Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn explanation for deviations of Fischer-Tropsch products from a Schulz-Flory distributionRonald A. Dictor and Alexis T. BellCite this: Ind. Eng. Chem. Process Des. Dev. 1983, 22, 4, 678–681Publication Date (Print):October 1, 1983Publication History Published online1 May 200…
Abstract The paper describes absolute measurements of the thermal conductivity of aqueous NaCl solutions in the concentration range 0 to 5 molality, the temperature range 0 to 80°C and the pressure range 0.1 to 40 MPa. An apparatus is based on the transient hot‐wire method using coated wire. The accuracy of the experi…
This paper addresses some aspects of low temperature stress corrosion cracking (SCC) in Inconel 600 steam generator tubing, a recent instance of which apparently resulted from the contamination of the primary coolant by sulfur compounds. The low temperature SCC of sensitized Inconel 600 was studied in concentrated and…
The low temperature stress corrosion cracking of sensitized Inconel 600 has been examined using aerated 1.3% boric acid solutions with small additions of sodium thiosulfate. Cracking is observed for thiosulfate concentrations above 10−6 M. The rate of cracking increases with temperature to at least 80 C. Concentrated…
An undergraduated-level text providing an update on theories of strength and practical developments of stronger materials. Attention is also paid to problems with high-performance composite materials, failure analysis, and brittle fracture. Some chapters with problems but no answers. Contents: traditional strength tes…
The microstructural changes which occur during the extrusion of an Al–7Mg alloy have been investigated using optical and electron microscopy. Light microscopy has shown that recrystallized grains are present both at the original grain boundaries and within the grains, even at the breakthrough pressure. Electron micros…
Abstract Solid ‐state polymerization of poly(ethylene terephthalate) (PET) is carried out by heating the low molecular weight prepolymer at temperatures below its melting point but above its glass transition temperature. Postcondensation occurs and the condensation byproducts can be removed by applying vacuum or inert…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic and geometric features of (.eta.5-C5H5)ML 16-electron fragments. A molecular orbital study of ligand effectsPeter Hofmann and Moothetty PadmanabhanCite this: Organometallics 1983, 2, 10, 1273–1284Publication Date (Print):October 1, 1983Publication History Publishe…
Abstract A structure refinement of kaolinite made using the Rietveld neutron profile refinement technique has given non-hydrogen atom positions which were not significantly different from those given by B. B. Zvyagin in 1960. All of the hydrogen atoms have been located; the three inner-surface hydrogen atoms are invol…
The use of steady, normal and oblique shock configurations is explored in calculating the pressure and deformation produced by the impact of a liquid mass on a plane solid surface. Since pressures generated are very large, the change in bulk modulus of the liquid (water) is accounted for by using an equation of state…
A photoelectrochemical method has been developed for etching integral lenses on light-emitting diodes (LED’s). An LED wafer is immersed in an electrolyte and biased at a potential at which the etch rate is directly proportional to light intensity. The image of a photomask is projected onto the surface of the wafer to…
Abstract The crystal structure of kaolinite( P l, a = 5.153(1), b = 8.941 (1), c = 7.403 (1)Å, α = 91.692(3)°, β = 104.860(3)°, γ = 89.822(3)°, specimens from Keokuk geodes) has been refined in detail and that of dickite ( Cc, a = 5.1460(3), b = 8.9376(5), c = 14.4244(6) Å, β = 96.761(5)°) has been re-refined, both fr…
Propionic, n-butyric, isobutyric and phthalic acid esters of (hydroxypropyl)cellulose were prepared and characterized. The aliphatic esters were readily formed by reacting (hydroxypropyl)cellulose with the corresponding acid chloride at room temperature. The phthalic acid ester was formed by reacting phthalic anhydrid…
The relative susceptibilities of Alloy 600 and 690 base metals and I-82 and I-182 weld metals to intergranular stress corrosion cracking (IGSCC) in pure water at 288 C were evaluated. A combination of creviced and noncreviced slow strain rate, smooth sustained load, and precracked fracture mechanics tests were employe…
A relatively new deposition technique involving laser-assisted evaporation is applied to the deposition of thin ZnO films. Highly oriented and crystalline films of ZnO were obtained by CO2 laser evaporation of ZnO powder targets on substrates held at 50–450 °C. Optical transmission spectra of these films show a sharp…
The refractive indices and densities of six liquid crystals—two alkylcyanobiphenyls, three alkoxycyanobiphenyls and one mixture of two alkylcyanobiphenyls have been reported as a function of temperature. The effective polarizabilities αeand αo in the nematic phase calculated using the methods due to Neugebauer, Vuks a…
A technique is presented whereby compressive surface stresses are introduced into transformation‐toughened ZrO 2 ceramics by removing the stabilizing oxides, such as Y 2 O 3 , from the surface. The advantages of this approach over other techniques are discussed, and experimental data confirming the presence of compres…
Abstract Wood fibers from aspen and spruce have been used for filler and reinforcement of polystyrene. The wood fibers used were in the form of refined wood. In order to improve compatibility of wood fibers with polymeric matrices, fibers have been modified by copolymerization with styrene. The kanthate method of graf…
A method for the isolation and purification of pyridinoline from bone collagen was developed, with the use of sulphonated polystyrene resins. The analytical techniques were used to quantify pyridinoline, for which hydroxyallysine is a known precursor, in a wide range of tissues. The structure of pyridinoline proposed…
Gorsky-effect measurements of the diffusion coefficient of tritium (T) in V, Nb and Ta are reported. The measurements were performed at small T concentrations (less than about 1.4 at.%), and in the temperature range from -140 degrees C to 100 degrees C. Comparison with results obtained for H and D shows an increase of…