Materials Literature
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A recently proposed model for interstellar grains (Duley, Jones & Williams) in which the extinction arises from small (radius, a≲ 100 Å) silicate cores with mantles (30–50 Å thick) of hydrogenated amorphous carbon (HAC or α-C:H), and large, but thinly coated, silicate grains (a∼0.05−0.25 μm) can successfully explain m…
Silicon carbide test bars were made by a simple wet‐processing technique. The pressure casting method used the same equipment as conventional dry‐pressing, but with a modified die. This casting technique was employed in order to produce test bars with improved strength and smaller fracture flaws than produced by dry‐p…
An electrochemically formed polyazulene(PAz), one of the electroconductive polycyclic hydrocarbons, was studied for its electrochemical properties in order to examine the possibility of utilizing it as a cathode active material of rechargeable lithium battery. The electrode kinetics of PAz film electrode, especially t…
Waste and scraps, from polyurethane elastomers, mainly from the shoe sole production, can be conveniently converted by a transesterification process into polyols which can be reused in the production of rigid foams, with both economical and ecological advantages. In the transesterification process, secondary reactions…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of boron on molybdenum(100) and its effect on chemisorption of carbon monoxide, ethene, propene, and 3,3,3-trifluoropropeneT. B. Fryberger, J. L. Grant, and P. C. StairCite this: Langmuir 1987, 3, 6, 1015–1025Publication Date (Print):November 1, 1987Publication Hi…
Abstract Die bisher nur aus Pulverdaten bekannten Strukturen der Verbindungen FeAs 2 (Löllingit) und RuTe 2 (Pyrit) wurden anhand von Einkristalldaten neu bestimmt. Die Darstellung der FeAs 2 ‐Einkristalle (Kantenlänge bis zu 6 mm) erfolgte durch Gasphasentransport mit Iod, die Einkristalle des RuTe 2 wurden aus einer…
Methods of surface preparation of steel for adhesive bonding are reviewed. With advanced adhesives, joints of unprepared oily steel can prove very strong, but for durability in adverse environments one must remove all contamination and provide a new, chemically active surface of high surface energy. Degreasing, organi…
Abstract Results are reported of optical transmission experiments on the spinel NiAl 2 O 4 that have been made at temperatures up to 1400°C. The spectra are discussed, and analyzed in relation to the temperature dependence of the distribution of cations on the two cation sublattices. The kinetics of cation sublattice…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopy for corrosion studiesK. Asami and K. HashimotoCite this: Langmuir 1987, 3, 6, 897–904Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Published inissue 1 November 1987https://pubs.acs.org/doi/10.1021/la00…
Phosphorus fractionation and analyses for free oxides of Fe, Al and Si were carried out on depth interval samples taken from a sandy soil chronosequence on the west coast of Vancouver Island, British Columbia. The seven profiles sampled ranged in age from 127 yr at Site 1 to 550 yr at Site 7. Calcium-bound phosphate (…
Scale Inhibitor Precipitation Squeeze For Non-Carbonate Reservoirs B.L. Carlberg B.L. Carlberg Conoco Search for other works by this author on: This Site Google Scholar Paper presented at the SPE Production Technology Symposium, Lubbock, Texas, November 1987. Paper Number: SPE-17008-MS https://doi.org/10.2118/17008-MS…
Abstract In this paper we discuss PP‐PB blends in which both components are highly crystallizable. It was our intention to try to prepare homogeneous PP‐PB blends, assuming miscibility in the melt, by using the ultraquenching technique and to study the properties of the resulting blends following crystallization from…
Regions adjacent to Σ = 9 and Σ = 25 boundaries in silicon bicrystals are found to be in an advanced stage of hardening. Electron microscopy shows multiple slip, cross-slip, network formation and some transmission of slip across the boundary.
Abstract Poly(ethylene terephthalate) (PET) offers good properties as a material of choice for various packaging, electronic, and other applications. In these applications in general, the PET articles achieve improved toughness and other physical properties through molecular orientation resulting from stretching at te…
Abstract The clay mineralogy of Coastal Plain soils with sandy epipedons was studied with respect to taxonomic class, horizon, and the presence or absence of sand grain coatings. Relative estimates of claysized minerals were based on x‐ray diffraction peak height ratios after calibration with standards and normalizati…
The effect of agglomerate strength on sintered density, was determined for several yttria powders made by intentionally agglomerating 0.1‐μm, monodisperse yttrium hydroxycarbonate precursor spheres and calcining separate portions of the precursor at different temperatures to vary the strength of the intraagglomerate b…
The validity of the Sayre equation [Sayre (1952). Acta Cryst. 5, 60-65] for (3 + n)-dimensional periodic structures is examined. A practical procedure is proposed for the determination of incommensurate modulated structures; this is an extension of the direct method previously proposed for solving superstructures [Fan…
The temperature dependence of the solubility of proton defects in SrTiO 3 single crystals was investigated by IR spectroscopy. Based on the integrated absorption of the OH stretching vibration bands, the enthalpies of the dissolution reaction were determined for undoped and Fe-doped SrTiO 3 . In contrast to undoped Sr…
We show that a dislocation-loop theory of the smectic-A--nematic transition predicts the existence of both nematic regions surrounded by smectic regions and a smectic--${A}_{1}$-${A}_{d}$ critical point in the phase diagram, in agreement with recent observations. Fluctuation-corrected mean-field theory leads to a rema…
The phase diagram of growing crystal patterns for succinonitrile is obtained experimentally in a supercooling-anisotropy phase space. The anisotropy of the crystal growth is changed by roughening the upper surface of the bottom plate of the thin crystal-growth cell. Various growing modes are observed, and the relation…