Materials Literature
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Boron arsenide films have been deposited on the basal plane of hexagonal silicon carbide and {111} oriented sodium fluoride and silicon substrates at 800°–850°C by the thermal decomposition of a diborane‐arsine mixture in a hydrogen atmosphere. Adherent films were deposited on silicon carbide substrates and were ident…
Equipment and procedures used in performing tension, fracture mechanics, fatigue, and creep tests on metal specimens in high-pressure hydrogen are described. Important test parameters, in particular, hydrogen purity and methods of achieving high purity are considered. The interpretation and use of data obtained from t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of low-spin cobalt porphyrins. IV. Molecular stereochemistry of (1-methylimidazole)-.alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatocobalt(II)W. Robert ScheidtCite this: J. Am. Chem. Soc. 1974, 96, 1, 90–94Publication Date (Print):January 1, 1974Publicati…
A review has been prepared of the metallurgical factors affecting the hardenability and mechanical properties of boron-treated low-alloy steels. Detailed experimental work has been carried out to clarify the following controversial aspects of these steels: (a) occurrence of boron in steels; (b) influence of boron cont…
Abstract not Available.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1972. Ph.D.
Three kinds of fibers with a widely different morphology were isolated from several species of horny sponges: (a) intercellular collagen fibrils (spongin A of Gross3); (b) spongin fibers (spongin B3); and (c) a distinct filament present only in Ircinia. In the last two fibers elementary fibrils can be distinguished un…
Kinetics of phosphate desorption from twenty soils by anion‐exchange resin were not satisfactorily explained by either film diffusion (or ion exchange mechanism) mechanism or particle diffusion mechanism. Eut the phosphate desorption process was adequately explained by a two‐constant rate equation. The two constants,…
Abstract Macronet isoporous polystyrene gels, obtained by cross‐linking of linear polystyrene in solution with p ‐xylylenedichloride or 4, 4′‐bis‐chloromethylbiphenyl, differ from conventional styrene‐divinylbenzene (DVB) copolymers by high solvent‐uptake capacity, high inner surface area, and the ability to increase…
Lattice constants and atomic parameters of YMnO3 were investigated from room temperature up to 1010°C. Lattice constant c decreases slowly with temperature, contrary to earlier publication. With rising temperature small changes of the crystal structure were observed. The paraelectric phase is probably disordered and t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic study of the reaction of evaporated metal films with chlorine gasKosaku Kishi and Shigero IkedaCite this: J. Phys. Chem. 1974, 78, 2, 107–112Publication Date (Print):January 1, 1974Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Kinetic Model for the Prediction of Hydrocracker YieldsBruce E. StangelandCite this: Ind. Eng. Chem. Process Des. Dev. 1974, 13, 1, 71–76Publication Date (Print):January 1, 1974Publication History Published online1 May 2002Published inissue 1 January 1974https://doi.org/10…
Conference International Conference on Coordination Chemistry, International Conference on Coordination Chemistry, ICCC, Coordination Chemistry, Fifteenth, Moscow, USSR, 1973-06-25–1973-06-30 Published Online: 2009-01-01 Published in Print: 1974-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
The least-squares strain is computed from calcite twin lamellae in cylinders of Indiana limestone experimentally shortened from 0 to 8.5 percent at 1.0-kb confining pressure, room temperature, and a constant strain rate of 10 −4 /sec. The best fit to the experimental results is obtained by using the inner width of the…
The weight gains of Al specimens immersed for short times in water at 50°–70°C were measured. An analysis of these data and published results at other temperatures indicated that the kinetics of pseudoboehmite film growth in the temperature range 50°–100°C is determined initially by the nucleation and growth of hydrol…
The dependence of the melting temperature of starch on its concentration in a polymerdiluent mixture was determined. The resultant data were analysed by application of the thermodynamic equations appropriate to a first-order phase transition. It is suggested that this analysis may be used to explain certain features o…
Thin foils of an ‘ experimental ’ austenitic stainless steel, with and without dispersions of aluminium oxide particles, are irradiated with 1 MeV electrons in a High Voltage Electron Microscope at 600°C. Evidence of grain size dependent void nucleation, void concentration, and void volume swelling are presented for g…
X-Ray photoelectron spectra of a variety of uranium oxides have been studied and compared with the spectrum obtained from the pure metal. The oxide phases studied were UO2·0, UO2·1, UO2·2, U4O9, U3O7, U3O8, and γ-UO3 where the formal oxidation number of uranium alters from IV to VI. Significant chemical shifts observe…
The Langmuir method for measurement of vapour pressures has been tested for use in studies of decomposition reactions. The isothermal weight loss in vacuum from cleavage (10text-decoration:overline11) planes of calcite (CaCO3) single crystals was measured continuously at temperatures from 934 to 1013 K. The rate was c…
An equidimensional single crystal of Fe2(CO)9 has been used to reinvestigate the molecular structure. The results confirm all the main qualitative features originally reported by Powell and Ewens, and provide the level of accuracy needed for comparison with other structures and for molecular orbital calculations. The…