Materials Literature
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An ultrafine grained Nb microalloyed steel was produced by cold rolling of martensite followed by annealing heat treatments at different times to study its effect on the microstructure and mechanical behaviour of the ultrafine grained steel. High strength was achieved by this thermomechanical processing due to the for…
Temperature dependences of resistivity, thermoelectric coefficient, and structural characteristics of the n-TiNiSn intermetallic semiconductor heavily doped with Co impurity (the Co concentration N Co ≈ 9.5 × 1019−1.9 × 1021 cm−3) have been studied in the temperature range 80–380 K; the distribution of the electron de…
The kinetics of selective CO oxidation (or individual CO or H2 oxidation) over ruthenium catalysts are considerably as affected by the heat released by the reaction and specifics of the interaction of ruthenium with feed oxygen. In a reactor with reduced heat removal (a quartz reactor) under loads of ∼701 g Cat −1 h−1…
In this paper, we report on spectroscopic studies of Cr3+/Ni2+ codoped transparent glass ceramics containing β-Ga2O3 nanocrystals. Energy transfer between Cr3+ and Ni2+ in the Cr3+/Ni2+ codoped glass ceramics has been investigated by steady state emission spectra, time-resolved emission spectra, and excitation spectra…
Calcium carbonate (CaCO(3)) has been widely used for biomedical and pharmaceutical applications. Mesoporous CaCO(3) microparticles produced by precipitation were evaluated for macromolecular encapsulation using model macromolecules like Fluorescein isothiocyanate-dextran (FITC-dextran) and Enzymes [Horse radish Peroxi…
The anodic formation of nano-size anodic films of Ag(I) oxide on polycrystalline silver and Ag-Au alloys, as well as on low-index monocrystalline silver faces in 0.1 M KOH, is studied. Based on the data of photocurrent measurements, the n-kind of the oxide film conductivity is determined. Replacing the polycrystalline…
The kinetics of solid-phase synthesis of complex rare-earth (RE) oxides from an amorphous precursor state during continuous heating is studied by X-ray diffraction. Using the synthesis of RE borates (ReBO3) as an example, it is shown that a continuous heating of such precursors stimulates the formation of new phases w…
The influence of CaS and MnS impurities as well as the excessive phases inclusions on the pitting corrosion of steels is investigated.
Remote areas power supplies (RAPS), with their crucial \nrequirement for good inverter input voltage regulation, differ markedly from other applications such as uninterruptible power supplies (UPS), electric vehicles (EVs) and hybrid electric vehicles (HEVs). Also, the overall cost of remote area power supplies is…
The filtration behaviour of two types of spun-laid nonwoven fabrics, namely thermobonded and needle-punched, with wide range of physical parameters has been studied. A computerized air filtration apparatus has been designed and developed for measuring the air filtration characteristics of different types of filter fab…
Articular cartilage is an important load bearing surface in joints. Prone to damage and with limited self-repair ability, it is of interest to tissue engineers. Tissue implant design requires full mechanical characterisation of healthy native tissue. A layered organisation of reinforcing collagen fibrils exists in hea…
An experimental investigation of gold coated, multi- walled carbon nanotube (CNT) surfaces was conducted, to determine the limits of these surfaces as electrical contacts. The multi-walled CNT's (MWCNT's) were synthesized on a silicon planar and sputter coated with a gold film. The planar surfaces were mounted on the…
Abstract Metal pellets of silver and copper for surface‐enhanced Raman scattering (SERS) spectroscopy were prepared by compression with different pressures. It was found that the SERS activity of the pellet could be controlled by pressure. Enhanced Raman scattering properties of the metal pellets in the presence of ad…
This paper presents an experimental and theoretical investigation of the microstructure formation and segregation behaviour of a new austenitic steel based on the Fe-Mn-C alloy system. In order to accomplish the simulations, a modification of the model by Cha et al. is introduced. It includes a correction which compen…
A study of the properties of water-soluble tetrasubstituted cationic aluminum phthalocyanine (AlPcN(4)) revealed efficient binding of this photosensitizer to phospholipid membranes as compared with tetrasulfonated aluminum and zinc phthalocyanine complexes. This also manifested itself in enhanced photodynamic activity…
Silver nanoparticles with spheres, rods have been prepared by a pulse sonoelectrochemical technique from an aqueous solution of AgNO 3 in the presence of sodium dodecyl sulfate C 12 H 25 NaO 4 S -(SDS). The as-prepared silver nanoparticles are characterized by electron microscopy (TEM, SEM), powder X-ray diffraction (…
A method for the galvanic deposition of iron-group metals onto porous silicon (por-Si) substrates has been developed. The morphology and phase composition of por-Si nanocomposites containing galvanically deposited particles of Fe, Co, and their mixtures have been studied by scanning electron microscopy (SEM), ultrasof…
The electrochemical behavior of composite materials based on phenyl substituted cobalt porphyrins and Nafion is studied. Several cobalt porphyrins with presumably predictable variation of their hydrophilic/hydrophobic properties due to different donor and acceptor substituents in the para position of phenyl rings are…
The use of unconventional methods for the preparation of Nanosized catalysts for the selective hydrogenation of acetylene and its homologs is considered. Based on published data and experimental data obtained in this work, it is shown that catalysts based on nanoparticles of palladium have a high activity, although th…
La 1-x Sr x MnO 3 (x = 0.1, 0.2, and 0.3) nanoparticles (LSMO NPs) were successfully synthesized by a simple sonochemical-assisted method. The prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The compositions of samples were…