Materials Literature
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Abstract In this paper, the effect of water hardness, expressed in CaCO3 equivalent, on the dyeing of silk with acid dye under acid, alkaline and isoelectric point dyeing conditions was studied by the zeta potential method. Under acid conditions and in the presence of the calcium ion, the positive zeta potential of si…
Radiation detectors were fabricated with layered structure diamonds comprising several micrometers of a boron-doped single crystal diamond and 20 μm of insulating single crystal diamond layers grown on a HP/HT-type Ib diamond single crystal substrate. To improve the yield rate of CVD diamond radiation detectors this a…
The particular features of the propagation of light in uniaxial chiral liquid crystals with a large pitch of the spiral are considered. There exist forbidden zones in these systems for fairly large angles of incidence of an extraordinary ray. On the one hand, this results in an efficient reflection of the wave from th…
We have performed first-principles calculations to study the interfacial exchange coupling in a SmCo5/Co multilayer model system. The hard phase hcp SmCo5 and the soft phase hcp Co (or Co(1-x)Fe(x)) stacking along (1010) direction are structurally well matched. The atomic structure, including the alignment and the sep…
In order to improve the sound damping effect of a flexible polyurethane foam with an open-cell structure, various kinds of plate-like fillers, such as bentonite, organophilic clay, sodium montmorillonite intercalated with poly(ethylene glycol), were incorporated to create nanocomposites. The plate-like fillers effecti…
Graphene is the first example of truly two-dimensional crystals - it's just one layer of carbon atoms. It turns out that graphene is a gapless semiconductor with unique electronic properties resulting from the fact that charge carriers in graphene obey linear dispersion relation, thus mimicking massless relativistic p…
The effect of the morphology and size of iron carbide in a high-carbon steel on the fatigue strength and critical crack opening is considered. The increase in the fatigue strength induced by a decrease in the pearlite size in medium-and high-carbon steels is caused by the fact that the time of formation of nonuniformi…
A test procedure is proposed for the measurement of the partial discharge inception voltage (PDIV) in dielectric liquids. The antecedent IEC point-to-sphere test cell arrangement is replaced with that of a point-to-plane. A dual ultrawide-narrow bandwidth PD detection system is employed, which permits to distinguish t…
Abstract Dynamic impact-wear and coating fatigue at cyclic loading conditions demonstrates a very demanding failure mode, which occurs in a number of mechanical applications and it becomes very critical when the application concerns aggressive working environments. The coating impact testing is a novel experimental te…
The effects of fillers, including ammonium polyphosphate (APP), aluminium trihydrate (ATH) and talc, and the effect of polyethylene vinyl acetate (EVA) as an interfacial agent, were investigated on the flame retardant properties of intumescent polypropylene (PP), by using mechanical testing, to measure the tensile and…
The crystal structure of nalivkinite, ideally Li 2 Na Fe 2+ 7 Ti 2 (Si 8 O 24 ) O 2 (OH) 4 F, a new lithium member of the astrophyllite group, from the moraine of the Dara-i-Pioz glacier, the Alai mountain ridge, Tien-Shan Mountains, northern Tajikistan, triclinic, a 5.3745(6), b 11.9299(15), c 11.6509(14) A, α 113.32…
After being forgotten for a number of years, Ti has recently re-gained attention for use in Cu barrier applications. For advanced logic products utilizing porous ultra low-k (ULK) dielectric, the main motivation of using a Ti-based barrier is that compared with a Ta-based barrier, the Ti-based barrier is more compatib…
Abstract Poly(3‐hydroxybutyrate)/Cloisite30B (PHB/30B) nanocomposites were prepared by solution‐intercalation method. The influence of 30B content on the thermal stability of PHB was investigated. With the addition of 3 wt. % of 30B the highest thermal stability of PHB was achieved. The kinetic analysis of the non‐iso…
Magnetic susceptibility of the Bi2BaCu x Nb2−x O9−δ solid solutions (0.01 < x < 0.20) with the layered perovskite-like structure was studied. In dilute solid solutions, copper atoms are in the form of Cu(II) monomers. As the concentration increases, the fraction of monomers decreases and the fraction of exchange-bonde…
Abstract Low amount of manganese meso ‐tetraphenyl porphyrin [Mn(TPP)] was used for highly efficient selective oxidation of sulfide to sulfone by hydrogen peroxide at room temperature. Sulfones were produced directly with yields generally around 90% while the catalyst concentration was only 4×10 −5 mol·L −1 . In a lar…
During the investigation of the flashover of FRP surfaces a flashover mechanism has been identified that can occur at moderate values of relative humidity, with very low values of surface leakage current under direct voltages of negative polarity at gradients as low as 111 kVdc/m. A method has been developed to reliab…
This work studies the structure and main properties of nanocomposites based on polyethylene (PE) and modified montmorillonite (MMT) and prepared by intercalation polymerization. This method provides virtually complete exfoliation of precursor MMT particles into nanometer-thick single layers dispersed in the nascent PE…
To simultaneously perform magnetization and magnetostriction measurements in high magnetic fields, a miniaturized device was developed that combines an inductive magnetometer with a capacitive dilatometer and, therefore, it is called "dilamagmeter." This combination of magnetic and magnetoelastic investigations is a n…
The catalytic activity of oxide-supported gold nanoparticles depends crucially on their size. The present work describes a dedicated set-up in which particle size is determined by grazing incidence small angle x-ray scattering (GISAXS) and reactivity is analysed via a mass spectrometer. Catalytically active gold nanop…
For amorphous transparent conductive oxide In2O3–ZnO films over a wide range of resistivities ρ, the temperature dependences of ρ and Hall coefficient RH have been measured in the temperature range of 2.0–300 K. The low-resistivity films show a metallic characteristic (dρ/dT&gt;0), although high-resistivity films…