Materials Literature
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The reaction of equimolar amounts of triphenylamyl- and triphenylpropylphosphonium iodides and triethanolammonium iodide with antimony iodide in dimethyl sulfoxide, dioxane, or acetone gave complexes [Ph3AmP] 2 + [Sb2I8 · 2DMSO]2−, [Ph3PrP] 2 + [Sb2I8 · C4H8O2]2−, and [(HOCH2CH2)3NH] 4 + [Sb4I16]4−, the structure of w…
The du Noüy and oscillating droplet shape methods are employed to study the effects of the ionic strength and pH of a medium, as well as the addition of nonelectrolytes (lower alcohols and acetone), on the adsorption and surface rheological characteristics of aqueous solutions of humic acid salts (sodium humates) at t…
The creep in Ni3Ge alloy single crystals with strain axis orientations of [001], [ $$ \bar 1 $$ 39], [ $$ \bar 2 $$ 34], and [ $$ \bar 1 $$ 22] was investigated. It was found that changes in strain axis orientation that lead to cubic slip increase the creep resistance of Ni3Ge alloy single crystals.
The effects of NaOH concentration, mineral additive and initial temperature on hydrogen generation from aluminum water reaction were investigated using gas chromatography, X-ray diffraction detection and scanning electron microscope on the reaction gas and solid product. The results show that NaOH which provides a bas…
The low production rate of electrospinning process may limit the industrial use of single needle system. To meet high yield requirement and uniform fibers, a bottom-up multiple jets electrospinning nozzle was designed. The influence of electric field interference on jet path, membrane shape and fiber morphology was in…
Mechanical vibration was introduced into the solidification in order to overcome the defects of coarse microstructure and low mechanical properties of the AZ91D magnesium alloy via lost foam casting（LFC）. The microstructure with fine uniform dendrite grains were achieved with mechanical vibration, which was mainly att…
The low Earth orbit (LEO) environment is considered hazardous to spacecraft, resulting in materials degradation. Currently, in order to evaluate the degradation of materials in LEO, a retrieval of space exposed samples is required. In this study, a novel approach is proposed to evaluate degradation of materials in LEO…
The binary salt Cs7[BW12O40][Rh2(CH3COO)4Cl]2 · 8H2O was obtained by heating of K8[HBW11O39] · 13H2O with [Rh2(CH3COO)4(H2O)2] in water followed by crystallization in the presence of CsCl. The crystal structure of the salt was determined by X-ray diffraction. Its ionic structure consists of the Cs+ cations, the Keggin…
Weak polyelectrolyte multilayer thin films deposited by sequential spraying of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) solutions are described. Using the spray layer-by-layer (spray-LBL) method, nanoscale texture structures were fabricated considering several factors such as the concentration…
Effect of vacancy and Stone–Wales defects on the oscillatory behavior of (5,5)/(10,10) carbon nanotube-based oscillator are studied using NVE molecular dynamics simulations. Results show that defects reduce stability of the oscillators. Effect of single vacancy defect on stability is very small, whereas Stone–Wales de…
Integral enthalpies of mixing Δmix H for binary rare-earth metal (REM)-aluminum systems are calculated using the following three semiempirical approaches: an ideal solution model for interaction products, the Miedema model, and a specific calculation algorithm developed by us. Possible qualitative and, for a number of…
This paper discusses a recent proposal for definitions of acoustic dose and acoustic dose-rate. Acoustic dose is defined as the energy deposited by absorption of an acoustic wave per unit mass of the medium supporting the wave. Its time-derivative, acoustic dose-rate, Qm, in W kg−1 is central to the prediction of both…
Stacked-cup carbon nanotubes were formed by either Fischer-Tropsch type or Haber Bosch type reactions in a metal free system. Graphite particles were used as the catalyst. The samples were heated at 600 C in a gas mixture of CO 75 Torr, N2 75 Torr and H2 550 Torr for three days. Trans mission electron microscope analy…
The article deals with the regularities of wear and surface destruction of metals during friction under three-dimensional loading conditions (impact and slippage in two mutually perpendicular directions). The possibility of using the proposed technique for accelerated wear-resistance tests under complicated loading is…
In order to investigate Ca evaporation behavior in the electron beam melting process, metallurgical-grade silicon was melted in an electron beam furnace with different experimental conditions. The results showed that the content of impurity Ca was significantly decreased in the early time, while these changed slowly w…
In the present work, heat oxidation treatment was carried out for improving the photocatalyst activity of TiO2/Ti composite film. The microstructures and photocatalytic activity of the composite film were investigated. Effect of heat oxidation treatment was discussed. The results show that crystallinity of TiO2 in the…
The ability to calculate the field of a set of arbitrarily charged and arbitrarily arranged rectangular areas was considered. The result was verified by calculating the recorded field on a magnetic tape.
Specific features of phase formation in the K2CO3-Sb2O3-WO3 system were studied. It was found that roasting at 1123 K gives rise to phases of variable composition K x Sb x W2 − x O6 (1.0 ≤ x ≤ 1.375) having a pyrochlore-type structure. A model of ion population of a regular system of points of this structure was propo…
The migration of dye molecules and healing of structural heterogeneities (internal interfaces) in an amorphous-polymer-dye system during thermal treatment are studied for the PVC-Rhodamine 6G composite prepared via the method of solvent crazing. The kinetic data on the above processes are collected through spectroscop…
The liquid-phase sintering of the Al-Si system is performed in two stages, namely, an increase in the volume (growth) of the powder body (first) and then shrinkage (second). The bulk variations are caused by the diffusion nature of the interaction between two metals, one of which is in a liquid state. The formation me…