Materials Literature
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In our present study, we attempted to grow the single crystals of (2 E )-1-(4-chlorophenyl)-3-[4-(methylsulfanyl)phenyl]prop-2-en-1-one by making use of the slow evaporation solution growth technique at room temperature. But the single crystal X-ray diffraction technique revealed that the grown crystal was a co-crysta…
The oxidation of three-dimensionally ordered macroporous (3DOM) CeO2 (ceria) by H2O and CO2 at 1100 K is presented in comparison to the oxidation of nonordered mesoporous and sintered, low porosity ceria. 3DOM ceria, which features interconnected and ordered pores, increases the maximum H2 and CO production rates over…
CaCu3Ti4O12 (CCTO) ceramics doped with rare earth (RE) oxides, including Y2O3, La2O3, Eu2O3, and Gd2O3, were prepared by the traditional solid–state reaction method in order to investigate the effect of RE oxide dopants on the electrical properties as a varistor. The phase identification and morphology of the ceramics…
Abstract Microporous polymer networks, composed of structure‐directing monomers (tectons), can exhibit high permanent surface area and porosity. By choice of suitable tectons various functionalities can be introduced into such networks. Here we introduce chiral BINOL derivatives as novel tectons to generate microporos…
PURPOSE: This research was conducted to assess the biocompatibility of the core-shell Fe(3)O(4)@ Au composite magnetic nanoparticles (MNPs), which have potential application in tumor hyperthermia. METHODS: Fe(3)O(4)@Au composite MNPs with core-shell structure were synthesized by reduction of Au(3+) in the presence of…
Poor filling occurs during the injection molding process of micro- or nano- scale patterns mainly because the hot polymer melt rapidly cools and its skin quickly solidifies upon contact with the mold surface. In this study, it is proposed to use Polyethylene terephthalate (PET) film coated with patterned polyurethane…
Polyethylene terephthalate (PET) fibers containing different contents of β-nucleating agent (β-NA) were meltspun from a reconstructive melt flow index rheometer at 270°C, and then blended with polypropylene (iPP). The supermolecular and phase structure of the composite were investigated by polarized optical microscopy…
The control method of the initial arc ignition in the gas-shielded welding is offered. It is based on the short-circuit current limitation after heating the wire stick-out with the metal passing current to the plastic state for the time of the wire burnout approach point at the stick-out-to-work distance not exceeding…
The hardened layer thickness effect on the electromagnetic transducer signal is investigated. The accuracy increase of the nondestructive testing under the combination oscillations in the thickness measurement problems is estimated.
Presented processes of diffusion heat treatment of metal pieces in powdered environment. Proposed method, that is possible accelerate organized of diffusion layers and reduce power expenses. Presented results of practical application of this metod.
Some prerequisites of evolutionary epistemology are considered. Its conceptual flaws are revealed. Some possible approaches to overcoming them are suggested.
The modern concept of the machine-building enterprise development involving the idea of the systematic umbrella approach plays a crucial role in the economy. The approach permits the researcher to study the enterprise system behaviour as an integrated mechanism, rather than to concentrate upon its single elements. The…
The possibility of using colored Petri nets for the analysis of key distribution cryptographic protocols as an example of symmetric Needham—Schroeder protocol is reviewed and evaluated.
The underwater repair technique of the offshore drilling platform low-alloy steel support of 38 mm wall thickness is developed. It ensures the required quality of the weld without preheating the base metal.
While adhesiveness is required for polymer surfaces in special applications, tacky surfaces are generally undesirable in many applications like automotive interior parts. The tackiness of polymer surface results from a combination of composition and additivation, and it can change significantly in natural or accelerat…
The matter and basic features of the synergetic method as a vitality saving tool with the simultaneous search of new development alternatives in the behavioral research on complex systems are considered.
The mathematical simulation of the interaction of kinematic perturbations of the tool shape-generating movement trajectories and the workpiece is considered. They de-fine one of the key factors determining the parameters of part manufacturing accuracy. The data for the effect not only of the interacting dynamic subsys…
Приводятся основные теоретические и экспериментальные результаты исследований рекуперативной гидромеханической системы стенда испытаний объёмных гидромашин. Показаны основы её математического моделирования. Рассмотрены характерные особенности выхода системы на рекуперативный режим, а также факторы, влияющие на его уст…
The theoretical and experimental investigations on the development features of the structural heredity of high-speed steels under the hypernonequilibrium phase transitions are carried out. The average austenite grain diameter after different options of the volume and surface heat treatment, that permits to estimate th…
Studies on the filler wear under the heavy loading by the hardened surface rolling friction have been carried out on the special facility using test pieces built-up with the abutting inductor through the continuous sequential melting of the prefixed batch layer.