Materials Literature
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Abstract In an attempt to understand the fatigue crack initiation and growth behavior of planar slip alloys, studies have been carried out in strain control on Cu‐16 at.% A1 single crystals oriented for easy glide. Alloy single crystals of Cu‐16 at.% A1 do not show saturation like copper crystals, but harden slowly an…
Abstract The reactions of an epoxy prepolymer based on bisphenol A diglycidylether (DGEBA) with γ‐aminopropyltriethoxysilane (γ‐APS) are studied. The results of different techniques are compared: size exclusion chromatography, differential scanning calorimetry, chemical titration, and Fourier Transform Infrared absorp…
The conformation of perindoprilat, an antihypertensive drug, is studied in the solid state by X-ray analysis. The resolution of its structure reveals important analogies between its observed conformation and that of several ACE inhibitors of the same family. This comparison points out a constant relative orientation o…
Thin films of Sr0.6Ba0.4Nb2O6 on silicon and fused silica substrates have been prepared by the sol-gel method. The dense, transparent, and crack-free films were fabricated by the dipping and then firing at a temperature of 700 °C. Ferroelectric properties were confirmed by P-E hysteresis loops. The refractive index an…
The experimental results of an investigation of a chemical (alloying) and a physical (deformation) method for refining the microstructure of duplex stainless steels are described. The chemical technique involves alloying with copper. When 3 wt-%Cu is added to a 30Cr–8Ni steel, it was found that the copper precipitatio…
Abstract Poly(methyl methacrylate) (PMMA) is a brittle material which can be reinforced by the incorporation of acrylic particles, which do not spoil the transparency but which considerably increase the toughness of the material. In that study, we have varied the particle size and the outer layer for anchoring with th…
A highly sensitive capacitance-change technique, suitable for thin polymer films, has been developed for the measurement of the coefficient of thermal expansion (CTE) in the film-thickness direction. Using this technique, we have determined the thickness-direction CTE of Kapton polyimide to be about 81±4 ppm/°C, avera…
Abstract The selection of functions to represent XPS lineshapes is discussed. An improved Lorentzian/Gaussian product function is proposed for fitting symmetrical XPS peaks, and a further empirical modification is shown to represent asymmetric (metallic) XPS peak profiles very closely. One additional parameter sets th…
C 24 H 36 O 4 cristallise dans P2 1 2 1 2 1 avec a=7,193, b=15,208, c=19,277 A, Z=4; affinement jusqu'a R=0,049. C 24 H 34 O 4 cristallise dans P2 1 avec a=6,370, b=12,072, c=13,024 A, β=99,87°, Z=2; affinement jusqu'a R=0,040. C 23 H 34 O 5 . CH 3 OH cristallise dans P2 1 2 1 2 1 avec a=16,678, b=13,332, c=10,063 A,…
We have carried out extensive computer simulations of the Lebwohl-Lasher model of a nematic liquid crystal to determine the Frank elastic constant K for this system as a function of temperature. We use equilibrium, k-dependent, fluctuation expressions, valid at small wave vector k, and also measure the response to app…
The damage structures produced in Ni by heavy-ion irradiations with 50 keV Kr+ and 50 and 100keV Ni+ ions have been studied as a function of irradiation temperature (30 and 300K) and ion dose (1015–1017 ions m-2). Both irradiations and electron microscopy were performed in the HVEM-Accelerator facility at Argonne Nati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUV-visible diffuse reflectance spectroscopic study of platinum, palladium, and ruthenium catalysts supported on silicaT. Lopez, M. Villa, and R. GomezCite this: J. Phys. Chem. 1991, 95, 4, 1690–1693Publication Date (Print):February 1, 1991Publication History Published online…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinding of lead(II), antimony(III), and other isoelectronic main-group ions to iridium in the metallomacrocycle Ir2(CO)2Cl2{.mu.-(Ph2PCH2)2AsPh}2Alan L. Balch, Vincent J. Catalano, Mark A. Chatfield, Jeffrey K. Nagle, Marilyn M. Olmstead, and Phillip E. Reedy Jr.Cite this: J…
Shewanella colwelliana, a marine bacterium which grows in association with oysters, has been found to produce an unusual extracellular polymer which mediates irreversible adhesion of the bacterium to surfaces. Production of the polymer was enhanced when the bacterium was grown on marine agar, overlaid with a dialysis…
The efficacy of NaOCl and a mixture of NaOCl and NaBr as biocides at reducing the numbers and metabolic activity of sessile bacteria on carbon steel in a moderately alkaline test medium were evaluated. The polarization resistances, measured by electrochemical impedance spectroscopy (EIS) of the carbon steel coupons, w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphology formation by combined effect of crystallization and phase separation in a binary blend of poly(iε-caprolactone) and polystyrene oligomerShuichi Nojima, Kunihiko Satoh, and Tamaichi AshidaCite this: Macromolecules 1991, 24, 4, 942–947Publication Date (Print):Februa…
Most members of the NaZr 2 P 3 O 12 (NZP) family possess low, near zero, overall thermal expansion coefficients. However, they also exhibit anisotropy of axial thermal expansion. Some compounds have opposite anisotropy; for example, the a parameter of CaZr 4 P 6 O 24 contracts on heating and that of SrZr 4 P 6 O 24 ex…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMercerization of cellulose. 6. Crystal and molecular structure of Na-cellulose IVHisao Nishimura and Anatole SarkoCite this: Macromolecules 1991, 24, 3, 771–778Publication Date (Print):February 1, 1991Publication History Published online1 May 2002Published inissue 1 February…
Abstract not Available.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of octaacetonitriledimolybdenum(II) tetrafluoroborateF. Albert Cotton and Kenneth J. WiesingerCite this: Inorg. Chem. 1991, 30, 4, 871–873Publication Date (Print):February 1, 1991Publication History Published online1 May 2002Published inissue 1…