Materials Literature
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Abstract High-resolution transmission electron microscopy (HRTEM) has been used to examine illite/smectite from the Mancos Shale; rectorite from Garland County, Arkansas; illite from Silver Hill, Montana; Na-smectite from Crook County, Wyoming; corrensite from Packwood, Washington; and diagenetic chlorite from the Tus…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex formation of polyethylenimine with sodium triflate and conductivity behavior of the complexesC. S. Harris, D. F. Shriver, and M. A. RatnerCite this: Macromolecules 1986, 19, 4, 987–989Publication Date (Print):April 1, 1986Publication History Published online1 May 200…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal vapor synthesis of a novel triple-decker sandwich complex: (.eta.6-mesitylene)2(.mu.-.eta.6:.eta.6-mesitylene)Cr2William M. LamannaCite this: J. Am. Chem. Soc. 1986, 108, 8, 2096–2097Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Pu…
Growth of the nonsulfate-reducing marine bacterium Vibrio natriegens increased the corrosion current density (CD) of AISI 304 stainless steel (SS) coupons when grown in a marine medium. The corrosion rate, estimated as the corrosion CD (Icorr), calculated from the Tafel constants and polarization resistance, increased…
Microlite, rangrng from crystalline to metamict, is a principal accessory in several lithologic units of the Harding pegmatite, Taos County, New Mexico. From the sequence of lithologic units within the pegmatite, crystallization of microlite from the pegmatite magma is inferred to have begun relatively late, after the…
A preliminary investigation, using 29Si magic-angle spinning nuclear magnetic resonance spectroscopy (MAS NMR), of the effect of water content on the spinlattice relaxation time, T 1, and Si‒O‒Si bond-angle distribution of vitreous silica is reported. The decrease in T 1 with increase in water content suggests that wa…
Systematic investigations of the temperature dependences of the d.c. and microwave conductivity of polyacetylene doped with various species are reported. These results are discussed within a model where the measured quantities are a superposition of different conduction mechanisms. At low dopant concentrations carrier…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition of silaneMark S. Gordon, David R. Gano, J. Stephen. Binkley, and Michael J. FrischCite this: J. Am. Chem. Soc. 1986, 108, 9, 2191–2195Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https…
An alignment method for materials with cholesteric to smectic C* phase transitions is described. Ordering of the molecules, confined between glass plates which have been coated with a polymer and buffed, is achieved using an electric field. While the buffing direction defines the orientation of the long axis of the mo…
Selection of steady needle crystals in the full nonlocal symmetric model of dendritic growth is considered. The diffusion equation and associated kinematic and thermodynamic boundary conditions are recast into a nonlinear integral equation which is solved numerically. For the range of P\'eclet numbers and capillarity…
Thin paraffin sections, mounted on scanning specimen holders previously coated with polyester film tape (Minnesota Mining and MFG Co., Scotch film tape No. 850 gold), were processed for light microscopy (LM) in the conventional way, then covered with celloxin shellac and examined in the LM by using the upper illuminat…
Fast neutron irradiation to total fluences ranging from 7.7 × 1021 to 5.7 × 1022 n/cm2 (3 to 16 dpa) resulted in a 65% increase in yield strength and a fourfold reduction in ductility. Intergranular fracture was the dominant failure mode for the irradiated material, whereas equal amounts of intergranular and trans-gra…
Abstract Glass transition temperatures have been determined for polystyrenes crosslinked with 1–10% divinylbenzene and swollen with toluene, chloroform, N , N ‐dimethylformamide, and tetrahydrofuran to as high as 0.7 weight fraction solvent. The T g ′s depend approximately on the weight fractions and the T g ′s of the…
The occurrence and ecology of two poorly known planktonic diatoms, Melosira distans var. tenella (Nyg.) M.‐B. Florin and Eunotia zasuminensis (Cabejsz.) Körner in central Finland is discussed. Both species have their maximum in late summer when water temperature is > 15°C and they prefer slightly acid water (pH <…
Densities >99% of theoretical were obtained with stabilized ZrO2 additions to Si3N4. Material sintered at 2140°C under 2.5 MPa nitrogen overpressure with 3.8, 9.9, and 13.4 wt% ZrO2 had a predominantly equiaxed grain size ranging from 0.2 to 7.0 μm. At 1370°C, the latter composition exhibited a flexural strength of ≅4…
Upon rapid thermal decomposition of GeI2—an important reaction for the chemical transport of germanium—the metastable subiodide Ge4.06I, a semiconductor with a clathrate structure, is formed. The clathrate framework is made up of Ge and I3+, and I− ions are present in the cavities: [Ge46-8/3I8/3]I8·Ge4.06I forms dendr…
The number-average molecular weights (Mn) and weight-average molecular weights (Mw) for proanthocyanidin polymers (condensed tannins) have been measured by vapour pressure osmometry and low-angle laser light-scattering measurements in methanol. These confirm earlier findings (based on gel permeation chromatography of…
The present paper is concerned with the modelling of creep and creep damage in polycrystalline metals and the experimental evaluation of the proposed model. By ascribing the reduction of creep rates caused by the principal stress rotation (i.e., cross-hardening) to the intersection mechanism of dislocations on active…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrelation of electron-transfer rate constants of carbanions with their oxidation potentials and basicitiesFrederick G. Bordwell and Mark J. BauschCite this: J. Am. Chem. Soc. 1986, 108, 8, 1985–1988Publication Date (Print):April 1, 1986Publication History Published online1…
The pressure dependence of the Raman bands of NaHCOO has been studied at 298 K and three different phases were identified up to pressures of 30 kbar. Phase II is the one stable at ambient conditions, and when heated to 500 K at ambient pressures it undergoes a transition to phase I. This transition has also been studi…