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。
Experiments have been carried out on a commercial aluminium alloy rolled to foils with various high rolling reductions. Attention was focused on the formation of cells during deformation. Microstructures were examined in the SEM using electron backscatter diffraction (EBSD) and oriented imaging microscopy techniques.…
Phase diagram studies show that at ambient pressure only one ternary oxide, Cu 2 Ln 2 O s , is stable in the ternary systems Cu-Ln-O (Ln = Tb, Dy, Ho, Er, Tm, Yb, Lu) at high temperatures. The crystal structure of Cu 2 Z,rc 2 0 5 can be described as a zig-zag arrangement of one-dimensional Cu 2 O s chains parallel to…
The near-surface atomic composition and the character of chemical bond in two nonevaporable gettering alloys have been investigated via core level (Zr 3d, Fe 2p, V 2p, O 1s, C 1s) photoemission. The samples have been measured in UHV after in-air fracturing and various annealing steps (up to 850 °C). For T>400 °…
The properties of two types of surface OH species, terminal (t) and bridged (b), as well as corresponding vacant sites on ZrO 2 at 573 K have been studied using dimethyl ether (DME) adsorption as an IR molecular probe. On the dehydroxylated ZrO 2 surface, the molecularly adsorbed CH 3 OCH 3 species was dissociated mod…
A eutectic solid of Al 2 O 3 –GdAlO 3 was prepared by arc discharge and crushed to a eutectic powder of 3–125 μm. The powder was consolidated by the spark plasma system (SPS). The consolidated powder duplicated the eutectic structure: Al 2 O 3 and GdAlO 3 were joined to each crystal. There were no flaws such as cracks…
Summary Sulfate scale dissolvers have been applied downhole for many years to remove barium and mixed sulfate scale deposits from the wellbore and from the near-wellbore formation. As well as dissolving mineral scales, these corrosive materials also have the potential to cause some degree of formation damage by the di…
Abstract Adduct complexes of ruthenium(II,III) pivalate dimer with pyridyl nitronyl nitroxide radicals, [Ru2(O2CCMe3)4(L)2]X (L = 2-(3-pyridyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxyl 3-N-oxide (m-nitpy) and 2-(4-pyridyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxyl 3-N-oxide (p-nitpy); X = BF4 an…
The thermal expansion of Al 2 O 3 –MgO castables containing 5.5 wt% MgO and 1.36 wt% CaO and Al 2 O 3 –spinel castables containing 20 wt% spinel having 95 wt% Al 2 O 3 and 1.7 wt% CaO was measured in the temperature range of 800–1650°C by dilatometry. A sharp increase in expansion from around 1425° to 1525°C, followed…
Abstract Block copolymers of polycarbonate (PC) and polymethylmethacrylate (PMMA), PCb‐PMMA, were examined as compatibilizers for blends of PC with styrene‐co‐acrylonitrile (SAN) copolymer. PC‐b‐PMMA was added to blends of PC with SAN containing various amounts of AN. The average diameter of the dispersed particles wa…
α-Ti foil with a protective layer formed on one side was deflected as a result of corrosion in a methanol (CH3OH) solution containing 0.6 mol/L potassium chloride (KCl) because of tensile stresses generated at or near the metal passive film interface. Transmission electron microscopy (TEM) observations showed that the…
Mechanical parameters such as bending rigidity, thickness, compressibility, and coef ficient of friction are measured by a sensory method for a series of plain and rib weft knitted structures made from cashmere and polyester textured yarns. The values estimated by the sensory method are found to be in fairly good agre…
The mechanism of immersion plating of copper on porous silicon is studied. Copper metal is deposited on the surface of porous silicon at a rest potential in aqueous solution. It is shown that presence of chloride ions in copper sulfate solution inhibits the metal deposition, whereas the deposition is possible in cupro…
Microcellular ABS foams are a novel family of materials with the potential to significantly reduce material costs in a number of applications that currently use solid polymer. ABS foams were produced using carbon dioxide in a solid-state process. Solubility and diffusivity of CO 2 in ABS was measured, and the latter w…
Silk fine powder was prepared directly from silk fibers irradiated with an accelerated electron beam (EB). Irradiated silk fibers were well pulverized only by physical crushing using a ball mill without any chemical pretreatment. Silk fibroin fibers were irradiated at ambient temperature in the dose range of 250–1 000…
Abstract The mechanism for the photooxidation of NO over hydrogen plasma-treated TiO2 under visible light irradiation was studied by in situ Fourier transform infrared spectroscopy. It was found that the oxidation of NO over plasma-treated TiO2 under visible light proceeded consecutively as NO → NO2− → NO3−, where the…
ABSTRACT: The kinetics of chlorophyll degradation in pea puree were determined in a specially designed reactor with on‐line pH control capability. Without pH control, the pH of the pea puree decreased continuously with heating due to acid formation; the pH was maintained within ±0.1 of the desired value with on‐line p…
A new azobenzene-containing side-on LC polymer was synthesized. It shows a nematic phase. Its photochemical properties were characterized in solution and in thin film. The N-I phase transition can be induced upon irradiation in the π-π* absorption region of the polymer.
An overview is given on the reduction by X-rays, of Au, Hg, Bl, V, and W metal ions during the XPS analysis of various kinds of samples. The possibility of correlating the ability of the metal ions to undergo X-ray induced reduction with their electrochemical reduction potentials is also highlighted.
Abstract Various linear low‐density polyethylene (LLDPE; density ∼ (0.920 g/cm 3 )) resins that encompass those polymerized using Ziegler‐Natta, metallocene, and chromium oxide based catalysts were blown into film at similar process conditions, and the tensile properties of the resulting films were investigated in rel…
The thermodynamics of cation ordering in the ilmenite-hematite solid solution (FeTiO 3 )x(Fe 2 O 3 )1-x were re-examined in view of a recent in-situ neutron diffraction study of the R3̅ to R3̅ phase transition. A macroscopic thermodynamic model is developed, in which the excess enthalpy of ordering is described by a f…