Materials Literature
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In order to obtain the collapse strength data on the spherical shells suitable to the pressure capsule of DSSV, collapsing tests were conducted using spherical shell models by means of MHI 1, 200 kg/cm2 hydrostatic tank. These models were made from several kinds of materials including ultra-high yield strength steels…
Low frequency bands due to librational motions of the nitrate ion are observed in the Raman spectra of molten lithium nitrate (at 143 cm–1) and molten silver nitrate (at 107 cm–1). The peak frequencies, shapes and intensities of these bands were studied as a function of dilution with various other salts. It is conclud…
Fluorescent decay times of solid Tb(dpm)3 and its monoadducts with EtOH, EtOD, and pyridine have been determined over the temperature range 77—323 K. The decay time of Tb(dpm)3, in contrast to the adducts, is markedly temperature-dependent. This anomalous behaviour is interpreted as a result of thermal population of a…
CeAsS crystallizes in the monoclinic group P2₁/b ; the unit cell dimensions are : a = 4.047 Å ; b = 5.616 Å ; c = 17.450 Å ; γ = 135.85°. There are four formulae per unit cell. The crystals are twinned by reticular pseudomerohedry. The structure (R = 0.093) is closely related to the antitype of Fe₂As. It shows compact…
Abstract Various substituents were added onto starch by means of esterification or etherification so that their effect on reactivity of starch with isocyanates in a nonpolar solvent could be studied. Maximum reactivity of the modified starches was achieved when the degree of substitution (D.S.) was about 0.7. Cured ur…
Abstract Solid-liquid equilibria were studied by a visual method in order to draw the polythermal pro-jections of the (Tl, Na, Li)NO 3 , (Tl, Na, Rb)NO 3 , and (Tl, Na, Cs)NO 3 ternary systems. The seven pertinent binaries are also discussed and data concerning the invariant points and crystallization regions are give…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstituent effects on the half-wave potentials of chalcones in dimethylformamideDavid W. Boykin Jr., Mary L. Ash, and Frank L. O'BrienCite this: J. Org. Chem. 1972, 37, 1, 106–110Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published…
Abstract not Available.
The principal and average magnetic moments of Cs3CoX5 and (Et4N)2CoX4, [X = Cl, Br] have been measured in the temperature range 80–300 K. Magnetic transitions showing small hysteresis effects are found for both tetraethylammonium salts. The results are correlated with a point-charge model of D2d symmetry by use of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand field spectra of some tris(1,3-diketonato)iron(III) chelates. Electronic repulsion parameters and the nephelauxetic effectAngelo M. Fatta and Richard L. LintvedtCite this: Inorg. Chem. 1972, 11, 1, 88–92Publication Date (Print):January 1, 1972Publication History Publi…
The lower yield and flow stresses of polycrystalline pure iron specimens with a wide range of grain sizes from 10.3 μ to 102 μ were measured by tensile test at the temperatures between 77°K and 473°K at the strain rates from 10-7 sec-1 to 1 sec-1. The observed stress was decomposed into a friction part (al) and grain…
A study has been made of precipitation processes in selected magnesium-base alloys by means of electron microscopy. The principal part of the investigation was concerned with the effect of manganese precipitation in a Mg-Th alloy. It is shown that the sequence of precipitation in a Mg–2.0percnt; Th–1.0% Mn alloy (HM21…
Abstract The possibility that the presence of several processes occurring during the crystallisation of polymers may account for anomalous constant fractional values of the Avrami exponent is reconsidered, and for various reasons rejected. Experimental isotherms exhibit systematic variations when analysed as two stage…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcid-catalyzed isomerization of thujopseneGarry C. Kitchens, H. U. Daeniker, Alan R. Hochstetler, and Kent KaiserCite this: J. Org. Chem. 1972, 37, 1, 1–5Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inissue 1 January 1972htt…
ABSTRACT: X-ray analyses indicate that illite, smectite, loughlinite (Na20.3MgO. 6SIO2.8H20) and chlorite are present in the < 2/zm fraction of the lacustrine Green River Formation (Eocene) of Wyoming. Material amorphous to X-rays and random mixed-layer structures are present in subordinate amounts. Individual…
The effects of alloying elements on the pitting corrosion of aluminum in an 1N–NaCl solution have been studied by using binary aluminum alloys containing different amounts of alloying elements, Fe, Si, Cu, Mg, Mn, Ni, V, Cr, B, Zr, Ti and Be. Anodic and cathodic polarization curves, pitting potentials, pitting dissolu…
A total of 1150 specimens of 189 different alloys were completely immersed in surface seawater for 12 and 18 months to obtain data for comparison with deep ocean corrosion data.Corrosion rates, types of corrosion and pit depths were determined.Some highly alloyed nickel alloys, titanium alloys, silicon cast irons, spe…
Zirconium-based alloys with small additions of tin, molybdenum, niobium and aluminum are being developed as candidate materials for high-strength pressure tubes in advanced CANDU reactors. The out-reactor creep and stress-rupture properties of 12 alloys based on these elements have been determined and correlated with…
Abstract
The thermodynamics and relaxational behaviour of viscous liquids as they approach the glass transition can be duplicated by assuming quasi-independent units in the liquid of several hundred molecules, which below some characteristic temperature occur in potential energy minima. The form of the distribution of the numb…