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。
X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and scanning electron microscopy (SEM) have been used to characterize surfaces of aluminum which have been pretreated by mechanical polishing, acid etching and alkaline etching, as well as given subsequent exposures to air and water. These surfaces…
This letter reviews the general model of transformers with off-nominal turns ratios used in power systems steady-state stud- ies. The conventional model of the load tap change transformer (LTC) is shown in terms of the analytical expressions that represent this de- vice. A general model incorporating the effects of th…
In polymer composites the interaction between polymer matrix and filler particles often results in nucleation of spherulites. The principles of polymer crystal nucleation and spherulite growth are investigated using scanning transmission electron microscopy (STEM) and microdiffraction techniques in combination with po…
The piezoelectric constants under two types of engineered domain configurations in perovskite-type oxide ferroelectrics were calculated in terms of the Landau-Devonshire-type free-energy function. It was found that the piezoelectric constants under the engineered domain configurations increase on approaching the morph…
An important part of a general simulation model of the Thermal DeNOx process is the detailed kinetic mechanism used to represent all the interconnecting reaction paths. Unfortunately, the location and dimension of the operating window investigated experimentally to validate a detailed kinetic mechanism strongly influe…
In metallic U-Pu-Zr fuel for fast reactors, metallurgical reactions occur between the fuel alloy and the stainless steel cladding, and a liquid phase may be formed in the reaction zone at a higher temperature. In order to clarify the condition for liquefaction at the fuel-cladding interface, the reactions of U-Pu allo…
Poly(ethylene terephthalate) (PET) is modified by a 248 nm KrF excimer laser with high (above ablation threshold) and low (below ablation threshold) energy irradiation. The PET surface develops a well-oriented periodic structure of hills and grooves or a “ripple structure” with high energy treatment. However, the ripp…
This study showed the complex interactions of alloying elements and their prevailing microstructure on the pitting corrosion. This interaction was illustrated by electrochemical tests of three grades of wrought duplex stainless steels. It was shown that SAF2507 had the highest pitting potential, followed by SAF2205 an…
We investigate the rheological behavior of Langmuir monolayers consisting of polyisoprene chains tethered by one end to the air/water interface. These 10−50 nm thick monolayers provide model systems of a molten polymer brush for which the ends can move within the interface. Their linear viscoelastic properties are det…
Abstract— Two basic approaches (pure component reference (PCR) and equilibrium reference (EQR)) to modeling silicate melt evaporation are explored. The PCR model calculates the maximum possible evaporation rates of the pure oxides from their equilibrium vapor pressures and rescales these rates according to the activit…
Abstract Having been treated with coupling agent and pan‐milling, graphite is incorporated into HDPE to make a HDPE/graphite composite with enhanced thermal conductivity as well as good mechanical properties and processibility. This paper focuses on the study of mechanical properties, thermal stability and rheological…
YCa 4 O(BO 3 ) 3 has been found to be 90° phase-matchable for type-1 second-harmonic generation at 0.4168 µm along the z -axis at 20°C. The improved Sellmeier equations of YCa 4 O(BO 3 ) 3 that correctly reproduce our new experimental data for second-harmonic and sum-frequency generation in the 0.3547–1.9079 µm range…
Texture effects caused by preferred orientation can be corrected in Rietveld analysis by an alternative algorithm presented in this contribution. This algorithm is equivalent to models using symmetrized linear combinations of spherical harmonic functions, but it is unique to all Laue classes and to all orders. Positiv…
The detailed mechanism of the reversible binding and fast exchange of SO 2 on the organoplatinum(II) complex [PtI(NCN)], 1, has been studied experimentally in solution (C 2 F 4 Br 2 ) using low-temperature NMR spectroscopy and theoretically by ab initio calculations. Direct bonding of SO 2 and formation of the thermod…
Tetracyclines such as chlortetracycline and doxycycline with antimicrobial activity were reported to possess cytostatic and cytotoxic activity against mammalian tumor cells, often at high doses. Non-antimicrobial chemically modified tetracyclines (CMTs), with limited systemic toxicity but with significant tumor cell t…
Size reduction of microcrystalline cellulose (MCC, Avicel PH-101) powder by ball milling was poorly effective, particularly in the presence of sodium lauryl sulphate (SLS), which tended to form a protective foam. Ultrasonic homogenisation of an aqueous suspension more readily produced ultra-fine MCC, even in the prese…
The photoelectric effect was discovered and explained in terms of quantum physics about a hundred years ago. Today, photoemission spectroscopy using vacuum ultraviolet radiation and x-rays is an important tool for studying the electronic properties and atomic structure of solids. This paper reviews the development of…
Ti-doped MoS2 nanotubes are produced by pyrolyzing a H2S/N2 mixture over an oxidized Ti–Mo alloy powder at elevated temperatures. Partial substitution of Mo by Ti does not significantly alter the 2H–MoS2 lattice.
Abstract Free drainage in compressed‐air foams were studied experimentally and theoretically. The time evolution of liquid holdup profiles in a 0.2‐m‐high by 0.29‐m‐diameter foam column was determined at various heights by measuring sonic velocity. A new experimental technique was devised to measure the true drainage…
Equilibrium water absorption behavior of epoxy/carbon fiber composites was investigated under hygrothermal conditions. The temperature dependence of the equilibrium water uptake was quantitatively determined by assuming two distinctly different physical states of bound water and free water. The bound water was viewed…