Materials Literature
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In this article the technique to study stochastic fluctuations or harmonic elements of contact devices in the presence of noise, based on the application of laser holographic interferometry for construction. Restoration of the amplitude of vibration of the surface of its holographic interference diagrams a complex and…
通过对等温锻造GH4169G进行不同工艺的热处理和组织形貌观察，研究了热处理工艺对合金组织与蠕变性能的影响。结果表明，GH4169G合金经直接时效处理后的组织结构由γ基体、γ'、γ''及δ相组成，且晶粒尺寸约为10 μm~15 μm，并存在较多孪晶组织，其中，粒状δ相分布于晶内，而大量细小γ'和γ''强化相在晶内弥散析出，是使合金具有较好蠕变性能的主要原因。与直接时效处理合金相比，经标准热处理后，合金的晶粒尺寸无明显变化，组织结构仍由γ基体、γ'、γ''及δ相组成，但孪晶数量明显减少，且有块状和针状δ相沿晶界不连续析出，其中，元素Fe、Cr富集于近晶界区域，是使其δ相具有针状形态的主要原因。 By means of heat t…
The results of calculation of the electronic structure of the alloy on the basis of the research the difference Ref, ionization potentials, the study of interatomic bonds of components and the calculation of the electronic energy levels of the atoms of the components. On the basis of the developed technique is propose…
In this study, an electret charging method for fabricating energy harvester with SiN/SiO_2 film that is selectively charged by using biased electrodes is demonstrated. Inorganic material of SiN and SiO_2 have high thermal robustness to endure the soldering temperature and the electret charging method by using the bias…
Water treatment facilities for agriculture Proposed scientific basis of process equipment for water treatment using nanotechnology ozone-sorption of water purification.
This paper briefly reviews the prospects, research focus, and problems of solar cells. Based on it, the primary design concepts and research progress of new generation solar cells including sunlight-concentrated, multi-junction, intermediate band, up conversion and down conversion, nanowire or nanopillar array, multi-…
SiGe, as a reliable and most efficient high-temperature thermoelectrics, has been utilized in special fields for many years, but there is no large-scale commercial application due to its high cost and low efficiency. Therefore, it is necessary to improve the dimensionless figure of merit ZT of a Si-based system, free…
The purpose of this paper is to examine how material choices are made in practice by structural engineers and by implication how material behaviour is understood. The research uses documents from recently completed design projects. By extracting specific design ideas and decisions from project documentation and catego…
The synthesis of cam mechanisms to minimize the condition of contact stresses in higher kinematic pairs is considered. The obtained results are based on solution of a minimax problem.
The task of radial tube deforming of a crasher element with axial symmetry made from elastic and viscose plastic material undergoing powder gas pressure in the artillery camera has solved. Energy dissipation is estimated and effect of counteraction on the part of air, compressed in an internal cavity.
The article deals with the forming of brake ribs of diffrent heights from various sheet-metal thicknesses to evaluate the required force with which the required holding force will be in correlation in the actual tool, thereby avoiding non-stamping of break ribs when clamping the blank holder at the start of the drawin…
Developed a set of women's tennis, which consists of kombidressa, skirts, shorts and jackets. Selected range of knitted fabrics, tests to determine the operational and technological characteristics. Knitted fabrics are chosen with the help of an expert evaluation method of quality materials
The design-engineering techniques to improve hydraulic and, accordingly, thermal characteristics of the liquid cooling radiator of the communications-electronics equipment (CEE) beamformer rack are presented. The liquid cooling method of CEE permitting to remove heat flows from small areas is considered. CAD-CAE simul…
In this work we will review some of the most promising new technologies for n- and p-type thin film transistors based on oxide semiconductors either in the form of nano-films or nanoparticles, with special emphasis to solution-processed, and we will summarize the major milestones already achieved with this emerging an…
A titania-supported nickel catalyst was prepared and tested in methanation in order to evaluate its catalytic properties (activity, selectivity and specially, activity loss), and compare it with an alumina-supported nickel catalyst. The titania-supported catalyst did not only show higher stability than alumina, but al…
Given the analytical description of the dependences of the impart of the errors of the position and shape of the contact surfaces on the contour and the relative area of the contact spot of mating surfaces, as well as on security soot. The solution of the inverse problem definition of permissible errors of position an…
Hot-compression of aluminum alloy 5182 was carried out on a Gleeble-1500 thermo-simulator at deformation temperatureranging from 350 °C to 500 °C and at strain rate from 0.01 s 1to 10 s 1with strain range from 0.7 to 1.9. The microstructures andmacro-textures evolution under different conditions were investigated by p…
The aim of this research was to modify polyamide 6 (PA6) either starting from low molecular weight end modified polymer or high molecular weight commercial grade by solution and/or solid-state polymerization (SSP) without destroying the crystalline phase. Synthetic approach consisted of first molecular mixing of all c…
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A complete model for the heavily doped and/or highly excited Si:P dielectric function is presented in the limit of the free-carrier gas approach. New interesting features of Si:P dielectric functions are presented and discussed. The influence of dopants and free-carriers is taken into account independently and their c…