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。
Transformation optics provides great versatility for precisely manipulating electromagnetic waves. It has been extended to other fields including acoustics, thermotics, and electrics. Taking advantage of the transformation electrics method, we demonstrate that the square-shaped cloak can guide electric current around…
An elastic homogeneous isotropic material with a right line inhomogeneity embedded in the material under Anti-shear is analyzed; the mathematical model of the problem is a boundary value problem formulated using the mellin transform and solved by the Wiener-Hoph Techniques. A closed form solution for displacement is o…
The elasto-plastic-damage behavior of anisotropic aluminum alloys is investigated under finite deformation using a physical mechanism based constitutive model. With an application to the structural calculation,the present model is used to describe and analyze the mechanical response of anisotropic 6260-T6 aluminum all…
In the present paper,the structural,morphological and optical properties of PbI2 thick films prepared by close-spaced sublimation technique were investigated.It was found that the thickness of PbI2 films decreased from 1 000μm to 220μm with the increase in the sublimation source temperature.X-ray diffraction(XRD)patte…
LaCoO3/tourmaline was prepared as catalysts on the methane catalytic combustion. As additive tourmaline, its effect on crystal growth and catalytic activity of LaCoO3, were investigated via X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), H2-temperature programmed reduc…
NaEu( MoO4)2- x( WO4)xsolid solution microcrystallines were synthesized by hydrothermal method. The structure,morphology and photoluminescent properties of the microcrystallines were studied by X-ray powder diffraction( XRD),scanning electron microscopy( SEM) and fluorescence analysis( FA). XRD results show that NaEu(…
0.34 La 0.51 TiO Si/SrRuO 上的 2.94 ( LLTO ) 3 ( Si/SRO )底层，在自然的一个离子的售票员，表明电子性能。尽管 SEM 图象显示出连续、光滑的微观结构，由传播电子显微镜学(TEM ) 的微观结构的仔细的检查表明观察尖铁显示电子性能。因此，我们能断定陶器的涂层能服务多重目的，但是他们的性质是微观结构依赖者。
Advances in methodology, software and power of supercomputers make computational approaches, spe- cifically, density functional theory (DFT), capable of pro- viding qualitative, and in many cases quantitative, insights into catalysis. In this article we adopted a multiscale mod- eling paradigm in combination of DFT ca…
The crashworthiness is an important design factor of civil aircraft related with the safety of occupant during impact accident. It is a highly nonlinear transient dynamic problem and may be greatly influenced by the uncertainty factors. Crashworthiness uncertainty analysis is conducted to investigate the effects of in…
Carbon-based iron nitride nanocomposites were prepared by means of preoxidation and then carbonization of a uniformly blended mixture nano-iron powders and liquid polyacrylonitrile.The prepared nanocomposites were characterized by X- ray diffraction(XRD),scanning electron microscopy(SEM),and transmission electron micr…
In this work, bionic-superhydrophobic surfaces on aluminum alloy 5083 are fabricated by reciprocating- type high-speed wire cut electrical discharge machining based on the hydrophobic property of the rice leaf. Sub- millimeter-scale rectangular grooves are processed on the surfaces. The superhydrophobic surface has sh…
With TEOS and MTES as precursors,nano-silicone permeable protective coating of marine concrete was prepared by acid/base two-step sol gel method where hydrochloric acid catalyzed silica sol was dropped into proportionally ammonia catalyzed base silica sol.The structure and properties of the coating were characterized…
利用三（o-溴苄基）溴化锡与吡咯烷基二硫代甲酸钠反应,合成了三（o-溴苄基）锡吡咯烷基二硫代甲酸酯.用X射线单晶衍射测定了其晶体结构,化合物为三斜晶系,空间群P1,晶体学参数a=0.91354（11） nm,b=1.07313（13） nm,c=1.52677（18） nm,α =75.440（6）＆#176;,β=89.499（6）＆#176;,γ=72.515（7）＆#176;,V=1.3781（3） nm3,Z=2,Dc=1.868 g/cm3,μ（MoKα） =54.43 cm-1,F（000） =752,R1=0.0320,wR2=0.0765.化合物中的锡原子为四配位畸变四面体构型.对其结构进行量子化学从头计算,探讨了…
设计在熔化反应堆被过去常的第一墙材料的准备，描述，和测试在材料科学仍然是挑战性的问题。这个工作使用在 CASTEP 包裹实现了在 WTiC 材料的结构的稳定性上学习做的钛碳化物的影响的第一原则的方法。计算全部的精力和热含量被用作标准判定与对称的考虑造的结构的模型。我们的模拟显示做的 TiC 趋于形成它的自己的领域直到调查 nano 规模，它暗示可能的阶段分离。这结果为 WTiC 材料的合成性质揭示内在的原因并且在 nano 规模为试验性地观察的阶段分离提供解释。我们的途径也在在耐久性上解释做的部件的提高的效果上打开一盏灯，可靠性，腐蚀抵抗，等等，在许多特殊的钢。
尽管许多努力集中于稳定的非结晶的钙磷酸盐(ACP ) 的准备，在水的答案，可分散性和在水的答案的 ACP nanoparticles 的长期的稳定性的 nanoparticles 仍然是一个未解决的问题。在这个工作，稳定的胶体的 ACP 被在水的答案把器官的 bisphosphonate (BP ) 用作一个位地妨碍的代理人准备。收获的钙磷酸盐 nanoparticles 被诱导地联合的血浆描绘原子排放 spectrometry (ICP-AES ) ， Fourier 变换红外线(FTIR ) ， X 光检查衍射(XRD ) ，散布的动态光(DLS ) 和传播电子显微镜学(TEM ) 。ICP-AES， FTIR 和 XRD 结…
Dynamic softening mechanism of 2099 alloy was investigated by isothermal compression tests,thermal activation parameters calculation and comparison, EBSD and TEM techniques. On the basis of ZenerHollomon parameter(Z) and deformation temperature(T), combining thermal activation parameters and microstructures analysis,…
SBA-15 supported Mo catalysts(Moy/SBA-15) were prepared by an ultrasonic assisted incipient-wetness impregnation method. The physical and chemical properties of the catalysts were characterized by means of N2-adsorption-desorption, XRD, TEM, UV-Vis, Raman, XANES and H2-TPR. The results showed that a trace amount of Mo…
A novel class of cell probe structured as gold nanostar@SiO2@CdTeS quantum dots@SiO2 nanoprobes with multifunctional (MFNPs) fluorescent and photothermal properties were demonstrated. The MFNPs with good homogeneity (129 ± 10 nm) and dispersity were synthesized by a liquid phase method. The fluorescence signal of quan…
It is well known that in peak-aged conditions age-hardenable aluminum alloys usually have high strength but low corrosion resistance. Low corrosion resistance of peak-aged Al alloys limits their applications in some corrosive conditions. In order to enhance the corrosion resistance, over- ageing treatments are often c…
A method of automated ultrasonic testing based on the use of a PAA flaw detector for the recording of echo signals followed by the reconstruction of the image of reflectors by applying the 3D variant of the method of projection in the spectral space (3D PSS) is considered. Customized setting of the PAA flaw detector m…