Materials Literature
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A full classification is given of the Bravais classes of lattices of symmetry groups of incommensurate crystal phases with an internal (additional) dimensionality d lower than four. These Bravais classes form the basis for the derivation of superspace groups needed for the symmetry classification of incommensurate cry…
An X‐ray diffraction technique was used to measure the residual surface stresses on ground surfaces of Al 2 O 3 /ZrO 2 (tetragonal) composites. To accomplish this, it was necessary to use a radiation for which the penetration depth was small (large wavelength), e.g. CrKα radiation. It was found that these materials co…
Plasma polymers were deposited from a number of methylsilazane and methylsiloxane monomers of linear and cyclic structure. The oligomeric phase evolved from the polymers by a mild thermal treatment was analyzed using gas chromatography/mass spectrometry combined techniques. The oligomeric phase was found to be compose…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of octachloroditungstate(4-) and several of its derivativesRichard R. Schrock, Lynda G. Sturgeoff, and Paul R. SharpCite this: Inorg. Chem. 1983, 22, 20, 2801–2806Publication Date (Print):September 1, 1983Publication History Published online1 May 2002Published in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of nitric oxide decomposition on silica-supported rhodiumArthur A. Chin and Alexis T. BellCite this: J. Phys. Chem. 1983, 87, 19, 3700–3706Publication Date (Print):September 1, 1983Publication History Published online1 May 2002Published inissue 1 September 1983https…
We present a detailed analysis of anharmonic effects on the viscous and elastic properties of various systems with one-dimensional order. We show that the nonlinear coupling of the velocity field to thermally excited undulation modes causes four of the five viscosities in these uniaxial systems (including one, ${\ensu…
The energy loss per cycle has been measured as function of frequency from 0 to 80 Hz in low-carbon lamination steel. Under sine flux excitation, the loss per cycle is linear with frequency, as predicted by simple models but unlike measured results on oriented silicon-iron. Numerical calculations based on a modificatio…
ABSTRACT The development of the mucilage on the outer surface of Navicula confervacea (Kütz.) Grun., a raphed, filamentous diatom, was studied with scanning electron microscopy. This nonstructural cell wall material, present on the surface after critical‐point drying and absent after acid cleaning, was of two types: s…
A new statistical theory of domain wall pinning by a random array of inhomogeneities is outlined. Each pin site is characterized by its maximum pinning force f. The critical field Horequired to unpin a 180° wall, in the absence of thermal activation, is found to be proportional to f2ρ/γ where ρ is the volume density o…
Abstract In an effort to elucidate the structure of the low‐temperature phase of PTFE, a spectroscopic study of the effect of progressive irradiation on the low‐frequency infrared spectrum was undertaken. Previous infrared and Raman measurements indicated that irradiation of PTFE decreases its crystalline content, res…
ABSTRACT Three species of Navicula are described from light and scanning electron microscopy. Navicula bottnica Grunow, has not previously been illustrated at the SEM level, nor has it previously been reported to form colonies, but the cells appear to be identical to Schizonema smithii C. Agardh (sensu van Heurck) and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDevelopment of a new hybrid material (ARALL) for aircraft structuresLaurens B. VogelesangCite this: Ind. Eng. Chem. Prod. Res. Dev. 1983, 22, 3, 492–496Publication Date (Print):September 1, 1983Publication History Published online1 May 2002Published inissue 1 September 1983h…
Abstract The reaction kinetics and physical transport processes governing the thermal dehydration of solid K 2 CO 3 ·3/2H 2 O particles were investigated. Isothermal reaction rate data were gathered using a thermogravimetric balance in which narrowly‐sized K 2 CO 3 ·3/2H 2 O crystals were dehydrated under a water vapo…
Book Review| Online September 01 1983 Manual on Management of the Burn Patient Manual on Management of the Burn Patient. , Maude H. Malick, OTR, Judith A. Carr, OTR. Harmarville Rehabilitation Center, Educational Resource Division, Guys Run Road, Pittsburgh, PA 15238, 268 pp ( 1982), $23.00 (paperback). Susan R. Helin…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation D. J. Plazek, In-Chul Choy, F. N. Kelley, E. von Meerwali, Long-Ji Su; Viscoelasticity and Tearing Energy o…
Synroc‐D is a polyphase nuclear waste ceramic optimally consisting of zirconolite, perovskite, an ulvospinel‐rich solid solution, a hercynitic spinel solid solution, and nepheline. A continuous intergranular glass phase is also present, which may aid in densification, but decreases the waste form's durability in aqueo…
Abstract Measurements of water desorption and sorption on four Ca-saturated illitic clays show that the shapes of the isotherms are very similar to those for other oxide surfaces, indicating that the formation of water multilayers is quantitatively similar. This enables graphs of multilayer thickness against mass sorb…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and decomposition of E- and Z-3,3,5-trisubstituted 1,2-dioxolanesMasaya Yoshida, Masahiro Miura, Masatomo Nojima, and Shigekazu KusabayashiCite this: J. Am. Chem. Soc. 1983, 105, 20, 6279–6285Publication Date (Print):September 1, 1983Publication History Published o…
Using SEM techniques, magnetic domains have been studied in amorphous ribbons of Co70.3Fe4.7Si15B10annealed to produce different values of transverse anisotropy constant Ku. The average domain width varied as Ku-1/6, in agreement with theoretical models incorporating the μ-effect. Domains were also studied in ribbons…
As part of the National Reduced Enrichment Research and Test Reactor Program, Argonne National Laboratory (ANL) is engaged in a fuel alloy development project. The reduction of the 235U enrichment from above 90% to below 20% for such fuels would lessen the risk of diversion of the fuel for nonpeaceful uses. Fuel alloy…