Materials Literature
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A thin-layer heterophase MAI D5 coating intended for the protection of carbon-containing composite materials (C-C-, C-SiC-, SiC-SiC-composite material) and refractory metal-based alloys against high-temperature gas corrosion and erosion is tested. The coating is formed from a specially developed Si-Ti-Mo-B-Y microcomp…
Europium-doped La2O3 nanocrystalline powders with sizes ranging from 4 nm to 300 nm have been obtained by the modified Pechini, hydrothermal with conventional furnace, hydrothermal with microwave furnace, and precipitation with ultrasonic bath methods. X-ray diffraction techniques were used to study the evolution of t…
Four samples of the solid solution (Co1−xFex)2(OH)2(C8H4O4) x = 0.25 (1), x = 0.5 (2), x = 0.75 (3); x = 0.88 (4) (C2/m) were investigated by synchrotron radiation using Multi-wavelength Anomalous Diffraction (MAD) and multipattern refinements in order to locate the two neighbour metallic elements Fe and Co. Although…
1,4 dioxane, a new additive allows the splash blending of ethanol in diesel in a clear solution. The objective of this investigation is to first create a stable ethanol-diesel blended fuel with 10% 1,4 dioxane additive, and then to generate performance, combustion and emissions data for evaluation of different ethanol…
Acetylacetone has been used as a chemical modifier for the synthesis of undoped and Tb(3+)-doped Y(3)Al(5)O(12) powders. A systematic investigation concerning its influence on the structural and morphological properties of amorphous and crystallized samples has been carried out. These properties have been comparativel…
Al-containing helical mesoporous silicas have been synthesized and characterised by different techniques, showing outstanding activities (comparable to those obtained with sulfuric acid) in the oxathioacetalization of cyclohexane.
Synthesis, electrochemical, X-Ray structure, experimental and TD-DFT calculations of photophysical properties have been explored for the [Cu(2)(Cis-TTF-bis-CON-2-Py-N-oxide)(2)] binuclear coordination complex involving Cis-tetrathiafulvalene-bis-amido-2-pyridine-N-oxide as a bi-anionic ligand.
Synchrotron powder X-ray diffraction, ab initio molecular dynamics calculations and solid state (1)H and (2)H NMR are used to refine the structure of crystalline NH(4)BH(4) including H atoms. Rapid reorientations of both ions mean that on average half-hydrogens occupy the corners of a cube around B or N.
The effect of the Mg(OH)2 particle size on the thermal degradation and flammability of a model nanocomposite is presented. In order to investigate the effect of particle size on the flammability and thermal stability of materials intended for cable coatings, the ethylene–vinyl acetate copolymer (EVA) was filled with t…
Abstract Polycrystalline microstructures can be well imaged using maps reconstructed from orientation data collected by electron backscatter diffraction (EBSD) in the scanning electron microscope (SEM). These maps are very helpful for delineating grain boundaries in such microstructures and are thus well suited for gr…
Aluminium-scandium (Al-Sc) alloy is subjected to shear deformation at high strain rates ranging from 3.0×105 s−1 to 6.2×105 s−1 using a compressive-type split-Hopkinson pressure bar (SHPB). The effects of the strain rate on the shear stress, adiabatic shear band characteristics, and fracture features of the Al-Sc allo…
Density functional calculations are carried out to investigate the interaction of water with the low-index stoichiometric surfaces of the TiO2-B polymorph of titanium dioxide. Dissociative adsorption is predicted for the (100) surface, whereas mixed dissociative/molecular adsorption is favored on both the (010) and (1…
The planar extensional flow resistance of a foaming-grade polystyrene, with and without a blowing agent, was characterized using two dies, each one consisting of a high-aspect-ratio straight rectangular channel followed by a hyperbolic convergent rectangular channel. With the hyperbolic geometry, the fluid near the ce…
The crystallization process of Se90−xTe10Pbx (where x=2.5, 5, 7.5 and 15 at%) glassy system was studied by differential thermal analysis (DTA) technique under non-isothermal conditions. The crystallization parameters were calculated using different kinetic models. The validity of the Johnson-Mehl-Avrami (JMA) model to…
A Magnetic Circular Dichroism (MCD) spectroscopic study of the antiferromagnetic ring [Cr₈F₈Piv₁₆] (Piv = pivalate) is reported. From the splitting of the MCD bands, the single ion anisotropy parameters in the cluster spin ground state at different fields were determined to be d(Cr) = -0.33 ± 0.02 cm⁻¹, e(Cr) = 0.11 ±…
Novel -type cyclodextrin (CD) derivatives, , and , bearing 6, 7 and 8 bis(carboxymethyl)amino (iminodiacetic acid) groups, respectively, were prepared, and their complexation with Eu(iii), Tb(iii) and Gd(iii) ions was studied. Luminescence titrations and mass spectrometry showed formation of multimetal complexes ( 2 t…
At present, the only solid material believed to be a viable option for plasma‐facing components (PFCs) in a fusion reactor is tungsten. Operated at the lower temperatures typical of present‐day fusion experiments, tungsten is known to suffer from surface degradation during long‐term exposure to helium‐containing plasm…
International audience
The paper describes the development of a chromate-free self-healing corrosion protection coating for high strength aluminium alloys. The concept for this approach is based on using inhibitor loaded microcapsules incorporated in the paint film. The capsules are produced by means of interfacial polymerisation. The capsu…
The chapter presents the inventory, achievements, and future prospects in the area of natural fibers production, processing and application, with special emphasis on the fibrous plants.Various parts of lignocellulosic plants like seeds, leaf, straw, bast, woody core have potential as the sources of valuable textile fi…