Materials Literature
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The TBC system's response to thermal exposure at high temperature is discussed here. The relevance of the microstructural aspects of each component of the TBC system is emphasized. The top coat is a YSZ ceramic coating consisting of a collection of splats on top of one another. The most important aspect of this layer…
Cerium activated yttrium silicate (Y2SiO5:Ce) phosphors were prepared by two different wet-chemical synthesis routes namely: simultaneous addition of reagents (SimAd) and solution combustion (SC) using yttriumcerium nitrate and urea as starting materials. TEOS or SiO2 fume were used as Si sources. A comparative study…
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We applied density-functional theory (DFT) with the projector-augmented-wave method (PAW) to investigate systematically the energetics of C-N coupling reactions on Pt(111) and Ni(111)surfaces. Our approach includes several steps: the adsorption of reactants and products (CHx, NHy and CHxNHy, x = 0-3, y = 0-2), movemen…
New magnetic air-stable nanogranular Fe thin films of 10 ± 1.2 nm thickness were prepared onto silicon wafers at 150℃ under inert atmosphere by controlled Chemical Vapor Deposition (CVD) of triiron dodecacarbonyl (Fe3(CO)12). These thin films, composed of sintered elemental Fe nanoparticles of 4.1 ± 0.7 nm diameter, a…
Copper-silica composite coatings were prepared by electro-codeposition on stainless steel substrates. The influence of functionalization and surface charge of SiO2 particles on the electrodeposition of Cu-SiO2 nanocomposite coating was studied. SiO2-SH particles were embedded inside the metal matrix whereas particles…
The paper presents the theoretical part of a method for identifying constitutive parameters involved in the modified Oyane ductile fracture criterion at high temperature. Quite a general rigid viscoplastic model is adopted to describe material behavior. The ductile fracture criterion is in general path-dependent and i…
With a phenomenon of strain-induced martensitic transformation, TRIP steel is expected to show excellent impact energy absorption characteristic. It is important for an improvement of a reliability of TRIP steel to evaluate an amount of martensite. In this study, AISI304, which is a kind of TRIP steel, is deformed pla…
Multiple-quantum-wells (MQW) in multijunction solar cells allow the absorption edges of the subcells to be tuned individually to maximize the energy yields. In this paper, we present the properties a quantum well material for InGaP quantum well solar cells and the performances of the dual-junction dual-MQW devices. We…
In order to further improve the anti-aging properties of polypropylene (PP), the polypropylene (PP) was modified via Supercritical carbon dioxide (SC CO2) grafting copolymerization with AN. PP-g-AN characterized by FT-IR. Polypropylene grafted acrylonitrile (PP-g-AN) / polypropylene (PP) / silica (SiO2) were blended.…
Si/Si1−xCx core/shell nanowires (CS NWs) were synthesized. First, a Si NW was grown via a Vapor–Liquid–Solid (VLS) procedure using Au as a catalyst. Next, a Si1−xCx shell was deposited by a chemical vapor deposition (CVD) method after the removal of the Au tip at the top of the Si NW. We investigated the physical, che…
Relation between the microwave effect on ferroelectric triglycine sulfate and the crystal structure dynamics is studied within the concept of ferroactive medium evolution. It is shown that the effect is most distinct in defect-free samples and correlates with the domain structure dynamics. Domain walls are considered…
The energy spectra of carbon nanotubes with chiralities (5, 5) and (10, 0) have been calculated in terms of the Schubin-Wonsowskii-Hubbard model. It has been shown that, in contrast to the generally accepted concept, all the carbon nanotubes, regardless of their chirality, are semiconductors with an energy gap of the…
Due to the fact that it contains several kinds of toxic substances, stainless steel plant dust is regarded as a toxic solid waste. In this paper, XPS technique was employed to determine the elemental depth profiles on the surface of dust, especially Cr, in order to provide useful information on Cr(VI) formation mechan…
BiFeO3 powders were synthesized by sol gel combustion method using microwave as well as conventional mode of heating. Structure formations are confirmed by X-ray diffraction and the data are fitted with Rietveld refinement. Microwave-assisted sample shows good match with Rietveld refinement, however highly mismatch fo…
Photothermal correlation spectroscopy (PhoCS) is a powerful counterpart to fluorescence correlation spectroscopy (FCS). Using PhoCS it is possible to probe the dynamics of non-fluorescent and non-bleaching ultra-stable metal-nanoparticles in solution and biological specimen, where they can be used as tracers and marke…
Complex (multivalent/mixed valent) oxides involving two or more cations (e.g. ABO3, AB2O4 and A2B2O7) exhibit the most fascinating range of physical and chemical properties amongst the family of materials systems. There is growing interest in nanoscale forms of such oxides which emanates from the novel changes in thei…
New hybrid materials based on polyvinyl alcohol (PVA), 3-mercaptopropyltriethoxysilane (MPTEOS) and tetraethoxysilane (TEOS) were prepared, using a sol-gel process. Thermogravimetric analysis (TGA) was performed to determine the thermal stability of the hybrid materials. MPTEOS, as a precursor, ensured the presence of…
This paper is devoted to analysis of the surface properties of polypropylene fibrous materials modified during molding via introduction of polytetrafluoroethylene ultradisperse powder into polypropylene melt. It is shown that the modification changes not only the bulk, but also surface, characteristics of the fibrous…
This article has been retracted.