Materials Literature
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Subsea cable applications for the offshore power distribution systems create technical challenges in the system design, operation, and maintenance. Harmonic parallel resonance introduced by subsea cables is one of the main concerns. In this paper, parallel resonance is investigated for an offshore distribution system…
Abstract The objective of this paper is to present a kinetic model for simulating the nitroxide controlled radical polymerization initiated with mono‐ and bifunctional alkoxyamines. The model approach was validated by experimental data. The simulated product composition mainly depends on the equilibrium constants K (=…
The modular synthesis and self-assembly behavior of a set of peptide-polymer hybrid amphiphiles is described. Gly-Gly-Arg derivatives were conjugated to one of the ends of hetero-telechelic polystyrene (PS) via either the Cu-catalyzed azide-alkyne 1,3-dipolar cycloaddition (CuAAC) reaction or conventional peptide coup…
The enthalpies of formation of δ-hexanolactone and δ-nonanolactone were determined by combustion calorimetry. Conformational analysis and quantum-chemical calculations of equilibrium structures, fundamental vibrations, moments of inertia, and total energies were performed for δ-pentanolactone ( I) , δ-hexanolactone (…
Important energy and time savings can be achieved with the thermal treatment of materials by replacing conventional heating methods with microwave heating. The nanocrystallization of Co-Fe-W-B amorphous alloy powders under microwave irradiation was followed for the first time by in situ time-resolved synchrotron radia…
The present paper deals with full-field strain measurement on open-hole tensile specimens submitted to high strain rate through a Hopkinson bar device. After having briefly explained the methodology (using an Ultra-High speed camera), the strain results obtained on a first test are shown leading to a discussion on the…
An icosahedral quasicrystal (i-phase) and its 1/1 crystal approximant (1/1-phase) have been found to form in Al-Pd-Sc system. The formation areas of the i-phase and the 1/1-phase are limited to very small areas around the compositions of Al54Pd30Sc16 and Al56Pd29Sc15, respectively. The valence electrons per atom ratio…
Influences of high-oxygen-pressure (350 MPa) annealing on the properties of leakage current, polarization, and strain were investigated for single crystals of (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-BaTiO3 with P4mm tetragonal structure The oxygen annealing led to a marked increase in leakage current, showing that the oxidiz…
In this paper, for the first time, an experimental investigation is presented of five successive loadings of reactant alkaline solution of sodium borohydride (NaBH4) for hydrogen generation, using an improved nickel-based powder catalyst, under uncontrolled ambient conditions. The experiments were performed in two bat…
Blue-violet luminescence was observed in a mineral oil, which appeared under hydrodynamic cavitation conditions in a channel orifice 1 mm in diameter in a transparent throttling device at inlet pressures higher than 2 MPa. The appearance of electric pulses when a dielectric liquid flew through a thin channel orifice w…
An electroactive nanostructured silver niobium oxyfluoride (SNOF) was successfully synthesized through the mechanochemical reaction of and . Throughout a wide composition range of , the AgF-based SNOF was shown to be a cubic perovskite structure. For -based SNOF, a cubic perovskite developed at , a structural phase tr…
Physical, chemical and microbiological characterization of three tropical acidic soils of Rwanda under natural fallows and productivity constraints. Three acidic soils of highland (HL), middle land (ML) and lowland (LL) from Rwanda were sampled respectively in the experimental stations of Gakuta, Tonga and Cyabayaga f…
Effect of alkali-treatment on the mechanical properties of a ramie plied yarn reinforced green composite was investigated, using NaOH solutions with various concentrations. The composites reinforced with NaOH-treated yarns decrease in strength and Young's modulus if the concentration of the solution is equal to 12wt%…
Several closed-shell systems [X(AuPH3)2+]2 (X = F, Cl, Br, I) have been theoretically investigated by using density functional theory (DFT) and second order Møller-Plesset (MP2) methods in order to study the intermolecular aurophilic interaction. We studied the geometry of the structures, natural bond orbital (NBO) po…
The effect of reinforcement in the cross-linked poly(propylene fumarate-co-caprolactone diol) thermoset composites based on Kevlar fibres and hydroxyapatite was studied. Cross-linked poly(propylene fumarate-co-caprolactone diol) was also studied without any reinforcement for comparison. The reinforcing fibre acts as a…
A family of calcite nanocrystal superstructures with unusual morphology were obtained from crystallization of calcite by the CO2 gas diffusion technique in the presence of a bioinspired double hydrophilic block copolymer, polyethyleneglycol-block-poly (L-aspartic acid). From the typical calcite rhombohedra as a starti…
The direct filling of flexible single-walled carbon nanotubes by model molten salts are described. The simulations advance on previous work, in which the carbon nanotubes were treated as fixed atomistic entities, by considering the carbon nanotubes as fully-flexible. The molten salts are described using two potential…
A soft chemistry route involving SDS and zinc salt aqueous solutions allowed growing films of hybrid ZnO-based nanostructured plates from a substrate with ZnO crystal seeds. Plates exhibit a long-range ordered lamellar nanostructure formed of thin ZnO layers and SDS bilayers and remarkably, the lamellar phase presents…
During the 13th periodic inspection, which started in February 2008, KEPCO’s Ohi unit 3 (1,180MWe PWR) implemented voluntary ECT in addition to the visual inspection of the RV hot and cold leg nozzle welds to confirm the integrity of the concerned section. As a result of inspection, in March 2008, a flaw extending in…
Poly(ester amide)s (PEAs) were prepared from diols, amino alcohols and diamines with an in-built amide group via polycondensation with 1,4-butanediol and dimethyl adipate. The tailor-made monomers were synthesized by ring opening of ε-caprolactone and ε-caprolactam using 1,4-diaminobutane, 4-aminobutanol and 2-aminoet…