Materials Literature
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Considerable shear strain is necessary for manufacture of metallic materials with ultramicrograin structure. For flat rolling shear strain intensity is determined by two components: compression strain and shear strain . The vertical asymmetric sheet rolling process in rolling-drawing mode was investigated with the pur…
We have studied the single crystal growth and the physical properties of the UT 2 Al 20 system. We have successfully grown UT 2 Al 20 (T = Cr, Ti, W and Mo) using Al self flux and have characterized the crystals using electron probe microanalyzer (EPAM) and X-ray diffractometer. We have also measured their magnetic an…
Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.
Abstract The effectiveness of high frequency mechanical impact treatment for increasing the fatigue strength of welded structures has been investigated in several research projects over recent years. Based on extensive fatigue test data, design recommendations have been developed by different institutions. Most recomm…
The acoustic emission from the zone of the optical breakdown in liquid is experimentally studied. The spectral characteristics and energy of the acoustic wave that is generated in liquid due to expansion of the plasma formation initiated by the optical breakdown at a wavelength of 532 nm are analyzed. Two spectral pea…
The contribution of adult stem cells to cardiac repair is mostly ascribed to an indirect paracrine effect, rather than to their actual engraftment and differentiation into new contractile and vascular cells. This effect consists in a direct reduction of host cell death, promotion of neovascularization, and in a "bysta…
We analyze a fully stochastic model of heterogeneous nucleation and self-assembly in a closed system with a fixed total particle number M, and a fixed number of seeds Ns. Each seed can bind a maximum of N particles. A discrete master equation for the probability distribution of the cluster sizes is derived and the cor…
Abstract The heat treatment of steel is based on the physical metallurgical principles that relate to its processing, properties, and structure. The microstructures that result from the heat treatment of steel are composed of one or more phases in which the atoms of iron, carbon, and other elements in steel are associ…
A method of combined ion-beam crystallization of the Ge/Si multilayer nanostructures is proposed. Using atomic-force microscopy and electron microscopy, we observed the formation of an array of germanium quantum dots with lateral dimensions 〈a〉 = 12–15 nm at the following conditions: silicon-substrate temperature T =…
A new alternating conjugated polymer (PTCDPP) of carbazole‐substituted triarylamine and diketopyrrolopyrrole is prepared and characterized in detail. The polymer exhibits two strong absorption bands at 345 and 600 nm. With highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy…
Abstract The adhesion tendency of the polymers polyoxymethylene, polyamide 6.6 and polyether ether ketone against hard coatings to protect molds in polymer processing was evaluated by a combination of tribological tests, investigations of wear tracks and measurements of the coatings' surface energies. It was found tha…
We report a study of 1,4-benzenedimethanethiol (BDMT) adsorption on the (111) surface of the noble metals Au, Ag, and Cu performed from the vapor phase by ion scattering. The better known case of BDMT on the Au(111) surface is used for comparison. Ion scattering carried out in the forward direction to detect both scat…
In this work, the Nb–14Si–24Ti–10Cr–2Al–2Hf–0.1Y alloy (at.%) was processed by the liquid–metal-cooled directional solidification (DS) at 1750 °C with withdrawal rates of 1.2, 6, 18 mm/min and post heat treatment (HT) at 1450 °C for 10 h. The microstructures of the directionally solidified and heat treated samples wer…
The paper considersthe influence of nanostructured powder-modifiers on transfer of the electrode metal drop and the microstructure of a surfaced metal in consumable electrode welding in argon shielding. It is found, that welding with the nanopowder Al2O3is the most consistent process and application of nanostructured…
A simple, convenient and novel method was developed for the recovery of bisphenol-A from polycarbonate wastes under microwave irradiation. In this study bisphenol-A was recovered at a 100% yield by using a mixture of glycerol/water as the green solvent and sodium hydroxide as the catalyst, respectively. This methodolo…
Dielectric electro-active polymer (DEAP) materials are attractive since they are low cost, lightweight and have a large deformation capability. They have no operating noise, very low electric power consumption and higher performance and efficiency than competing technologies. However, DEAP materials generally have str…
The extreme sensitivity of Sm/Ba at high temperature in air becomes an obstacle to the fabrication of SmBCO single grains that exhibit stable and reliable superconducting properties. In this research, the superconducting properties of SmBCO single grains fabricated by top seeded melt growth (TSMG) from different batch…
The thermovoltaic effect in the semiconductor rare-earth compound samarium sulfide (SmS) is briefly described. The qualitative dynamic model of the effect for explaining the possibility of the long-term electric voltage generation on the basis of the thermovoltaic effect is proposed. The model uses a combination of th…
The optimum conditions for the extraction and separation of chondroitin sulfate from tilapia (Oreochromis niloticus) byproducts were studied in the paper. The chondroitin sulfate was extracted by the combination of ultrasonic and microwave. On the basis of the single factor tests, the response surface methodology was…
In this paper we present the electronic and magnetic properties of the honeycomb compound In 3 Cu 2 VO 9 . We find that the band dispersions display Dirac cone features in the nonmagnetic phase, as observed in graphene. The parent phase is a charge transfer insulator with an energy gap of about 1.5 eV. Singly occupied…