Materials Literature
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Fully stabilized cubic ZrO 2 single crystals containing various Y 2 O 3 concentrations were deformed at 1400°C in air. The orientation chosen favored (001)(110) slip, which was confirmed by slip‐trace analysis and transmission electron microscopy; (111)(110) slip could also be activated. The yield and flow stresses in…
The microstructure and the mechanical properties of hot‐pressed tetragonal ZrO 2 polycrystals (TZP) reinforced with up to 30 vol% SiC whiskers were studied. The SiC whisker‐TZP composites were stable under the hot‐pressing conditions at 1450°C. Annealing in an oxidizing atmosphere at ∼1000°C resulted in glass formatio…
Abstract Thermal analysis is used to elucidate the fusion of fractions of poly(ethylene oxide) of from 3500 to 5000000 molecular weight. In addition, the equilibrium and nonequilibrium phase diagrams of binary mixtures of these fractions have been studied. Complete segregation from high‐molecular‐weight polymer is pos…
Preliminary results of a theoretical study of lattice defects in cubic zirconia are presented.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect SIMS observation of methylidyne, methylene, and methyl intermediates on a nickel(III) methanation catalystMark P. Kaminsky, Nicholas. Winograd, Gregory L. Geoffroy, and M. Albert. VanniceCite this: J. Am. Chem. Soc. 1986, 108, 6, 1315–1316Publication Date (Print):Marc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the degradation of electrical conductivity in polypyrroleLynne A. Samuelson and Mark A. DruyCite this: Macromolecules 1986, 19, 3, 824–828Publication Date (Print):March 1, 1986Publication History Published online1 May 2002Published inissue 1 March 1986https://pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-valent iron porphyrins: synthesis, x-ray structures, .pi.-cation radical formulation, and notable magnetic properties of chloro(meso-tetraphenylporphinato)iron(III) hexachloroantimonate and bis(perchlorato)(meso-tetraphenylporphinato)iron(III)Pierre. Gans, Georges. Buis…
Mechanisms of failure in a transformation‐toughened MgO‐partially‐stabiltzed ZrO 2 are identified using in situ observations. The observations are related to measured stress‐strain curves, strengths under various loading conditions, strength degradation from surface damage, and comparative strengths and toughnesses of…
Transformation plasticity in ZrO 2 ‐containing ceramics generally exhibits shear and dilatation effects of comparable magnitude. The coupling between external stresses and crystallographic strains assists the tetragonal‐monoclinic transformation, which, via shear localization, gives rise to macroscopic shear and dilat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR of chromium(3+) in tris(acetylacetonato)gallium(III) single crystalsG. Elbers, S. Remme, and G. LehmannCite this: Inorg. Chem. 1986, 25, 7, 896–897Publication Date (Print):March 1, 1986Publication History Published online1 May 2002Published inissue 1 March 1986https://pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalyst deactivation in acetylene hydrochlorinationJ. B. Agnew and H. S. ShankarCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 1, 19–22Publication Date (Print):March 1, 1986Publication History Published online1 May 2002Published inissue 1 March 1986https://pubs.acs.or…
Landau theory is used to examine the wetting behavior of systems with a two-component order parameter. First order and continuous transitions are found. The wetting exponents are shown to be nonuniversal and depend, in certain regions, continuously on the parameters of the problem. Generalization to more components is…
The paper describes and discusses the results of the observations made on the optical textures exhibited by sixteen naturally occurring oils and fats of plant origin. The textures observed here consist of spherulites, drops, batonnets and maltese crosses which are characteristic of liquid crystals. The refractive indi…
Abstract Lake Poukawa, a shallow hardwater lake, is situated on calcareous lake silt overlying peat and alluvium. Two tephra layers, Taupo Pumice and Waimihia Lapilli, aged c. 2000 and 3500 calendar years respectively, were present in four cores (c. 6 m long) of the lake sediment. The diatom flora of the cores was stu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic isomerization of water-soluble quadricyclane to norbornadiene derivatives induced by cobalt-porphyrin complexesKazuhiro Maruyama and Hitoshi TamiakiCite this: J. Org. Chem. 1986, 51, 5, 602–606Publication Date (Print):March 1, 1986Publication History Published onli…
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Oriented samples of Al 2 O 3 ‐ZrO 2 (Y 2 O 3 ) eutectics consisting of an alumina matrix with zirconia dispersoids were grown by directional solidification. Preferred growth directions and epitaxial relations were determined from X‐ray and electron diffraction analyses. Imaging of interfaces was performed by high‐reso…
The thermal conductivity, over the entire temperature range, of insulators and semiconductors is discussed, starting with the concept of a phonon and a description of the various phonon scattering mechanisms. Graphs of experimental data are used to illustrate the effects of these scattering mechanisms on the conductiv…
<div class="htmlview paragraph">The ceramic insert concept far an uncooled, DI diesel engine was evaluated. Small improvements in fuel consumption were projected for this engine relative to a ceramic coated engine. A PSZ cylinder head plate, lip insert in the piston and above-the-rings cylinder liner operated su…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGouterman's "four-orbital" model and the MCD spectra of high-symmetry metalloporphyrinsA. Ceulemans, W. Oldenhof, C. Gorller-Walrand, and L. G. VanquickenborneCite this: J. Am. Chem. Soc. 1986, 108, 6, 1155–1163Publication Date (Print):March 1, 1986Publication History Publis…