Materials Literature
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After limit of strain hardening, fatigue crack was assumed to form as a result of large tensile stress by a piled-up group of dislocations plus externally applied tensile stress component, with the aid of other stress concentration factor associated with the obstacle or inclusion itself Nucleation theory was applied t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation and Some Properties of Magnesium Hydride1F. H. Ellinger, C. E. Holley Jr., B. B. McInteer, D. Pavone, R. M. Potter, E. Staritzky, and W. H. ZachariasenCite this: J. Am. Chem. Soc. 1955, 77, 9, 2647–2648Publication Date (Print):May 1, 1955Publication History P…
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Este articulo resume los trabajos sistemáticos de investigación, realizados por la. "Société Profeasionnelle des Produits Francais de Terre Cuite” y del "Service des Recherches Teohniques de la Sooiété Francaise de Céramique”. Tenían como finalidad el mejoramiento de las calidades de las arcillas utilizadas en la fabr…
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La finalidad de las investigaciones era la preparación de un hormigón de alta calidad, con empleo de árido lo más grueso posible (lo que determina una economía en el consumo de cemento), y con una relación agua cemento lo más bajo posible, presentando, al mismo tiempo, la máxima docilidad y movilidad.
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The optical strains and dielectric constants of small single crystals of sodium niobate have been measured over the temperature range -190°c to +650°c. At room temperature the properties are consistent with an antiferroelectric structure, and for high fields applied perpendicular to the orthorhombic c axis, double hys…
It has been found that ferroelectric BaTi${\mathrm{O}}_{3}$ single crystals show a differential etch rate when etched in hydrochloric acid. The positive end of the electric polarization etches much faster than the negative one. Thus this phenomenon affords a valuable new tool for the investigation of the ferroelectric…
Elastic- and electrostatic-energy considerations are insufficient for an explanation of cation ordering between tetrahedral and octahedral sites in spinels. Tetrahedral, octahedral, and square covalent bonds are also important when cations are to be accommodated in these sites. The square bonds in octahedral sites can…
The crystal structure of Mn2Sb has been re-examined. Rotation and Laue patterns from small fragments and patterns using powdered samples confirmed the published tetragonal structure with a ----4.08, c -----6.56 A. Large single crystals were grown to make possible a study of reflections from 00/, h00 and hhO planes. Re…
Abstract Es wird der Stand der heutigen Katalyse‐Forschung aufgezeigt und die gegenseitige Beziehung zu der Halbleiter‐Theorie herausgestellt. Nach Behandlung der Grundlagen der Randschicht‐Theorie der Chemisorption wird vor allem am Beispiel des N 2 O‐Zerfalls und der CO‐Oxydation der Mechanismus des wechselseitigen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Reactions of Two Diaryl Diselenides with Mercury(II) ChlorideEdwin S. Gould and Albert AmendolaCite this: J. Am. Chem. Soc. 1955, 77, 8, 2103–2104Publication Date (Print):April 1, 1955Publication History Published online1 May 2002Published inissue 1 April 1955https://pub…
Abstract Unter Hinzuziehung spektroskopischer Ergebnisse werden für Äthylendiaminotetraessigsäure und o‐Cyclohexandiaminotetraessigsäure als Komplexbildner die Bildungskonstanten sowohl der Eu (III)‐ als auch der Eu (II)‐Komplexe aus polarographischen Messungen ermittelt und damit die Existenzbereiche der einzelnen Ko…