Materials Literature
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In this paper, the procedures for evaluating the High Voltage (132kV, 275kV and 500kV) overhead lines performance due to lightning in TNB transmission is discussed. The historical tripping data is analysed and compared from the international standard IEC 60071-1 and other utility practices. Approaches for evaluating t…
Equilibrium processes of dimerization and H*- and J-aggregation of 3,3′-di-(γ-sulfopropyl)-5,5′-dichloro-9-methylthiacarbocyanine (TCC) in aqueous solutions have been investigated, and the thermodynamic parameters of the processes have been calculated. At least seven equilibrium forms of TCC have been found in aqueous…
We carried out an atomic-scale study of the behavior of nanoscale void defect in shock loading condition by the means of non-equilibrium molecular dynamic simulation. Atom trajectory and local temperature were investigated in different stages in the non-equilibrium process in the conditions with specific shock speed.…
Diante da necessidade de se obter um produto de origem animal que venha contribuir com o equilíbrio nutricional, bem como incentivar o consumo de carnes de pescado e seus produtos derivados, objetivou-se com este trabalho a elaboração de 3 formulações de fishburgers de tilápia, visando aderir qualidade, valores nutric…
Abstrak-Graphene merupakan satu lapis atom karbon yang mengalami hibridisasi sp 2 membentuk struktur heksagonal 2D.Graphene memiliki potensi besar untuk aplikasi nanoelectronic materials.Penelitian ini bertujuan menganalisis waktu ultrasonikasi dan hidrothermal terbaik untuk mensintesis Graphene.Graphene disintesis de…
Domain analyses of modern types of grain-oriented (GO) transformer steel are rare, and they are focussed on single grains under academic magnetization patterns. The present Kerr effect study reveals that grains of industrial, polycrystalline materials react in specific ways according to individual crystallographic ori…
The magnetic field distribution in and around thin ferromagnetic structures has been explored. Extrapolation and mathematical air flux compensation were used to obtain magnetic quantities on the sample surface and inside the sample, minimizing systematic errors for flux-metric and Gauss-metric measurements. A magneto…
We investigate the transport properties of a pair of Majorana bound states in a T-shaped junction, where two normal leads are coupled with an identical Majorana bound state. Both the scattering matrix and the recursive Green function method show that the peak value of the differential conductance ( G peak ) in units o…
Mixed ionic-electronic conductive (MIEC) perovskite material La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF6428) is a promising candidate for the cathode in intermediate temperature solid oxide fuel cells (IT-SOFCs). Understanding the three dimensional (3D) microstructural characteristics of such a material is crucial to its appl…
— Different algorithms for Hurst exponent estimation, namely aggregated variance, absolute moment, Higuchi and Peng method, are applied to eight different vibration signals obtained in induction motor aging process. Signals were obtained with accelerometers during an artificial fluting, thermal and chemical aging proc…
Os aos 9%Cr so amplamente utilizados alta temperatura, principalmente em aplicaes relacionadas gerao de energia. Ultimamente tm sido desenvolvidas variantes desses materiais incorporando B, W e Co, entre outros elementos, ao sistema de liga. Devido escassez de informao sobre a influncia do procedimento de soldagem sob…
Metal matrix composites (MMC) have become important materials in many technical fields. But above all there is a high amount of failures due to alternating stresses because of temperature changes. In this investigation the thermal fatigue behaviour of two metal matrix composites with different particle contents and th…
ABSTRACT In the paper, there are presented the analyses of iron Fe2p3/2 and chromium Cr2p3/2 and oxide O1s XPS spectra of surfaces obtained after abrasive and electrochemical polishing with additional treatment as chemical chelating in the solution containing of 10% Citric Acid and 2% Ethylenediaminetetraacetic Acid.…
The benthic algal flora of Karagöl Lake (Şavşat, Artvin) was investigated between October 2008 and September 2010. Actinotaenium diplosporum var. americanum, Cosmarium pseudoexiguum, Gonatozygon kinahanii, Staurastrum boreale var. quadriradiatum, S. hantzschii and Staurodesmus dejectus var. apiculatus were recorded fo…
In this article, SiC (silicon carbide) Nanopowder was synthesized by sol-gel method. TEOS and sucrose were used as pricier source. Final gel were prepared by mixing in different stirring times and different ratio in pH=4 and drying. This mixture was heated at 650°C and carbothermal reduction was carried out at 1500°C.…
We report on the high breakdown performance of AlGaN/GaN high electron mobility transistors (HEMTs) grown on 4-inch silicon substrates. The HEMT structure including three Al-content step-graded AlGaN transition layers has a total thickness of 2.7 μm. The HEMT with a gate width W G of 300 μm acquires a maximum off-stat…
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Influence of thermal annealing and effect of gamma irradiation on electrical conduction in Ge1-xSix (0 < x < 15) films were studied. The films were deposited from molecular beams in ultrahigh vacuum. The influence of thermal annealing and the effect of gamma irradiation were investigated by the X-ray diffraction analy…
The application of hard wear-resistant coatings is expanding into various sectors of industry to protect tools and other components from failure caused by wear and corrosion. However, in forming industry it is still rather an exception than a rule to find coated forming dies. This study has objectives to investigate w…
根据钢带表面的氧化脱碳与钢带内部的碳通量平衡, 建立了取向硅钢钢带在N2-H2-H2O混合气中高温脱碳的动力学数学模拟模型. 本模型引入有效氧位覆盖率概念以定量描述钢带表面选择性氧化对脱碳的影响. 根据合理设定的气固相界面处的边界条件, 对该模型的数值求解可以定量描述脱碳温度、脱碳气氛、钢带厚度对脱碳动力学的影响. 模拟计算结果表明, 脱碳的限制性环节在于钢带内部的碳扩散而不是在气固界面的脱碳化学反应, 只有提高退火温度而不是改变退火气氛才能有效加快脱碳速度. 因此对于较厚的取向硅钢钢带进行脱碳, 提高退火温度几乎是必然选择.