Materials Literature
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The failure of warp yarns on a loom is often caused by repeated cyclical elongation at small stresses well below the breaking point applied under static load. The phenom enon, commonly known as fatigue, is caused by the gradually diminishing resistance of the material, attributable to cumulative damage. Generally, the…
The equiaxed solidification of eutectic alloys is modelled by a probablistic method. The volume of the specimen is divided into a regular network of cubic cells and the temperature is assumed to be uniform. The temperature of the specimen is calculated in a time-stepping scheme from a simple heat balance and a knowled…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-temperature kinetics of silicon atom oxidation by nitric oxide based on silicon, nitrogen, and oxygen atom measurementsH. J. Mick, H. Matsui, and P. RothCite this: J. Phys. Chem. 1993, 97, 26, 6839–6842Publication Date (Print):July 1, 1993Publication History Published o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and bonding of pentaaquanitrosylchromium(2+) sulfateMichael Ardon and Shmuel CohenCite this: Inorg. Chem. 1993, 32, 15, 3241–3243Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissue 1 July 1993https://pubs.acs.org/doi…
Abstract Blends of poly(aryl ether ketones) (PAEKs) and an amorphous poly(ether imide) (PEI) were used as model systems to study the broadening of the glass transition due to crystallization and the resulting depletion of PAEK from the amorphous phase. Two different PAEKs were studied, which are completely miscible wi…
Article The Sorption of 210Pb, 210Bi and 210Po on Montmorillonite: A Study with Emphasis on Reversibility Aspects and on the Effect of the Radioactive Decay of Adsorbed Nuclides was published on July 1, 1993 in the journal Radiochimica Acta (volume 62, issue 1-2).
Abstract Polyamide samples were heated under vacuum or mixed in a Brabender plastograph. UV absorbance, chain end concentration, and molecular weight were studied. Postcondensation was observed for polyamide heated under vacuum. For polyamide samples mixed in the plastograph, atmosphere, shear rate, and temperature ch…
The previously reported correlations in indigo dyeing of cotton denim between distribution of indigo in the cross‐section of denim yarn, colour yield and dyebath pH are reviewed. Statistical analysis reveals that even with the experimental uncertainty of the absolute p K a values associated with the ionisation of the…
Abstract A salt of H3PW12O40, Cs2.5H0.5PW12O40, catalyzed efficiently the skeletal isomerization of n-butane to isobutane at 300 °C. The activity and selectivity were much higher than those of SO22−/ZrO2. H-ZSM-5 was more active than Cs2.5H0.5PW12O40, but the selectivity was very low.
Depolarized Rayleigh scattering (DRS) and dielectric spectroscopy (DS) are employed to study the solvent and polymer dynamics in the polystyrene (PS)/toluene system and for PS concentration up to 0.6 g/ml. The DRS measurements were made in the temperature range from 255 to 373 K with different interferometers making p…
The densification of Al 2 O 3 –30TiC (in weight percent) composite is investigated as a function of Y 2 O 3 additions. It is observed that very small amounts of Y 2 O 3 are effective in aiding the densification. The density was observed to pass through a maximum at 0.35 wt% of Y 2 O 3 . The gas‐generating reaction of…
In the past several years, "Shingosen," or new synthetic fibers have been developed in Japan. Polyester fibers and fabrics have attained a new status among other synthetic and natural fibers and textiles, and the Japanese have begun to recognize that recent polyester products are comparable to natural fibers such as s…
Abstract The radical grafting of C n F 2n +1 CH 2 CH 2 SH ( n = 6,8) onto the double bonds of hydroxyl‐terminated liquid polybutadienes (HTPBD) was studied. Various methods for investigating the amount of grafting (titration of residual thiol and fluorine analysis) were used and compared. The nature and the amount of…
The advantage of fast firing depends not only on the finer grain‐size effect at the sintering temperature, but also on the smaller pore‐size effect which results from the restricted pore growth. Pore growth due to the differential sintering during heating was observed to occur at relatively low temperature regions, an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydroxyl radical formation during the reaction of oxygen with methane or water over basic lanthanide oxide catalystsLouis C. Anderson, Mingting Xu, Charles E. Mooney, Michael P. Rosynek, and Jack H. LunsfordCite this: J. Am. Chem. Soc. 1993, 115, 14, 6322–6326Publication Dat…
Results are presented of a systematic finite element (FEM) simulation of power transformer susceptibility to geomagnetically induced currents (GICs). DC saturation patterns for five different transformer core designs are examined using FEM. Magnetic fields along various traverses are provided. Impedance matrix entries…
Sintered magnets of Sm2Fe17Ny nitrides, with a density of 6.0–7.4 g/cm3, have been prepared by using an explosion technique. Both crystalline structure and the magnetic properties of Sm2Fe17Ny nitrides were retained in the process. The sintered magnet had a remanence Br=0.83 T, an intrinsic coercivity μ0iHc=0.57 T and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPotential-dependent conductivity of conducting polymers yields opportunities for molecule-based devices: a microelectrochemical push-pull amplifier based on two different conducting polymer transistorsChristopher H. McCoy and Mark S. WrightonCite this: Chem. Mater. 1993, 5,…
The effect of submicron‐sized particles on the corrosion of copper has been investigated in mixtures at 373 K and relative humidities (RH) of 65, 75, and 88%. At 65% RH, particles do not affect the oxidation of copper. At 75% RH, the "critical relative humidity" of , localized formation of and a basic copper sulfate,…
Supercritical carbon dioxide is known to be a very good swelling agent and plasticiser for poly(methyl methacrylate), a consequence of an interesting combination of liquid-like and gas-like properties exhibited by supercritical fluids. Making use of this behaviour, we have studied a constant temperature process of gen…