Materials Literature
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Carbon nanotubes and semiconductor nanowires have been thoroughly studied for the future replacement of silicon-based complementary metal oxide semiconductor (CMOS) devices and circuits. However, the organisation of these nanomaterials in dense transistor arrays, where each device is capable of delivering drive curren…
Considering the eddy current effect of the magnetic metal particles in a high frequency electromagnetic field, we extend the Maxwell–Garnett law by introducing the eddy-effect parameter A which is as functions of the radius, permeability and electric conductivity of the metal particle medium. It is obvious that the co…
The role of two different Li salt, lithium hexafluorophosphate, LiPF6, and lithium bis(trifluoromethansulfonyl) imide, LiTFSI, in mixtures of two ionic liquids, N-methyl-N-butyl pyrrolidinium bis(trifluoromethansulfonyl)imide (PYR14TFSI) and N-methyl-N-propylpyrrolidinium bis(fluorosulfonyl)imide (PYR13FSI) has been i…
Passivity has become a critical issue while modeling high-speed networks characterized by tabulated data. For modules containing long delays, macromodeling based on delayed rational functions has been gaining popularity in recent years. However, there are currently no passivity verification or enforcement methods avai…
A new spectroscopic system for direct photoluminescence of lanthanide ions (Ln(III)) through electronic transitions within the 4f(n) manifold is described. The system is based on an injection seeded frequency tripled (lambda = 355 nm) Nd:YAG pump laser coupled with a master oscillator power oscillator (MOPO). The MOPO…
Cet article étudie les grandes classes de matériaux pour aimants permanents et leurs propriétés. Ces familles sont les alnicos (alliages isotropes, anisotropes, à cristallisation dirigée et frittés), les ferrites (comprenant les ferrites durs et les ferrites liés), les samarium-cobalt et les néodyme-fer-bore. Ces maté…
Mn-substituted $BiFeO_3$ (BFO) thin films were prepared by r.f. magnetron sputtering under an Ar/ $O_2$ mixture of various deposition pressures at room temperature. The effects of the deposition pressure and annealing temperature on the crystallization and electrical properties of BFO films were investigated. X-ray di…
Cu with high density nanotwins has been proven to possess excellent mechanical properties and electrical properties. In this study, nanotwins have been successfully introduced in Cu thin films and interconnect lines in trenches down to 150 nm line width. Nanoindentation measurements of hardness show that Cu with some…
The hydrocarbon-group composition of short residues having different values of specific viscosity was studied. The influence of the hydrocarbon-group composition of short residues from West Siberian crude oils on the kinetic behavior in the oxidation process and the physicochemical properties of air-blown asphalts was…
Hardened steel is widely used for good mechanical property, but its machinability is bad comparatively. It is efficient to enhance metal removed rate when high speed milling (HSM) hardened steel, but tool wear is rapid. In this paper, high-speed milling experiments were carried out for hardened steel with TiAlN coated…
As the result of different ratio of reactants, two novel mixed–ligand complexes with different structures have been synthesised and characterised by IR and electronic spectra. In [Cu(L)(NCS)] 2 ·0.5H 2 O, (L = N,N-dimethyl-N ‘ – (pyrid-2-ylmethyl)ethylenediamine), there are two crystallographically independent mononuc…
High nickel-base alloy, such as G3, is famous for its corrosion resistant, high intensity and other characteristic, which is popular in petroleum extraction and other heavy industry. However its poor machinability is a big obstacle to launching this material in its application. This paper introduces the poor machinabi…
Predictive maintenance of high voltage equipment requires levels of partial discharge warning to trigger corrective action and prevent failures. This leads to the need of establishing a reliable way to compare readings from different on-line and conventional off-line partial discharge detection systems. To achieve com…
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提高催化剂的活性和效率是当代化学面临的三大挑战之一. 然而, 催化活性点的位置、反应机理和选择性, 以及在分子和电子结构水平上对异相催化的理解在大多数情况下依然不清楚. 气相团簇是研究固相催化剂活性位点的理想模型, 因为它们具有完整的结构和尺寸依赖性, 并且能够通过实验和理论进行研究. 对团簇反应的研究能够为相应的固相催化过程提供机理方面的深入理解. 由于钒的氧化物是一类在工业上被广泛应用的重要催化剂, 因此国际上进行了很多关于钒氧团簇的实验和理论研究, 以便能够在分子水平上加深对钒氧化合物催化活性的理解. 相对于实验, 团簇理论计算的优势在于能够详细给出反应路径和中间体, 从而明确阐述反应机理. 迄今为止, 研究人员已经从理论上…
In this study, two psychophysical models are proposed to predict perceived footwear fit with consideration of foot-shoe dimensional differences in the toe, metatarsophalangeal joint (MPJ) and mid-foot regions. A third-degree polynomial was constructed to predict the preference rating on a 7-point Likert scale from per…
Abstract The method of potentiometric titration using oxygen sensors with solid electrolyte membrane was applied to study the interaction of curium cations with oxygen anions in the molten alkali metal chlorides in the temperature range of 450–850 °C depending on oxy-acidity of melt. Assumptions were made concerning t…
Abstract Doloma (sintered dolomite) having a 0.5 wt.-% optimum mill scale content were used to form bricks with addition of resin and graphite, so that the effects of graphite was evaluated. Dolomites were first sintered at a temperature of 1750°C for four hours, and then mixed with various additives to prepare mixtur…
The work concerns diagnosis of the origins and development of early stages of defects based on information found in vibroacoustic signal. At the beginning the necessity of selection of diagnostic parameters dependent upon the amount of dissipated energy and related defect development is proven. Emphasizing the fact th…
Article Achieving Fast and Reliable TEM-Sample Lift-out and Transfer Using Novel Materials and Novel in-situ Tools was published on May 1, 2009 in the journal Practical Metallography (volume 46, issue 5).