Materials Literature
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Semi-solid processed 18% Cr and 27% Cr cast irons were produced by using copper cooling plate and metal mold. A series of experiments were carried out to clarify the effect of heat treatment on microstructure, hardness, wear properties, and corrosion characteristics. The results show that 27% Cr alloys possess better…
Ternary compound Ti3SiC2 has been successfully synthesized and concurrently consolidated by sintering green compact of starting powder mixture. 3Ti/SiC/C powder mixture was compacted and heated in vacuum or in Ar atmosphere at temperatures from 1573 to 1773 K for a time period ranged from 2 to 6 hours. It has been fou…
Germanium-doped zinc oxide thin films with Ge content of 0∼8.1 at% were deposited by an RF magnetron sputtering. The electrical and optical properties of the films were investigated. The Ge doping caused the reduction of resistivity of the films, and at about 3% of the Ge content showed the minimum resistivity of abou…
Binary C14 Laves phase alloy CaMg2 is expected to absorb hydrogen more than 6 mass%, when the H/M ratio reaches 2. We have found that the binary CaMg2 did not absorb hydrogen at ambient temperature and hydrogen pressure but Ni added CaMg1.8Ni0.2 which is also C14 Laves phase absorbed 6.0 mass% of hydrogen at room temp…
Siloxane chains of designated lengths can be synthesized with high yields by reacting tris(tert-butoxy)silanol alternately with dichlorosilane and silanediol.
Variation of lattice constants of Ce 1 − x M x O 2 − 0.5 x − δ ( M = Gd , Sm, Y; x = 0 , 0.1, 0.2) with temperature and oxygen ion vacancy concentration was investigated with X-ray diffraction (XRD) at 600-1000°C under various gas atmospheres. Linear thermal expansion and increase of expansion coefficient with trivale…
Cell culture models are useful tools to study the uptake of drugs across the barriers of the human body, like the intestine, the skin or the blood-brain barrier. Cell-based in vitro models not only help to reduce the number of animals used but are also much faster to perform, more cost effective and give more reproduc…
The interdiffusion experiments of Ti-rich β Ti–Al–Cr alloys have been performed in the temperature range from 1273 to 1473 K. The concentration profiles indicate that the diffusion distance of Cr is somewhat longer than that of Al in the solid solutions. The diffusion paths show S-shaped curves. The formation of S-sha…
Approximately 89 million metric t of organic chemicals and lubricants, the majority of which are fossil based, are produced annually in the United States. The development of new industrial bioproducts, for production in standalone facilities or biorefineries, has the potential to reduce our dependence on imported oil…
Hot corrosion of layered machinable ceramic coated with in air at 700-1000°C has been investigated by means of thermogravimetric analysis, X-ray diffraction, Raman spectroscopy, and scanning electron microscopy/energy-dispersive spectroscopy. The hot corrosion of was slight at low temperatures of 700 and 800°C, while…
The formation characteristics of the vertical density profile of MDF are presented herein. Results of laboratory studies indicate that the vertical density profile of MDF is formed from a combination of actions that occur both during compaction and also after the press has reached final position. The methodology, whic…
Dielectric properties of silica filled silicone rubber used for high voltage insulation are studied as a function of frequency (1 mHz - 1 MHz) and temperature 213K - 433K.. Two different polarization mechanisms are identified. The frequency dependence of the dielectric constant and loss factor is well characterised by…
Hydrogen reaction on catalytic surfaces is an important field of research in fuel cell science. The adsorption of hydrogen (deuterium) on Co(0001) and the influence of carbon monoxide and sulphur on the adsorption were studied by XPS, TDS, WF measurements and LEED. The WF increased due to D2 adsorption, revealing the…
Remote-oxyfunctionalization induced by 2,6-dichloropyridine N-oxide (DCP N-oxide) as an oxygen donor and a (5,10,15,20-tetramesitylporphyrinate) ruthenium(II) carbonyl complex (Ru-porphyrin) and HBr as catalysts was examined for a series of methyl ester-peracetylated derivatives of (5 beta)-3-oxobile acids. Using the…
Abstract This International Standard specifies two methods for determining the maximum count rate for an acceptable limit of divergence from linearity of the intensity scale of Auger and x‐ray photoelectron spectrometers. It also includes methods to correct for intensity non‐linearities so that a higher maximum count…
Different approaches to the description of the structure of intermediate chiral smectic C* phases are discussed and the concept of the “discrete” flexoelectric effect is introduced that describes a polarization induced in a smectic layer by a difference in director orientation in the two other layers adjacent to it. I…
Experiments were carried out to investigate in-situ reactions of refractory and its interactions with slag (composition: 45.4%SiO2+36.6%CaO+15.9%Al2O3) using a horizontal furnace by detecting CO and CO2 contents in off gas with an infrared (IR) analyzer. The composition of refractory is 69.4%Al2O3+7.3%SiO2+10.6%SiC+12…
We report on Raman scattering of VO 2 films prepared by radio frequency magnetron sputtering under different conditions. Our investigations revealed that the dominated Raman peaks shift towards high frequency for both V-rich and O-rich VO 2 films, compared with the stoichiometry VO 2 films. The experimental evidence i…
Highly ordered mesoporous materials constructed with integrated polymer-silica hybrid frameworks can be obtained via a one-step synthetic strategy using a mixture of polymer and silicate as the framework sources in the presence of a structure-directing agent.
An ordered structure of [OsL(3)](2+)(L = 2, 2'-bipyridine or 1, 10-phenanthroline) layer in an ultrathin film composed of the complex cations, clay nanosheets and alkylammonium cations is reported on the basis of its in-plane X-ray diffraction and polarized electronic spectral data.