Materials Literature
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Alumina‐glass composites were prepared by a melt‐infiltration process that is similar to a fabrication method for dental crowns and bridges. Cylindrical alumina samples with green densities ranging from 62% to 72% of theoretical were formed by slip casting followed by sintering at 1100°C for 2 h. A borosilicate glass…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid-crystalline characteristics of site-selectively-modified chitosanDeeleep K. Rout, Satish K. Pulapura, and Richard A. GrossCite this: Macromolecules 1993, 26, 22, 5999–6006Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published i…
The crystal structure of metastable tetragonal zirconia prepared by the alkoxide method without any dopant has been examined by neutron diffraction at room temperature. The lattice parameters of this sample were a = 0.3591 ± 0.0001 nm and c = 0.5169 ± 0.0001 nm. The oxygen ions are shifted from their lattice sites in…
The corrosive wear behavior of high-alloy stainless steels (SS) under sliding conditions was investigated in 20 wt% sulfuric acid (H2SO4) solution. Experiments showed a negative shift of the corrosion potential, positive shift of critical passivation potential, and steady passivation potential could be regarded as acc…
The nature of the glass transition process in six monohydroxy alcohols, viz., the isomers of butanol, 2-propanol, and 3-methyl–1-butanol had been studied in detail using dielectric spectroscopy (frequency range 10+6–10−3 Hz) and differential scanning calorimetry (DSC). Measurements were made down to a temperature of 7…
A study has been done on the crystallographic effects of under-metal planes on Al(111) orientation in layered Al interconnects (Al/Ti, Al/TiN/Ti), and the dominant factor for electromigration was clarified in the region below a half-micron line width. It was found that Al(111) preferred orientation is strongly depende…
To understand the effect of Mo‐Nb additions on the electrochemical behavior of β‐titanium alloys in ambient temperature chloride solutions, characterization of the electrochemistry and passivity of a Ti‐15Mo‐3Nb‐3Al alloy (β‐21S) was undertaken. Both solution heat‐treated (SHT) and peak‐aged (PA) alloys exhibited pass…
An empirically derived formula, which can be used to predict the average residual reflection that can be expected from an antireflection (AR) coating design as a function of bandwidth, overall thickness, available indices of the coating materials, number of layers, etc., is presented. This formula can be a useful tool…
The reliable preparation of microporous membranes capable of molecular‐size exclusion requires the availability of stable microporous and uniform inorganic oxides with a monomodal and narrow pore‐size distribution and a pore diameter maximum below 1 nm. A new method of pore‐size analysis is presented and the optimizat…
The flow of a periodic suspension of two-dimensional viscous drops in a closed channel that is bounded by two parallel plane walls executing relative motion is studied numerically using the method of interfacial dynamics. Ordered suspensions where at the initial instant the drops are arranged in several layers on a he…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreferential intercalation of isomers of naphthalenecarboxylate ions into the interlayer of layered double hydroxidesHideyuki Tagaya, Shigemitsu Sato, Hiroyuki Morioka, Junichi Kadokawa, Masa Karasu, and Koji ChibaCite this: Chem. Mater. 1993, 5, 10, 1431–1433Publication Dat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and photoexcited-state dynamics of aromatic group-bridged carotenoid-porphyrin dyads and carotenoid-porphyrin-pyromellitimide triadsAtsuhiro Osuka, Hiroko Yamada, Kazuhiro Maruyama, Noboru Mataga, Tsuyoshi Asahi, Masaya Ohkouchi, Tadashi Okada, Iwao Yamazaki, and Y…
Creatinase (creatine amidinohydrolase, EC 3.5.3.3) from Pseudomonas putida is a homodimer of 45 kDa subunit molecular mass, the three-dimensional structure of which is known at 1.9 A resolution. Three point mutants, A109V, V355M, and V182I, as well as one double mutant combining A109V and V355M, and the triple mutant…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Halogenated volatile organic compounds are associated with a broad range of industrial processes, but when discharged into the atmosphere they constitute a major source of air pollution. Recognition of the potentially damaging effects that these emissions can have on the environment is leading to increasing demands fo…
Static and dynamic Debye-Waller factors for the Zr(Y)-O shell and the Zr(Y)-Zr(Y) shell have been determined for four zirconia polymorphs from 10 K to room temperature. The apparent Einstein frequencies for cation-O vibrations and the Debye frequencies for cation-cation vibrations have also been obtained from the anal…
The tensile creep and creep strain recovery behavior of 0° and 0°/90° Nicalon‐fiber/calcium aluminosilicate matrix composites was investigated at 1200°C in high‐purity argon. For the 0° composite, the 100‐h creep rate ranged from approximately 4.6 × 10 −9 s −1 at 60 MPa to 2.2 × 10 −8 s −1 at 200 MPa. At 60 MPa, the c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibria and kinetics of the reactions between hydrogen peroxide and methyltrioxorhenium in aqueous perchloric acid solutionsShigekazu Yamazaki, James H. Espenson, and Patrick HustonCite this: Inorg. Chem. 1993, 32, 22, 4683–4687Publication Date (Print):October 1, 1993Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of the disorder occurring in the crystal structure of syndiotactic polypropyleneFinizia Auriemma, Claudio De Rosa, and Paolo CorradiniCite this: Macromolecules 1993, 26, 21, 5719–5725Publication Date (Print):October 1, 1993Publication History Published online1 May 2…
We utilize a chemical‐kinetics‐based model to describe the rate of crack extension in vitreous silica as a function of the applied stress and the presence of reactive species. Our approach builds upon previous fracture models that treat the atomic bond rupture process at the crack tip as a stressenhanced hydrolysis re…