Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The dependences of the radiationless relaxation rate constant on the effective mediating phonon energy, the equilibrium displacement of the adiabatic surfaces, the energy gap, and the temperature are numerically examined in terms of a generalized theoretical rate expression derived from quantum statistical theory. Spe…
Abstract : The TPRC Data Series published in 13 volumes plus a Master Index volume constitutes a permanent and valuable contribution to science and technology. This 17,000 page Data Series should form a necessary acquisition to all scientific and technological libraries and laboratories. These volumes contain an enorm…
Corrosion of pure and amalgamated zinc in pure concentrated solutions was investigated using two methods: ( a ) galvanostatic measurements of the kinetics of hydrogen evolution with electrodic assessment of corrosion properties of the system, and ( b ) volumetric measurement of the hydrogen evolution reflecting direct…
Grain size dependence of the yield stress in polycrystalline copper-aluminum and copper-nickel alloys is measured at 77, 194 and 293°K. It is found that the Hall-Petch relation is valid for these materials. The Petch slope ky is nearly independent of the temperature, but increases with increasing solute concentration.…
The rare earth‐Fe2 (RFe2) compounds possess huge magnetic anisotropies and magnetostrictions at room temperature. This, coupled with a relatively high Curie temperature and magnetic saturation, makes these alloys attractive for various applications, including magnetostrictive transducers and permanent magnets. A varie…
An electron microscope study is made on isothermal decomposition in Alnico 8 alloy as annealed around 800°C for 10–90 min in a magnetic field. The results obtained are found to agree well in many essential aspects with Cahn’s theoretical predictions on spinodal decomposition in a ferromagnetic cubic alloy. In the case…
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…