Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
SiC single crystals of 6H polytype were plastically deformed by uniaxial compression at a constant strain rate at temperatures between 1100 and 1800°C, and their critical resolved shear stress τc and strain-rate sensitivity were measured as a function of temperature. The flow rate [ydot] was found to be expressible in…
The strength, fracture toughness, and oxidation behavior of a hot-pressed SiC-TiB/sub 2/ composite (with B and C additions) were investigated. Adding 15 vol% TiB/sub 2/ to an SiC matrix increased the mean strength and mean fracture toughness of the composite by 28% and 45%, respectively. Oxidation of the SiC-15-vol%-T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrientation dynamics of main-chain liquid crystal polymers. 2. Structure and kinetics in a magnetic fieldJ. S. Moore and S. I. StuppCite this: Macromolecules 1987, 20, 2, 282–293Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDual-mode transport of molecular oxygen in a membrane containing a cobalt porphyrin complex as a fixed carrierHiroyuki. Nishide, Manshi. Ohyanagi, Osamu. Okada, and Eishun. TsuchidaCite this: Macromolecules 1987, 20, 2, 417–422Publication Date (Print):February 1, 1987Publica…
We present an analytic solution of the problem of velocity selection in a fully nonlocal model of dendritic crystal growth. Our analysis uses a WKB technique to derive and evaluate a solvability condition for the existence of steady-state needlelike solidification fronts in the limit of small undercooling \ensuremath{…
Aluminum titanate solid solutions with empirical formulas of Al 2 Ti 1‐x Zr x O 5 , Al 6(2‐x)(6+x) Si 6x/(6+x) □ 6x/(6+x) TiO 5 , and Al 2(1‐x) Mg x Ti 1+x O 5 were synthesized by reaction sintering and annealed at 900° to 1300°C in air to evaluate the thermal stability. Substitution of Al in Al 2 TiO 5 by Si and 2Al…
The effects of TiB/sub 2/ addition to ..cap alpha..-SiC on mechanical, thermal, and electrical behavior were determined. The reliability of ceramics for structural applications is, in general, limited by variability in mechanical strength and low toughness. Property variability is normally attributed to processing- or…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharge separation in carotenoporphyrin-quinone triads: synthetic, conformational, and fluorescence lifetime studiesDevens Gust, Thomas A. Moore, Paul A. Liddell, Gregory A. Nemeth, Lewis R. Makings, Ana L. Moore, Donna Barrett, Peter J. Pessiki, Rene V. Bensasson, and Cite t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleAnion-exchanged clay (hydrotalcite-like compounds) modified electrodesKingo Itaya, Hsien Chang Chang, and Isamu UchidaCite this: Inorg. Chem. 1987, 26, 4, 624–626Publication Date (Print):February 25, 1987Publication History Published online1 May 2002Published inissue 25 February…
The surface phases of a nematic liquid in the presence of a smooth substrate are studied using Landau--de Gennes theory. The alignment of the nematic director is restricted to be either parallel or perpendicular to the substrate, although methods of treating more general structures are indicated. We describe extension…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe (phthalocyaninato)copper iodide complex Cu(pc)I: a molecular metal with a one-dimensional array of local moments embedded in a "Fermi sea" of charge carriersMichael Y. Ogawa, Jens Martinsen, Sharon M. Palmer, Judith L. Stanton, Jiro Tanaka, Richard L. Greene, Brian M. Ho…
Chemical reactions require that at least two molecules or reacting groups come into close proximity so that energy, electrical charge, or chemical groups may be exchanged between them. The process of bimolecular reaction between A and B is given by Eq. (1), taking into account the diffusion step bringing the two react…
Abstract We report attempts to create conjugated polymers consisting of alternating phenylene and heterocyclic rings separated by double bonds by means of condensations between terephthalaldehyde and dimethyl nitrogen bases. Because the products precipitated during their formation even at 180°C in N‐methyl‐2‐pyrrolidi…
Abstract It is a requirement for all future nuclear stations in the U.K. that they can be shut down safely in the event of an earthquake. The AGR reactor core structures have been mathematically modelled using non‐linear techniques which are implemented in the three‐dimensional computer code AGRCOR. Experimental verif…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry of iron porphyrins under a carbon monoxide atmosphere. Interactions between carbon monoxide and pyridineC. Swistak and K. M. KadishCite this: Inorg. Chem. 1987, 26, 3, 405–412Publication Date (Print):February 1, 1987Publication History Published online1 May…
Abstract The dissolution kinetics of alumina in aqueous solution was studied in batch and continuous systems. Data were correlated by the kinetic equation C(t) = 1 − exp(− kt α ). The parameter k was a function of temperature and acid concentration, while the parameter α remained constant. The temperature variation of…
Abstract The modification of epoxy resins by means of carbon dioxide is presented. The resulting resins contained different amounts of cyclic carbonates (1,3‐dioxolane‐2‐one rings) instead of a part of epoxy groups. The effect of the cyclic carbonate content on viscosity, gel time, peak exotherms, and crosslinking ext…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal chemistry pathways of substituted anisolesAntti I. Vuori and Johan B-son BredenbergCite this: Ind. Eng. Chem. Res. 1987, 26, 2, 359–365Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inissue 1 February 1987https://pubs…
The dynamics of exciton motion in tetramethylammonium manganese (II) trichloride (TMMC) are investigated in the presence of copper (II) and cobalt (II) traps. Manganese luminescence decay curves are analyzed using several models and at various trap concentrations and temperatures, with the conclusion that trapping doe…
Abstract Between 1981 and 1983, a working Group of USTC‐1.3 of the CIE prepared new recommendations giving for the first time detailed instructions for the calculation of CIE tristimulus values, for inclusion in Publication CIE No. 15.2, a revision of the CIE document on colorimetry first published in 1971. The new re…