Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChromatographic peak shapes. Their origin and dependence on the experimental parametersEli GrushkaCite this: J. Phys. Chem. 1972, 76, 18, 2586–2593Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https://pubs…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect evidence from carbon-13 nuclear magnetic resonance for intramolecular scrambling of carbonyl groups in a metal atom cluster carbonyl, tetrarhodium dodecacarbonylF. A. Cotton, L. Kruczynski, B. L. Shapiro, and L. F. JohnsonCite this: J. Am. Chem. Soc. 1972, 94, 17, 619…
In this paper we examine how the joint strength of lap joints containing a brittle adhesive may be affected by partial removal of adhesive from the bonded area. It is found that the shear strength in tension of a lap joint specimen is governed essentially by the leading edges of the joint and not by the bonded area.
Transmission electron microscopy and immersion density techniques were used to characterize the nature and extent of radiation damage in zone refined and commercial purity magnesium irradiated to 1.7 × 1021 neutrons/cm2 (>0.1 MeV) at about 75°C. Swelling from radiation-induced voids was 1.9 and 0.7 per cent, respectiv…
Abstract A study of the mineralogical changes taking place during the loss of interlayer water in an halloysite has been carried out in order to clarify the relationship between the most hydrated and least hydrated states of the mineral. A number of samples of halloysite which together exhibit a variety of average int…
Advances in machine learning have impacted myriad areas of materials science, such as the discovery of novel materials and the improvement of molecular simulations, with likely many more important developments to come. Given the rapid changes in this ...Read More
The effect of stabilizing the properties of piezoelectric Pb(ZrTi)O3-ceramics by addition of the oxides of Mn, Cr or U is studied. Some ordering of the polarization is found to be preserved after heating the material above the Curie temperature. A model for the mechanism is presented, the basic idea of which is the tr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDrop Breakup in Simple Shear Fields of Viscoleastic FluidsRaymond W. FlumerfeltCite this: Ind. Eng. Chem. Fundamen. 1972, 11, 3, 312–318Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https://pubs.acs.org/do…
Diffusion of 63Ni in polycrystalline α-Ti and of 59Fe, 60Co and 63Ni in α-Zr has been measured. In α-Zr, single crystals were used for studies of Ni and Go diffusion, while the experiments on Fe diffusion were done on polycrystalline specimens. All the solutes studied exhibited extremely fast diffusion compared to sel…
Abstract A smectite rich in ferrous iron and low in aluminum occurs abundantly in the Red Sea Geothermal Deposits, and appear to be forming at present. Chemical analyses and Mössbauer spectra indicate the mineral is intermediate in composition between nontronite and the as yet undescribed trioctahedral ferrous iron en…
Abstract Published measurements of the diffusion of hydrogen in fcc metals are summarized with particular emphasis on the isotope effect. The observations are generally consistent with the usual rate theory model but with the energy levels in both the equilibrium site and the saddle point quantized according to an Ein…
Abstract The relative amounts of the α and the γ crystalline forms of nylon 6 obtained from the melt under different crystallization conditions have been studied by an x‐ray diffraction procedure by comparison with a calibration curve obtained from the diffraction of standard samples. The weight fraction of the α form…
Optical constants have been obtained for glassy carbon from 0 to 82 eV by means of reflection measurements. The data have been analyzed by analogy with those for graphite in terms of single electron excitations and of collective oscillations of the π and σ electrons.
Nonisothermal techniques for analyzing initial‐stage sintering are reviewed. It is shown that in principle they permit the determination of all the sintering parameters (rate law, activation energy, and diffusion coefficients) normally obtained from isothermal experiments. Comparison with results from isothermal exper…
Stoichiometric NiAl 2 O 4 , CuAl 2 O 4 , and ZnAl 2 O 4 spinels were prepared and equilibrated at temperatures from 600° to 1400°C. The parameters u and x , denoting the oxygen position and fraction of divalent cations on tetrahedral sites, respectively, were determined from a detailed X‐ray diffraction analysis. In N…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeteropoly and isopoly anions as oxo complexes and their reducibility to mixed-valence bluesMichael T. PopeCite this: Inorg. Chem. 1972, 11, 8, 1973–1974Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https:…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic spectra of the negative ions of some metal phthalocyaninesD. W. Clack and J. R. YandleCite this: Inorg. Chem. 1972, 11, 8, 1738–1742Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https://pubs.acs…
Abstract The reduced Raman spectrum of amorphous Te consists of broad maxima at 90 and 157 cm −1 . The spectrum reflects the vibrational density of states and is interpretable in terms of disordered chains. The highest vibrational energies of the disordered chains are higher than the corresponding energies of the orde…
Abstract Submicrocracks, free radicals, and endgroups of scissioned molecules formed in polyethylene, polypropylene, and polycaprolactam under uniaxial tension have been investigated. Measurements were carried out by small‐angle x‐ray scattering, electron paramagnetic resonance, and infrared spectroscopy. The concentr…
Evidence is presented to demonstrate that although the critical pitting potential is qualitatively related to the resistance of a material to passivity breakdown by pit initiation, it is of questionable value in predicting the corrosion performance of a structure containing crevices. Experiments conducted on a 30Cr-3M…