Materials Literature
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A series of Nb40Ti30+xNi30−x alloys are characterized in terms of microstructure, crystal structure, ductility, susceptibility to hydrogen embrittlement, and hydrogen permeability as non-palladium-based hydrogen permeation alloys. The maximum hydrogen permeability and ductility of the alloy is exhibited by the alloy w…
(K0.52Na0.48)1-xLix (Nb1-xSbx)O3 lead-free ceramics were prepared by solid state reaction and the electrical properties of the ceramics were characterized. The crystalline phases and microstructure of the ceramics exhibit much dependence on the content of x, and the orthorhombic and tetragonal phases of the samples co…
In this letter, the technique of laser self-mixing effect is employed for nano-particle size analysis. In contrast to the photon correlation spectroscopy (PCS) and photon cross correlation spectroscopy (PCCS), the main advantages of this technique are sensitive, compact, low-cost, and simple experimental setup etc. An…
A translucent and superhydrophobic surface was prepared with a sol–gel method on a glass substrate. The coating solution was obtained by hydrolysis of a chelate compound of aluminum isopropoxide and ethyl acetoacetate. Then, the films were prepared by dip-coating the glass substrates and subsequent surface modificatio…
We have performed a temperature-dependent angle-integrated laser photoemission study of iron oxypnictide superconductors LaFeAsO:F and LaFePO:F exhibiting critical transition temperatures (Tc's) of 26 K and 5 K, respectively. We find that high-Tc LaFeAsO:F exhibits a temperature-dependent pseudogap-like feature extend…
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The structural, elastic, and electronic properties of the hard material ReB 2 have been investigated by means of density functional theory. The calculated equilibrium structural parameters of ReB 2 are in agreement with the experimental results. Our result of bulk modulus shows that it is a low compressible material.…
Luminescence spectroscopy is applied to multicrystalline p-type silicon. Photoluminescence spectroscopy, cathodoluminescence spectrum imaging, and defect luminescence imaging are used for the characterisation at temperatures from 21 K to 300 K. A defect line, persistent up to ambient temperature, was found in the phot…
This paper gives information about the external morphology, distribution and ecology of Diadesmis confervacea (Grunow) Hustedt, based on material collected in freshwater environments from the Coastal Plain of southern Brazil. The species was found solitary and colony-forming within the plankton and metaphyton of lakes…
O in proper proportions. A 2M solutions of NaOH was prepared as a precipitant. In order to achieve high pH value for simultaneous precipitation of all the hydroxides, the starting solution (pH value about 3.5) was added to the alkali solution and a suspension (pH = 10.5) containing dark green intermediate precipitates…
Zinc oxide (ZnO) thin films were prepared on glass substrate by sol-gel dip-coating method. The structural properties were investigated by x-ray diffraction (XRD) method and atomic force microscope (AFM). The optical properties were measured by UV-Vis spectrophotometer. The XRD patterns showed that the films formed pr…
在现在的研究，一种湖泊的壳(Hyriopsis cumingii ) 的微观结构被使用扫描电子显微镜学，和壳珠母贝的机械行为实验观察并且测量被使用弯曲和张力的测试执行。它的微观结构上的壳珠母贝的机械性质的依赖被使用一个修改砍落后模型，和全面压力紧张关系分析被获得。试验性的结果表明壳珠母贝的机械性质强烈取决于湖泊的壳的水内容。干燥珠母贝显示出易碎的行为，而弄湿珠母贝显示强壮的韧性。比作张力的测试，弯曲测试过高估计力量并且低估幼仔的模量。修改砍落后模型能有效地描绘珠母贝的变丑特征。
The effects of hydrogen and pre-strain on tensile properties of JIS-STPG 370 carbon steel pipe for hydrogen pipelines were investigated. In order to pre-charge hydrogen, the specimens were immersed in a 20 mass% aqueous solution of ammonium thiocyanate at 313 K for 48 h. The hydrogen content increased with increasing…
Fabrication of silver nanoparticle (AgP) - polyion alternate films were successful by using layer-by-layer technique. Alternate films of AgPs and polyion were fabricated as follows. First, a quartz glass substrate or an indium-tin-oxide (ITO) substrate was poured into the solution of polyethyleneimine (PEI) and then p…
In this investigation, the influences of two kinds of agricultural residues (Wheat and Barely straws) mixed with aspen particle were studied for use as insulation boards. the manufacturing parameters were: a kind of straw(Wheat and Barely straw), different percentage of straws ( 0/100, 10/90, 20/80 and 30/70 weight of…
High-C SiOC glasses have been synthesised starting from linear and cyclic SiH-containing polysiloxanes through sililisation. The amount of C has been increased by using divinylbenzene as a crosslinking agent. SiOC glasses have been obtained by pyrolysis in inert atmosphere at temperatures ranging from 1000 to 1400°C.…
Uniaxial tensile tests of ethylene tetra fluoro ethylene(ETFE) foils are described in this paper.Three kinds of ETFE foils with different thicknesses are used in the tests and the specimens are cut from foils along the machine direction(MD) and the transverse direction(TD).The tensile strength,the tensile strain at br…
The structure of borosilicate glass was analyzed by infrared spectra, the thermal expansion coefficient and expansion sof- tening temperature were measured by dilatometer, the phase separation of glass was investigated by scanning electron microscope and the component of silicon-rich phase was analyzed by X-ray energy…
Chemical and phase composition for new high-rhenium single crystal Ni-base superalloy is computer designed. The microstructure, liquation coefficients and misfit-factor of alloy single crystals as cast condition and after thermal treatment are studied. High-temperature creep tests within the temperature range of 900-1…
We have performed systematic ultrahigh-resolution photoemission spectroscopy on the iron-based superconductor LaFeAsO 1- x F x ( x =0-14%) to elucidate the evolution of electronic states with doping. We found that the density of states (DOS) around the Fermi level of the superconducting sample is markedly smaller than…