of these is the amorphous red phosphorus. The other two are crystalline: white phosphorus and black phosphorus. In the gas phase t…
There is pressure on the rubber industry to reduce, or even remove, the zinc oxide used in rubber compounds, because of concerns that zinc chemicals may have adverse effects on the aquatic environment. An EUsupported project, entitled Ecozinc, was set up to determine the scope for reducing, or eliminating, the zinc ch…
The microstructure and crystal structure of oxide films in different depth of oxide thickness, and the morphology of fracture surface of oxide films, which are formed on Zircaloy-4 specimens during the autoulave tests in deionized water at 360 ℃/ 18.6MPa, have been investigated by transmission electron mi- croscopy, s…
A method to optimize the location and the dimensions of the corona ring is presented for EHV transmission line composite insulators. This method is used to handle the open boundary problem of the insulator model by means of the asymptotic boundary conditions. Then, in order to set the optimal goal, the finite element…
Geographic associations of duplex soils, like the Estcourt form, and plinthic soils, like the Avalon and Westleigh forms, such as are found in the Eastern Free State, are recognised worldwide. These soils share redox morphology. In duplex soils, the redox morphology is dominated by a contrast in clay content between t…
The water treeing phenomenon has been recognized as an ultimate difficulty for long-term service life of cross-linked polyethylene (XLPE) insulated power cables. Elucidation of substantial mechanistic pathway of water treeing is quite important to suppress water treeing. Many factors which affect water treeing have be…
In the design and construction of waterfront structures, there is a need for development of a corrosion resistant, lightweight, cost effective and environmentally friendly structural material. Hybrid wood-plastic composite (WPC) - fiber-reinforced polymer (FRP) structural members would be corrosion resistant, and rela…
Corrosion prevention methods of materials are key technologies to increase in power generation efficiency, reduce in environmental pollution and realize maintenance-free in the waste-to-energy plants. Corrosion environment have became severe condition according to social demands such as increase in calolific value of…
Development of micro seismic generator for energy harvesting applications is presented. In order to fabricate MEMS-friendly high-performance electret film, CYTOP is adopted as an electret material and the charge density and the charge stability of CYTOP is experimentally characterized. When corona charging is employed…