Materials Literature
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Characteristics of air-jet textured yarns are determined by the instability, linear density, and strength, together with structural properties such as loop size, loop frequency, and degree of entanglement. Such characteristics are affected by various process parameters and supply yarn properties. The effects of these…
The purpose of this study was to establish a flexible and economical system for designing well-fitting body contouring apparel with knitted elastomeric fabrics. The methods used consisted of a simple fabric test which measured the stretchability of elastomeric fabrics and then expressed their stretchability as a perce…
but the results suggest that other mechanisms may also be involved. All four amphiboles exhibited systematically higher ferric-ferrous ratios with increasing 6, of equilibration. Equilibrium R values were achieved relatively rapidly and could be readily restored to onginal values by treatment at the appropriate buffer…
A selection of furnace black carbons of varying surface area and industry type were heat treated in purified helium at 2700°C and the corrosion resistance was measured under conditions of oxygen evolution in 30% at 55°C. The extent of graphitization was determined qualitatively by x‐ray diffraction and by transmission…
The forced‐convective dissolution of sapphire into CaO‐MgO‐Al 2 O 3 ‐SiO 2 melts was investigated at 1450° and 1550°C. Spinel, MgAl 2 O 4 , formed on the sapphire under all conditions although the morphology of the spinel, which varied from individual particles to a complete layer, depended on the MgO content of the m…
Abstract Raman spectra were obtained from PdO, Rh 2 O 3 and PdRhO 2 thin films formed by oxidizing foil samples. Polarization measurements allow symmetry species assignments to be made for the lines from the corundum phase of Rh 2 O 3 and from PdRhO 2 , which has a delafossite structure.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of inorganic powders by time-wavelength resolved luminescence spectroscopyEdgar F. Paski and M. W. BladesCite this: Anal. Chem. 1988, 60, 11, 1224–1230Publication Date (Print):June 1, 1988Publication History Published online1 May 2002Published inissue 1 June 1988htt…
The interactions of very pure and practically 100% dense α‐SiC with nickel and iron at 850°C were investigated. Large reaction zones, consisting of carbon and silicides of Ni and Fe, were examined by microprobe analysis. By means of marker experiments, the diffusion mechanisms were investigated: only Ni and Fe migrate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpecular reflectivity of neutrons by thin polymer filmsT. P. Russell, A. Karim, A. Mansour, and G. P. FelcherCite this: Macromolecules 1988, 21, 6, 1890–1893Publication Date (Print):June 1, 1988Publication History Published online1 May 2002Published inissue 1 June 1988https:…
The blocking of dislocations at a slip barrier, such as a grain boundary, is modelled by considering, in the domain of distribution of dislocations ahead of the slip band, a small zone representing a locked source or the width of the boundary itself. The ‘friction stress’ in this small zone is calculated so that no in…
Tensile specimens of type 316L stainless steel with a grain size of 5.0 μm have been deformed at a constant strain rate of 10−3 s−1 over the temperature range 21–900°C and by differential strain-rate test technique over strain rates from about 10−5 to 10−3 s−1 at temperatures in the range 750–900°C. The normalized yie…
A computer study of rectified diffusion was made over the biomedical frequency range (1-10 MHz). Solutions of the Gilmore-Akulichev [E. Cramer, in Cavitation and Inhomogeneities in Underwater Acoustics, edited by W. Lauterborn (Springer, New York, 1980), pp. 54-63] formulation for bubble dynamics were combined with th…
Abstract In vibration welding of thermoplastics, frictional work done by vibrating two parts under pressure, along their common interface, is used to generate heat to effect a weld. The main process parameters in vibration welding are the weld frequency, the amplitude of the vibratory motion, the weld pressure, and th…
The acoustic cavitation threshold of an aqueous solution has been measured at megahertz frequencies as a function of pulse width and pulse repetition frequency for various combinations of these quantities. The fluid tested was a 0.1M KOH-H3BO3 buffer solution with pH 10.9, which contained luminol, was saturated with a…
Abstract Clay mineral abundances and illite-smectite (I/S) compositions have been determined by X-ray diffraction (XRD) in shales of Permo-Triassic to Quaternary age from seven wells in the Viking Graben and Moray Firth. Chemical analyses of size fractions provide evidence that diagenetic illitization of smectite has…
Abstract Six standard polytypes of micas exist that have c-periodicities between 1 and 6 layers; these can be subdivided into groups A and B according to whether the octahedral cations are in the same set of positions in every layer or alternate regularly between I and II possible sets of positions (alternate slant di…
The effect of urotropine, homopiperazine, and n-decylamine on the corrosion of pure iron in deaerated and aerated 0.1 M Na2SO4 solution, with a pH value 2, at 25 C, was investigated by polarization techniques and measurements of the double layer capacitance using the single pulse method. It was found that urotropine a…
Crack growth resistance curves ( R curves) for the growth of surface cracks have been measured in a series of magnesia‐partially‐stabilized zirconia ceramics with varying degrees of transformation toughening. The shapes of the R curves are correlated with strength‐toughness relations and the predictions of fracture me…
Abstract On the basis of neutron diffraction studies, the two inner-hydroxyl ions in highly ordered kaolinite were recently shown to be differently oriented. One of the inner-hydroxyl ions points generally toward a hole in the octahedral sheet and the other toward a hole in the tetrahedral sheet. These orientations an…
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