Materials Literature
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Purely ferroelastic transitions, i.e., transitions associated with a spontaneous deformation but no spontaneous polarization, appear from recent experimental investigations as a very common type of structural phase transitions. A theoretical analysis is presented for this class of transitions on the basis of Landau's…
The equivalent circuit in the mobility analogy of a magnetostrictive transducer in the presence of eddy currents is derived. This equivalent circuit is used to predict the effect of eddy currents on the efficiency, the electrical impedance, the transmitting responses, and the receiving sensitivity of a magnetostrictiv…
A revision and extension of theory is presented on the nozzle extraction process for obtaining “Handle Moduli” as a quantitative measure of fabric hand. The original one dimensional theory is replaced with a two dimensional membrane theory and a different internal pressure hypothesis is proposed which gives better agr…
Abstract The Raman and far‐infrared spectra of a dozen antimony halide complexes of formula SbX 6 −3 , SbX 5 −2 , Sb 2 X 9 −3 and SbX 4 −1 have been recorded and analyzed for X = Br and I. The stretching frequencies for the bromo complexes range from about 135 to 220 cm −1 for external bonds and from about 110 to 130…
We demonstrate that Ti implanted into α-Fe (with ∼60 appm C impurity) getters C (along with a lesser amount of N) upon postimplantation annealing and precipitates as TiC. The microstructure of the TiC precipitates is examined with TEM for annealing temperatures up to 860 °C. The precipitate size evolution is discussed…
A model substrate for studies in the hexahydroporphyrin series, i.e. the title compound (1) having C2v symmetry, has been prepared by a multistep de-novo synthesis from a cyanosubstituted thiolactam. Catalytic hydrogenation of (1) affords the highly O2-sensitive 2,3,7,8,15,24-hexahydro derivative; attempts to incorpor…
The susceptibility to selective dissolution of Cd‐Mg alloys in deaerated solutions, at room temperature to 75°C, was studied. The range of compositions studied was Cd‐11 a/o Mg (Cd‐2.6 w/o Mg) to Cd‐50 a/o Mg (Cd‐18 w/o Mg). Between −0.9 and −0.5V (NHE) , selective dissolution of magnesium was found. Cadmium was accum…
Abstract Bismuth tribromide exists in two modifications, α BiBr 3 is stable below and β BiBr 3 above 158°C. α BiBr 3 is monoclinic ( P 2 1 / a ) with a = 842.9(1) pm, b = 984.8(2) pm, c = 675.6(1) pm and β = 109.65(1)°. The structure contains trigonal pyramidal BiBr 3 molecules. Average distances are BiࢤBr = 266 pm (3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular electron transfer and valence isomerization in mononuclear nickel-macrocyclic ligand complexes: formation of paramagnetic nickel(I)-carbonyl complexesRobert R. Gagne and D. Michael IngleCite this: J. Am. Chem. Soc. 1980, 102, 4, 1444–1446Publication Date (Prin…
The backscattering from and the implantation of 0.5–10-keV hydrogen and helium in Au is investigated with the MARLOWE and TRIM computer codes. The following are found in this paper: (1) The results of the MARLOWE and the much faster TRIM codes are in satisfactory agreement. (2) The influence of potential parameters an…
Microautoradiography of tritium, observed at the electron microscope scale (SEM or TEM) was used to locate hydrogen trapped in the microstructure of Fe-Cr (50 ppm C) alloys, after cathodic charging. The morphology and behavior of the hydrogen traps depends on the thermal history of the specimens and is strongly relate…
Abstract Thermal gravimetric analysis, differential scanning calorimetry, and derivative thermal gravimetric analysis were utilized to characterize the thermal interactions between cellulose, 1‐6, anhydro β‐D‐glucopyranoside, and D‐glucose and model phosphate and phosphoramide flame retardants. The phosphoramides indu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of dithia-, selenathia-, and diselenaboranesG. Delbert Friesen, Antonio Barriola, Paul Daluga, Polly Ragatz, John C. Huffman, and Lee J. ToddCite this: Inorg. Chem. 1980, 19, 2, 458–462Publication Date (Print):February 1, 1980Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitrogen-14 nuclear quadrupole resonance spectra of coordinated pyridine. An extended evaluation of the coordinated nitrogen modelGerald V. Rubenacker and Theodore L. BrownCite this: Inorg. Chem. 1980, 19, 2, 392–398Publication Date (Print):February 1, 1980Publication Histor…
Abstract Man erhält die Substanzen in kristallinerform durch Umsetzung der reinen Alkalimetalle mit den Chalkogenen in flüssigem Ammoniak im Molverhältnis 2:3 bei Drucken bis zu 3000 bar und Temperaturen um 600 K. Sie kristallisieren alle im K 2 S 3 ‐Typ (Raumgruppe Cmc2 1 (Nr. 36)). Ihre Gitterkonstanten lauten: Das…
The general theory of nuclear-spin relaxation induced by translational self-diffusion in liquid crystals developed in a previous paper is applied to the smectic $A$ phase. The inter- and intralayer molecular jumps, the spin distribution, and the elongated shape of the molecules are taken into account. Results are obta…
Abstract Characterization studies on a series of coprecipitated alumina‐supported nickel methanation catalysts by X‐ray photoelectron spectroscopy are described. Binding energies and spectral shapes have been determined for several standard compounds (Ni, NiO, Ni(OH) 2 , NiAl 2 O 4 , Al 2 O 3 ) to provide background i…
Emission and excitation spectra of Eu 2+ ions incorporated in MgS, CaS and CaSe were measured at temperatures 300, 80 and 6 K. Both spectra are interpreted as due to the allowed transition between the Eu 2+ ion's ground state ( 8 S 7/2 ) of 4f 7 configuration and the excited states of 4f 6 5d configuration, together w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural studies of three tetrakis(carboxylato)dirhodium(II) adducts in which carboxylate groups and axial ligands are variedF. Albert Cotton and Timothy R. FelthouseCite this: Inorg. Chem. 1980, 19, 2, 323–328Publication Date (Print):February 1, 1980Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic methods. 15. Unsaturated acyl derivatives of silicon, germanium, and tin from metalated enol ethersJohn A. Soderquist and Alfred HassnerCite this: J. Am. Chem. Soc. 1980, 102, 5, 1577–1583Publication Date (Print):February 1, 1980Publication History Published online…