Materials Literature
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Factors governing stress corrosion cracking (SCC) of low strength, low alloy nickel steels (e.g., ASTM A203 Grade E) in sulfide environments were investigated using a three point loaded bent beam specimen. Cracking occurred in both weld and base metal at low H2S partial pressures (to 0.001 atmosphere) and stress level…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEmpirical or Scientific Approach to Evaluate the Corrosion Protective Performance of Organic CoatingsW. Funke and H. HaagenCite this: Ind. Eng. Chem. Prod. Res. Dev. 1978, 17, 1, 50–53Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Publish…
Hexagonal ferrites are of interest for microwave and millimeter-wave devices. We have grown single crystal layers of hexagonal ferrites on non-magnetic spinel substrates using the isothermal dipping method of liquid phase epitaxy. Ferrimagnetic resonance spectra of M-type layers at 35 GHz exhibited half power linewidt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCyclophosphazene clathrates - exploring the adjustable tunnelHarry R. AllcockCite this: Acc. Chem. Res. 1978, 11, 3, 81–87Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.org/doi/10.1021/ar5012…
We have investigated the chemisorption of O2 on TiO2 and SrTiO3 surfaces by using ultraviolet photoemission difference spectroscopy. Both nearly perfect surfaces and surfaces having a high density of defects associated with filled Ti(3d) surface states were studied. On all surfaces low O2 exposures produced an initial…
Abstract The mechanics of ion incorporation into a crystal are examined in order to evaluate mechanisms of calcite growth inhibition and morphology control. Crystallographic considerations indicate that while the Folk (1974) mechanisms of Mg (super +2) interaction with calcite may be responsible for inhibiting crystal…
SUMMARY A study of the vertical and lateral variations in particle size distribution, mineralogy and other petrographic features of tills in East Yorkshire, Lincolnshire and north Norfolk shows that the Devensian glacial succession in eastern England contains only two tills, for which the new names Skipsea and Withern…
We consider the problem of the evaluation of the ensemble averaged translational friction coefficient of, and the velocity field produced by, a single nonrotating sphere, moving with uniform velocity through a stationary suspension of similar spheres at finite concentrations, where the average is performed over the sp…
A study is presented on the influence of strain rate and strain rate history on the flow stress of several metals. Experiments were performed on specimens of four polycrystalline metals: 1100-0 aluminum, OFHC copper, AZ31 B magnesium, and commercially pure zinc. The experiments involve, the use of a modified Kolsky ba…
Segregation of metalloid impurities to grain boundaries of iron and its alloys can produce brittle intergranular cracking under a variety of external conditions. This set of phenomena is reviewed in terms of: segregation in dilute iron–metalloid binary alloys, interactions of metalloid elements with other solutes to e…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of the toluene solvate of .alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatochromium(II)W. Robert Scheidt and Christopher A. ReedCite this: Inorg. Chem. 1978, 17, 3, 710–714Publication Date (Print):March 1, 1978Publication History Published online1 May 2002…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLarge metal ion-centered template reactions. Chemical and spectral studies of the "superphthalocyanine" dioxocyclopentakis(1-iminoisoindolinato)uranium(VI) and its derivativesTobin J. Marks and Djordje R. StojakovicCite this: J. Am. Chem. Soc. 1978, 100, 6, 1695–1705Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExpansion of molecular orbital wave functions into valence bond wave functions. A simplified procedureP. C. Hiberty and C. LeforestierCite this: J. Am. Chem. Soc. 1978, 100, 7, 2012–2017Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Publi…
Electron spectroscopy for chemical analysis (ESCA) was used to study the surface composition of several radiation-grafted polymers in both the dry and hydrated (frozen at 160°K) states. Poly(2-hydroxyethyl methacrylate) (HEMA) and polyacrylamide, both hydrophilic polymers, were readily detected in the hydrated or dehy…
Abstract Highly stretched rubber sheets can be split apart quite easily, indicating that the originally isotropic material becomes “fibrous” in character— i.e. , much weaker for a tear running in the direction of extension than for one running at right angles to it. This anisotropy of strength is shown most clearly by…
A variable surface acoustic wave (SAW) delay line was fabricated using a thin (<1 μm) magnetostrictive film, metallic-glass overlay. It is well known that metallic-glasses can be prepared in ribbon form by rapid quenching from the melt. However, it is difficult to prepare thin film overlays of these materials f…
Materials prepared by modifying sulfur with dicyclopentadiene or styrene consist of unreacted sulfur and polysulfides. Dicyclopentadiene reacts with sulfur to give, initially, low-molecular-weight polysulfides (e.g., a pentasulfide) which convert to high-molecular-weight polymers at 140°C. Styrene initially gives high…
Bacillus subtilis grown at temperatures below 37 degrees contains two thymidylate synthetases, TSaseA and TSaseB. Their presence is dependent on functional thyA and thyB genes, respectively. When cells are grown at 46 degrees they only contain TSaseA activity. This allous an easy positive selection for thyA and thyA,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime Resolved Fluorescence Studies of Poly(N-vinylcarbazole), Poly(1-vinylnaphthalene), and 1,3-Bis(N-carbazolyl)propaneC. E. Hoyle, T. L. Nemzek, A. Mar, and J. E. GuilletCite this: Macromolecules 1978, 11, 2, 429–431Publication Date (Print):March 1, 1978Publication History…
To determine if MgO added within the solubility limit in Al 2 O 3 is sufficient to suppress discontinuous grain growth, an undoped alumina pellet was sintered next to a preequilibrated, two‐phase mixture of spinel (MgAl 2 O 1 ) and alumina. The MgO‐doped outer surface of the undoped pellet did sinter to full density;…