Thermal stability of Ti-C-Ni-Cr and Ti-C-Ni-Cr-Al-Si nanocomposite coatings

The results of the microstructure, mechanical and tribological properties investigations of Ti-C-Ni-Cr and Ti-C-Ni-Cr-Al-Si nanocomposite coatings based on amorphous carbon in the initial state and after the annealing to 900 °C are presented. The effect of annealing temperature on the microstructure, tribological and mechanical properties of Ti-C- Ni-Cr and Ti-C-Ni-Cr-Al-Si nanostructured coatings is discussed

Investigation of the microstructure, mechanical properties and thermal stability of nanocomposite coatings based on amorphous carbon

The Ti-C-Ni-Cr and Ti-C-Ni-Cr-Al-Si nanocomposite coatings based on amorphous carbon and the nanosized particles were synthesized by magnetron method. The results of the microstructure features and mechanical properties investigations of these coatings are presented. The thermal stability of microstructure and properties of these coatings at tempering up to 900°C were investigated. These coatings have a high (11–18 GPa) hardness, low (μ < 0.2) the coefficient of friction and high thermal stability of the microstructure and properties up to 700°C. The features of elastically stressed state of nanosized particles in these coatings were founded. A high local internal stresses in the TiC nanoscale particles do not observed

Developed and developing countries: towards the common target with different speeds

Objective: to analyze the expected economic transformations in the 21st century in various countries of the world. Methods: abstract-logical method, methods of modeling of socio-economic self-organization, methods of long-term forecasting of world dynamics, theory of institutional matrices.Results: based on the performed analysis, the following conclusions are made: 1) in the coming decades, a complex continuum of types, transitions, combinations and forms of economic structures will be observed in the world (with an increase in the proportion of post-industrial forms). At the same time, there will be a shift towards strengthening distributive institutions in developed countries and a shift towards strengthening market institutions in developing countries that continue the processes of economic and socio-political modernization; 2) the process of internationalization of the labor force will be intensified (due to the development of remote employment) along with the internationalization of capital; 3) a new technological wave (2030s – 2070s) will bring new resources and expand the sphere for production and services, which will support economic growth in both developed and developing countries; 4) at the same time in some areas, in particular in medicine, a very significant regulation of economic activity is inevitable, while in other areas, in particular in robotics, economic mechanisms of a market-corporate type may strengthen; 5) thus, the most important task in the coming decades is to increase the flexibility of socio-economic development of all countries of the world, namely, gaining the ability to regulate the ratio of market and distribution mechanisms depending on the spheres of activity and tasks to be solved without the pressure of ideological dogmas.Scientific novelty: based on the historical trends analysis using the theory of institutional matrices, a forecast of economic transformations in the 21st century is made for the countries of various types and the expected features of these transformations are substantiated.Practical significance: the proposed methods of long-term forecasting can be used in strategic planning systems in the Russian Federation

Impact of hydrocarbon drilling mud on mud motor elastomers at different temperatures

The paper describes the experimental research of hydrocarbon drilling mud impact on engineering parameters of mud motor elastomer samples. It is believed to be urgent due to an increase in using mud motors in oil and gas well construction now, and the issue of intense exploitation is currently topical. The test results of elastomer IRP- 1226 dependent on the temperature are shown in the paper. It is proved that the hydrocarbon drilling muds have a significant impact on wearing of mud motors elastomers under the condition of a temperature increase

Properties of arsenic-implanted Hg1-xCdxTe MBE films

Defect structure of arsenic-implanted Hg1-xCdxTe films (x=0.23–0.30) grown with molecular-beam epitaxy on Si substrates was investigated with the use of optical methods and by studying the electrical properties of the films. The structural perfection of the films remained higher after implantation with more energetic arsenic ions (350 keV vs 190 keV). 100%-activation of implanted ions as a result of post-implantation annealing was achieved, as well as the effective removal of radiation-induced donor defects. In some samples, however, activation of acceptor-like defects not related to mercury vacancies as a result of annealing was observed, possibly related to the effect of the substrate

Accumulation and annealing of radiation donor defects in arsenic-implanted Hg0.7Cd0.3Te films

Processes of accumulation and annealing of radiation-induced donor defects in arsenic-implanted Hg0.7Cd0.3Te films were studied with the use of the Hall-effect measurements with processing the data with mobility spectrum analysis. A substantial difference in the effects of arsenic implantation and post-implantation activation annealing on the properties of implanted layers and photodiode ‘base’ layers in Hg0.7Cd0.3Te and Hg0.8Cd0.2Te films was established and tentatively explained

Localization and nature of radiation donor defects in the arsenic implanted CdHgTe films grown by MBE

By profiling the electrical parameters of the arsenic implanted CdHgTe films, grown by molecular bea

Fluence dependence of nanosize defect layers in arsenic implanted HgCdTe epitaxial films studied with TEM/HRTEM

We report on the results of comparative study of fluence dependence of defect layers in molecular-beam epitaxy-grown epitaxial film of p-Hg1-х CdхTe (х=0.22) implanted with arsenic ions with 190 keV energy and fluence 1012, 1013, and 1014 cm-2