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。
MgH2, rather than Mg, was employed as a starting material in this work. A sample with a composition of 82 wt% MgH2-18 wt% Ni (designated MgH2-18Ni) was prepared by reactive mechanical grinding. Its hydriding and dehydriding properties were then examined. An MgH2-Ni hydrogen-storage alloy that does not require an activ…
The oxycarbonate Sr7Co4(CO3)O11.36 exhibits a peculiar structure that has been characterized by combining transmission electron microscopy analyses and neutron diffraction. It consists of a regular intergrowth between the m = 2 and carbonated m = 3 members of the Sr(m+1)Co(m)O3(m+1) Ruddlesden-Popper (RP) series, Sr3C…
Seeking revolutionary improvement in the performance and weight of composite structures, Cessna Aircraft Company, with sponsorship from the NASA Fundamental Aeronautics Program/Subsonic Fixed Wing Project, is developing a protective skin concept which would allow the primary composite structure to only carry load and…
The interfacial properties of structurally defective single-walled carbon nanotube (CNT) embedded polymeric nanocomposites are quantitatively characterized through molecular dynamic simulations. Three different kinds of point defects including single vacancy, single adatom, and Stone-Wales are generated to pristine CN…
Hysteresis is the dependence of a physical property, not only on the present controlled parameters, but also on the path travelled. Although Shape Memory Alloys (SMAs) exhibit a myriad of nonlinearities, SMAs show two major types of nonlinear hysteresis. During cyclic loading of the SMAs, it is observed that one type…
Development of a multiscale computational model for analyzing plasticity in polycrystal materials is reported in this article. The model is based on crystal plasticity theory along with the Generalized Method of Cells (GMC) micromechanics theory for homogenization. A preprocessor tool is developed to create polycrysta…
Finite element simulations representing thermal barrier coatings on turbine blades enabled mapping of the stress evolution within the multi-layer configuration under thermalmechanical conditions. The study aims to accurately model the transient strain behavior throughout a load cycle due to plasticity, creep, and oxid…
Se estudio la composicion, estructura y dinamica de la comunidad fitoplanctonica en relacion a parametros bioticos y abioticos en cinco lagunas de la turbera de Rancho Hambre, situada dentro de la Reserva Natural y Paisajistica del Valle de Tierra Mayor, (Tierra del Fuego). El analisis de las caracteristicas fisico-qu…
Polylactide fibers (PLA), textured by false twist at different temperatures (135, 150 and 165℃) and draw ratios (1.30, 1.35 and 1.40) were stabilized by the application of a continuous thermal treatment at 100℃ and 50 m/min. The effect of thermal stabilization on the microstructure was determined by physicochemical te…
In this paper, we firstly synthesized glycyrrhetinic acid-modified double amino-terminated poloxamer 188 (GA–NH–POLO–NH–GA). The structure of the synthesized compound was confirmed by 1H-NMR and Fourier transform infrared (FT-IR) spectroscopy. Then the nanoparticles composed of GA–NH–POLO–NH–GA/chitosan (GA–NH–POLO–NH…
Hexadecasubstituted CoPc and ZnPc containing different number of N-methylpyridiniumoxy groups and chlorine atoms were synthesized. It was shown that increasing number of cationic groups leads both to increased solubility of complexes in dipolar aprotic organic solvents and in water, and to increased contribution of mo…
A multiscale modeling methodology, which incorporates a statistical distribution of fiber strengths into coupled micromechanics/ finite element analyses, is applied to unidirectional polymer matrix composites (PMCs) to analyze the effect of mesh discretization both at the micro- and macroscales on the predicted ultima…
Abstract C9H12ErO10.50, monoclinic, C2/c (no. 15), a = 20.415(2) Å, b = 9.8975(7) Å, c = 15.189(1) Å, β = 126.130(1)°, V = 2478.8 Å3, Z = 8, Rgt(F) = 0.0199, wRref(F2) = 0.0486, T = 296 K.
Directed self-assembly (DSA) of block copolymers (BCP) could enable high resolution patterning beyond the capabilities of current optical lithography methods via pitch multiplication from lower resolution primary lithographic patterns. For example, DSA could enable dense feature production with pitches less than 80 nm…
A uniform and protective film with high crystallinity has been prepared on biodegradable AZ91D magnesium alloy surface by the simple hydrothermal (HT) one-step treatment in three different alkaline solutions. The conventional alkaline treatment (AT) was also studied here for comparison. Scanning electron microscopy (S…
Transition metal atom generally takes various valences, and sometimes there are some 'missing valences', for example Fe usually takes 2+, 3+ and 5+, but does not take other valences so often. We have calculated the atomic multiplet energies for the high-spin and lowspin configurations within the ligand-field theory an…
For more than a decade, stent implantation has been strategically used for solving gastrointestinal dilemmas such as biliary stenosis. Predicaments like insufficient radial strength, low twisting ability, inappropriate dynamic behaviour and restenosis are expected to be solved by the introduction of new designs. Super…
Randomness in woven ceramic matrix composite architecture has been found to cause large variability in stiffness and strength. The inherent voids are an aspect of the architecture that may cause a significant portion of the variability. A study is undertaken to investigate the effects of many voids of random sizes and…
The oxidation of thiocyanate to polythiocyanic acid by peroxydisulfate was carried out in an aqueous solution at room temperature. The primary step is the decomposition of peroxydisulfate into sulfate-free radicals. At room temperature in the presence of peroxydisulfate as a oxidizing agent, HSCN polymerizes to (HSCN)…
In this paper the design and construction of an online non-invasive noninvasive partial discharges (PD) localization system is presented; it is integrated by four equal discone antennas with a wideband of 30 MHz to 1.2 GHz and a central frequency of 615 MHz connected to a four-channel high-resolution digital oscillosc…