Materials Literature
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Abstract A variety of different morphologies, and therefore mechanical properties, can be obtained from a single rubber‐modified epoxy formulation. The volume fraction, domain size, and the number of particles of phase‐separated rubber are determined by the competing effects of incompatibility, rate of nucleation and…
The emission intensities in the range of 2000–8000 Å of CF, CF2, O, F, CO, CO+, and CO2 produced in CF4/O2 radio-frequency discharges, operated at 1 Torr of pressure and 50 W of power input, have been used to follow the etching process of Si and SiO2, as a function of the CF4/O2 feed composition. The addition of small…
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Asymptotic distributions are obtained for both the strength and the time to failure of a fibrous material for which mild bonding or friction exists between fibers. The analysis is based on the chain-of-bundles probability model, and equal load sharing is assumed for the nonfailed fiber elements in each bundle. Asympto…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas-phase oxidation catalysis by transition-metal cationsManfred M. Kappes and Ralph H. StaleyCite this: J. Am. Chem. Soc. 1981, 103, 5, 1286–1287Publication Date (Print):March 1, 1981Publication History Published online1 May 2002Published inissue 1 March 1981https://pubs.ac…
The magnetic structure of small NiFe2O4 particles has been investigated. Samples (in the few hundred angstrom size range and up) were prepared by chemical precipitation followed by a heat treatment at relatively low temperatures. Mössbauer spectra of the 57Fe nuclei, obtained with a longitudinal magnetic field applied…
Summary Scanning electron micrographs show that the reaction products of solution phosphate and calcite are hemispherical, coral‐like growths on calcite surfaces. Electron probe micro‐analysis indicates that these are a calcium phosphate, and solution data plotted against solubility isotherms suggest that dicalcium ph…
Abstract Many problems—from soil research to ceramics—require a reliable characterization of the clay minerals involved. This can be done using four clay-organic reactions: (i) staining tests and dye adsorption; (ii) glycerol and glycol adsorption; (iii) intercalation; (iv) alkylammonium ion exchange. Dye adsorption (…
The slip band formed in a grain on the material surface is a preferential site for crack initiation during low strain fatigue of polycrystalline metals. The forward and reverse plastic flow within the slip band is modeled in the present study by dislocations with different signs moving on two closely located layers, a…
Calorimetric, thermal expansion and optical measurements as well as optical observations confirm the sequence of structural phase transitions D 4h 17 (I) to D 2h 18 (II) to D 2h 12 (III) in the perovskite layer compound (C 2 H 5 NH 3 ) 2 CuCl 4 . For the I to II change the results show second-order character together…
Abstract Durch Erhitzen von Dicyano‐cobyrinsäure‐heptamethylester unter bestimmten Bedingungen wird zwischen den C‐Atomen 7 und 8 unter formaler Abspaltung von Essigsäure‐methylester eine neue Doppelbindung gebildet.
Experiments are presented which show that surface imperfections can give rise to a larger linear magnetoresistance than previously supposed; in fact, large enough to explain many hitherto-unexplained published results. A theoretical model, which takes into account both the finite width of the sample and the Hall field…