Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
flow at near-ambient conditions whereas the latter should be minimized [1]. Despite some recent progress, few results have been reported on the room temperature dehydrogenation of formic acid using solid catalysts. Palladium-on-gold nanoparticles (Pd-on-Au NPs) in this study were precisely designed as 4 nm Au core wit…
The crystal structures and magnetic properties of Ni50-xCoxMn39Sn11 (8≤x≤10) Heusler alloys are investigated. As a result, we achieve the magnetic field induced martensitic transformation in Ni42Co8Mn39Sn11. It is found that the saturation magnetic moments of alloys increase with Co content increasing. Moreover, a sup…
We investigated the properties of impregnated activated carbons, a commercial adsorbent for the individual protection equipment, and examined CO adsorption and oxidation to . The surface area, pore volume and pore size were measured for four commercial samples using Brunauer-Emmett-Teller/Barrett-Joyner-Halenda (BET/B…
Various constitutive models of TiAl-based intermetallic alloys are introduced from macro and micro aspects in this paper.Firstly,the statuses about the Arrhenius models,Zener-Hollomon parameters and Z-A model used in describing the flow behaviors of TiAl-based intermetallic alloys at high temperatures or at high strai…
Anti-causticization of calcium carbonate in sodium aluminate solution was studied.The thermodynamic calculation result shows that the degree of anti-causticization reaction of CaCO3with NaOH solution to form Ca(OH)2is low at low temperatures,while that of CaCO3 with Al(OH)4- to form 3CaO.Al2O3.6H2O(C3AH6) is significa…
We report the structural and electrical characteristics of bulk La2NiO4 compounds synthesized by conventional solid state reaction route. The X-ray diffraction (XRD) was carried out to study the structure of samples. Rietveld refinement of XRD data confirm that the samples are of single phase and have tetragonal unit…
ASRによる膨張を模擬し鉄筋破断が生じた供試体実験から，内部からの膨張を受けた供試体の経時的な外観劣化性状や，鉄筋破断がひび割れ，変形などの外観劣化に与える影響について検討した．供試体は実構造物を模擬した1/4スケールとし，中空部に膨張モルタルを用いることでASR膨張を模擬した．また，実験パラメータは，鉄筋種別，帯鉄筋比，膨張量および曲げ加工半径とした．その結果，今回の実験では，帯鉄筋1本程度の破断で破断箇所近傍の変形やひび割れ性状に差異は確認されなかった．一方，鉄筋の銘柄により初期損傷が異なり，初期損傷が大きいほど鉄筋曲げ加工部での損傷進展は顕著となることが判明した．さらに，鉄筋の化学成分やシャルピー衝撃試験などから，初期損傷と…
摘要： 金属磁记忆检测技术是一种能对铁磁构件早期损伤进行有效诊断的无损检测技术。为进一步探索研究金属磁记忆检测的机理，选用粉纹法对Q235平板试样的磁畴结构进行观察，研究地磁场中不同应力状态下该铁磁材料的磁畴结构的变化特征,并且利用高精度弱磁检测装置获取其试件表面的漏磁信号规律。试验结果表明：随外载荷的改变，被观察部位的磁畴类型、畴壁形态有显著性变化，且不同区域的磁畴转变快慢不同但变化趋势相近；同时，随外载荷的增大，试件表面漏磁信号增大。验证了地磁场中铁磁材料的磁畴结构受应力作用发生磁畴移动与转向，并且在应力撤出后这种改变得以保留的规律。为铁磁材料磁记忆检测微观机理的进一步探索研究提供可靠、有效的试验依据。
This paper describes on a diagnostic method using gas analysis for terminals in aged 66-77kV XLPE cable lines. It was revealed from fundamental experiments and gas analysis of 45 terminals in actual XLPE cable lines that acetylene was particular gas produced by discharge at interface areas in terminals and the most su…
Высокая надежность интегральных схем специального назначения в металлокерамических корпусах на стадии производства достигается в результате минимизации содержания влаги в корпусе и постоянного измерения параметров среды герметизации. Показано, что использование приборов контроля режимов контактной сварки и приборов дл…
Next generation turnkey solutions for improving stabilized efficiency of a-Si/-Si tandem thin film solar modules are being developed, which will make a positive impact on thin film solar technology and industry. Advanced add-on technologies are being introduced to existing lines to improve solar module efficiency. Add…
Nano-porous V2O5 aerogel films were prepared by dip-coating vanadium oxide sol onto ITO substrate, using V2O5 powder, Benz alcohol, Isopropanol as precursor materials. The nano pores were characterized by scaning electron microscope (SEM). The electrochemical properties were investigated by chronopotenyiometry(CP) and…
The growth rate and uniformity of Carbon Nano Tubes (CNTs) based on Chemical Vapor Deposition (CVD) technique is investigated by using a numerical model. In this reactor, inlet gas mixture, including xylene as carbon source and mixture of argon and hydrogen as carrier gas enters into a horizontal CVD reactor at atmosp…
Three series of regular well-defined star polyisoprenes (PIs) with 3, 4 and 6 arms (each series: same arm molecular weight) have been synthesized by anionic polymerization high vacuum techniques and chlorosilane chemistry. In addition, three linear PIs with practically the double arm molecular weight of the correspond…
Finite element analysis (FEA) has been carried out for investigation of damping concrete under different impact loading conditions with a built-in material model and damage criteria available in FEA code ABAQUS. At first, all parameters for the selected material model had been derived from compression tests of cubic s…
Thermoelectric generation (TEG) is advantageous over traditional power production in terms of no vibration, no pollution, no noise, small volume, and long life expectancy. In this article, the authors will review the TEG, its current state of development, introduce its principal, and explore a new approach by the larg…
Normal (relative to the substrate) vibrations of single-layer graphene as a whole have been considered in the terms of simple models of epitaxial graphene and electron-phonon interaction. The consideration has been performed for both metal and semiconductor substrates. The presented evaluations show that the possibili…
The done before analysis of the low frequency resonances of the elastic spheroidal bodies, irradiating and establishing by the harmonic signal(1), supplemented with the research of the elastic spheroidal shell, irradiating and establishing by the pulse signal.
Electronic (β(e)) and vibrational (β(v)) first-order hyperpolarizabilities of uracil were determined in gas and water solution using the Coulomb-attenuating Density Functional Theory level with the Dunning's correlation-consistent aug-cc-pVDZ basis set. Frequency-dependent β(e) values were computed for the Second Harm…
Effective prediction of calcite scaling requires a reliable thermodynamic model for the prediction of the scaling tendency, a kinetic model for the prediction of scaling rate and a transport model to simulate flow in a porous medium. The accurate prediction of the scale deposition can warn the engineers to “treat” the…