Materials Literature
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The compaction and sintering conditions required for avoidance of swelling and development of very coarse pores during liquid phase sintering of mixed elemental titanium powder metallurgy alloys are described with reference to the titanium–nickel binary system. Swelling is minimised by using low compaction pressure or…
In this work, the dependence of microstructure of in situ titanium aluminide and silicide composites on chemical composition and conditions of reactive sintering was studied. It was found that the rate of reactive sintering process increases with growing silicon content. In addition, heating rate strongly affects the…
Thermal properties of silver nanowire-silicone (AgNW-silicone) composites at different weight percentage of AgNW in the polymer were studied. The thermal conductivity of these composites was measured using the heat stack method according to D5470 standard. The silver nanowires were synthesized using a polyol process.…
The retention of xylene, cresol, methylanisole, and lutidine isomers was studied by gas chromatography using the stationary phases based on mesomorphic 4-butyloxy-4′-formylazobenzene and 4-(3-hydroxypropyloxy)-4′-formylazobenzene. A thermodynamic interpretation of the structural selectivity of the nematic phase of the…
The stoichiometric β-FeSe superconductor was prepared for the first time by mechanical alloying (MA) from elemental powders of iron and selenium (1 : 1) and subsequent annealing process. The formation of the stoichiometric β-FeSe is attributed to the MA resulting nanometric precursor containing high reaction activity…
This work describes the synthesis and quadratic nonlinear optical properties of hybrid nanoparticles. These nanoparticles are based on the insertion of the push−pull 4-[2-(4-dimethylaminophenyl)azo]-1-methylpyridinium chromophore in the manganese hexathiohypodiphosphate MnPS 3 inorganic matrix. The included chromophor…
Some films obtained from poly(ε-caprolactam) (polyamide 6) and its copolymers with laurolactam (copolyamides 6/12) were submitted to thermal treatment. The most versatile method for characterization of polyamide and its copolymers, i.e., FT-IR spectroscopy, was chosen as a tool in order to determine the possible chang…
In order to provide the uniformity of measurements at the nanoscale, seven national standards have been developed in the Russian Federation. Of these seven standards, three standards specify the procedures of fabrication and certification of linear measures with the linewidth lying in the nanometer range. The other fo…
Ozone emission in hydro generators is a sign of surface partial discharge (PD) in the stator windings. Surface PD activity can take different forms: slot PD, corona at the junction of the slot semiconductive coating with the voltage grading coating outside the slot, PD between adjacent coils in the end-winding, PD bet…
The rheological behavior and tape‐casting performance of ethanol‐based Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PMN–PT) slurries is studied. A nanocrystalline powder obtained by mechanochemical activation was used. Suspensions were prepared up to solid contents of 32 vol%, significantly higher than those usually reported for n…
The 3D location of RFI (Radio Frequency Interference) and PD (Partial Discharge) sources within a 400 kV substation are presented in this paper. The technique involves the employment of four small broadband mobile antennas attached to a fast digitizing scope. The time differences of arrival within a group of four rece…
Vascular diseases are a major threat to human health nowadays. While current treatments can cure some vascular diseases, their beneficial effects are only temporary; vascular regeneration holds the promise of permanent, effective treatments for many vascular diseases. Stem cells and endothelial progenitor cells can di…
We have studied the microscopic structure and thermodynamic properties of isotropic three-dimensional core-softened model fluid by using extensive grand canonical Monte Carlo computer simulations and Ornstein-Zernike integral equations with hypernetted chain and Rogers-Young closures. Applied simulation tools permit t…
Using a transmission electron microscope and a nanomanipulator, we explored the early head-to-head coalescence of two capped carbon nanotubes (CNTs) under induction of electric current. We measured detaching forces for coalesced CNTs, showing discrete identifiable values attributable to van der Waals interaction, sing…
Mesoscopic-particle–based fluid models, such as dissipative particle dynamics, are usually assumed to be coarse-grained representations of an underlying microscopic fluid. A fundamental question is whether there exists a map from microscopic particles in these systems to the corresponding coarse-grained particles, suc…
A tomographic study of electrochemical cells to observe scales formed on inert anodes has been conducted using energy-dispersive synchrotron X-ray diffraction. This study is preparatory to an investigation that will observe this formation in situ during the cells' operation. The purpose of the current work was to dete…
The present paper concerns with the concept of the strain rate intensity factor in rigid plastic solids. The strain rate intensity factor is the coefficient of the principal singular term in the expansion of the equivalent strain rate in a series in the vicinity of maximum friction surfaces. Such singular velocity fie…
Different TiO 2 and SiO 2 nanoparticles have been tested concerning their toxicity on selected mammalian cell lines. Various powders and suspensions, all of which consist of titanium or silicon dioxide nanoparticles have been examined. These particles differ in the crystal structure, the size and the BET-surface area.…
The crystal structure and ferroelectric properties of (1− x )(Bi 0.5 Na 0.5 )TiO 3 – x Ba(Zr 0.05 Ti 0.95 )O 3 (BNBZT x, x ≤12%) lead‐free piezoelectric ceramics were studied. The distance between the centers of cations and anions ( d c–a ) as well as the lattice parameters was carefully investigated by Rietveld refin…
We consider the spectrum of the Fibonacci Hamiltonian for smallvalues of the coupling constant. It is known that this set is aCantor set of zero Lebesgue measure. Here we study the limit, as thevalue of the coupling constant approaches zero, of its thickness andits Hausdorff dimension. We announce the following result…