Materials Literature
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The correlation between magnetoacoustic emission intensity and mechanical Barkhausen effect intensity has been tested in the case of P91 steel having different microstructure states due to either plastic flow at room temperature or speeded-up creep, performed under stress 290 MPa at temperature 773 K. The plastic stra…
Exfoliated Nylon 66/organoclay (PA66/OMT) nanocomposites were synthesized based on adipic acid, hexamethylendiamine, and organoclay (organically modified montmorillonite, OMT) modified by protonated aminocaproic acid via in situ polymerization. X-ray diffraction and transmission electronic microscopy were used to char…
Based on the microwave absorption properties and the micro-current attenuation mechanism for the cage-like ZnO/SiO2 nanocomposite reported in our previous paper, we established a micro-current attenuation model and the associated quantitative formula for the calculation of microwave absorption properties. Very good co…
We study the mobilities of point-like and extended objects (rods) on a spherical membrane to show how these quantities are modified in a striking manner by the curvature and topology of the membrane. We also present theoretical calculations and experimental measurements of the membrane fluid velocity field around a mo…
The microstructure of AA2024 T351 was characterised by light and scanning electron microscopy combined with energy dispersive X-ray spectrometry. Mainly three types of intermetallics (θ phase, S phase and an Al–Fe–Si–Mn–Cu phase) were identified. The anodic oxide formation on AA2024 was studied by electrochemical meas…
We report on calculations of the anisotropic magnetocaloric effect in DyAl2 using a model Hamiltonian including crystalline electrical field effects. The anisotropic effect is produced by the rotation of a constant magnetic field from the easy to a hard magnetic direction in the crystal and is enhanced by the first or…
The preparation of carbon nanowalls (CNWs) by hot-wire chemical vapor deposition (HWCVD) and the effects of substrate heating temperature T h and filament temperature T f in this method have been investigated. The CNWs can be prepared by HWCVD using CH 4 without H 2 dilution. The wall size obtained from the scanning e…
A diopside composition silicate glass containing 8 wt% Fe 2 O 3 was prepared from melt equilibrated at 1500 °C and different redox conditions in the range logf O₂ = -0.7 (air) to logf O₂ = -6. The Fe 2+ /Fe T was measured using Mössbauer spectroscopy. The Mössbauer data were used to calibrate Raman-scattering intensit…
A sterile environment is one of the basic elements of in vitro cell culture. When choosing an appropriate sterilisation method, the possibility that the physical and chemical properties of the sterilised material could be altered by the sterilisation process itself, should be considered. Avoiding any potential problem…
In this study, a forming magnesium alloy circular cup was simulated accounting for heat transfer at elevated temperatures. In order to predict the failure of magnesium alloy sheet during simulation, the forming limit diagram, which is used in sheet metal forming analysis to determine the criterion for failure, was inv…
We have fabricated and tested Schottky-type photovoltaic cells based on chloro(sub-phthalocyaninato)boron(III) complex, SubPcBCl. The vacuum-deposited SubPcBCl layer was sandwiched between standard glass/ITO substrate and evaporated Au , Ag or Al top metallic electrode. Performance of such cells depends on the work fu…
Previous pollution and non-uniform wetting tests for 550 kVac applications have established the improvement in withstand under 60 Hz voltage that can be obtained in the performance of 3.0 m long 32 mm diameter FRP hot sticks when 15 heat-shrunk polymeric sheds are installed. Each shed has an overhang of 30 mm and they…
The numerical model following the equivalent magnetic domain method is proposed to calculate the anisotropy of the magnetic properties of electrical steel. The angle difference between magnetic flux density vector and magnetic field vector, which is observed in the measurement data, is clearly expressed by the propose…
Metamaterials are artificial media with novel electromagnetic properties. We study the metamaterial unit cells at terahertz frequencies, investigate their electric and magnetic responses to the incident wave, and retrieve their effective material parameters. Simulation results reveal the origins of the effective permi…
Thin layers of GaMnAs ferromagnetic semiconductor grown by molecular beam epitaxy on GaAs(001) substrates were studied. To improve their magnetic properties the post-growth annealing procedures were applied, using the surface passivation layers of amorphous arsenic. This post--growth treatment effectively increases th…
Changes in the functional composition of chitosan films in the course of storage under ambient conditions were examined by conductometric titration and IR spectroscopy. The deformation-strength and thermal properties of the films were studied, and their supramolecular structure was analyzed by X-ray diffraction.
Nano-crystalline particles of barium hexaferrite have been prepared by co-precipitation route using solution of iron and barium chlorides with a Fe/Ba molar ratio of 12 by addition of NaOH with OH-/Cl-molar ratio of 2. A mixture of water and diethylene glycol with volume ratio of 1:3 was used as a solvent in the proce…
Abstract Summary: Self‐assembly of a few OPV derivatives having different end functional groups to aggregates, fibrous networks and organogels are discussed. OPV1 and OPV2 functionalized with ester moieties form gels in nonpolar hydrocarbon solvents whereas OPV3 with carboxylic acid groups form gel from THF and dichlo…
CsSmP4O12 crystals have been prepared at 300°C in molten polyphosphoric acids containing Cs, Mg, and Sm cations, and their crystal structure has been determined: sp. gr. I $$ \bar 4 $$ 3d, a = 15.1225(8) Å, Z = 12, CsNdP4O12 structure.
Gold nanoparticles with an average particle size below 3 nm have been synthesized and stabilized with different thiol-derivatized molecules for studying the influence of the capping molecule on the magnetic behavior. Thiolated-alkane chains with different lengths as well as a thiol-containing biomolecule (tiopronin) h…