Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of sugar-substituted cyclic and polymeric phosphazenes and their oxidation, reduction, and acetylation reactionsHarry R. Allcock and Angelo G. ScopelianosCite this: Macromolecules 1983, 16, 5, 715–719Publication Date (Print):May 1, 1983Publication History Published…
The broadening of the $^{57}\mathrm{Fe}$ M\"ossbauer line due to diffusion jumps of the Fe atoms in an Al single crystal has been measured as a function of crystal orientation. The broadening is strongly anisotropic. Theoretical calculations for the broadening using the five-frequency model for the motion of an Fe ato…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlatinum/titanium dioxide (rutile) interface. Formation of ohmic and rectifying junctionsGregory A. Hope and Allen J. BardCite this: J. Phys. Chem. 1983, 87, 11, 1979–1984Publication Date (Print):May 1, 1983Publication History Published online1 May 2002Published inissue 1 Ma…
Abstract The objective of this study was to produce corrosion behavior data for each of the commonly used metallic alloys in surgical implants. In addition, by applying the known electrochemical corrosion theory, the study aims to predict the behavior of galvanic couples made of any two of the materials. From this pre…
A model for the low-temperature properties of quasi-one-dimensional superconductors, including quantum effects, is investigated. Both long-range Coulomb effects and scattering by nonmagnetic impurities enhance quantum effects. For strong quantum fluctuations the transition from a fluctuating to a long-range-ordered su…
We report both experimental and theoretical studies of the ${\mathrm{Tl}}^{0}$(1) center in KCl, a center consisting of a neutral Tl atom perturbed by the field of an adjacent anion vacancy. Absorption bands peaking at 1040, 720, 550, and 340 nm are all shown to belong to the ${\mathrm{Tl}}^{0}$(1) center. The relativ…
The method of point-group determination from convergent-beam electron diffraction patterns has been established by Buxton, Eades, Steeds & Rackham [Philos. Trans. R. Soc. London (1976), 281, 171-194]. However, Table 2 given by them is inconvenient for practical purposes, since many symmetries of the dark-field and ±G…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of the "pocket" porphyrinsJames P. Collman, John I. Brauman, Terrence J. Collins, Brent L. Iverson, George Lang, Roger B. Pettman, Jonathan L. Sessler, and Marc A. WaltersCite this: J. Am. Chem. Soc. 1983, 105, 10, 3038–3052Publication Date (Pr…
The structure of the martensitic phase of the shape memory alloy NiTi has been determined from a power neutron diffraction study at 10K. The lattice is monoclinic, space group P2 1 /m(C 2h 2 ) with a=2.884(2) AA, b=4.110(2) AA, c=4.665(3) AA, beta =98.10(4) degrees and Z=2. The structure has been refined to an R WP =0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFurther studies of the dimeric .beta.-linked "face-to-face four" porphyrin: FTF4James P. Collman, Fred C. Anson, Craig E. Barnes, C. Susana Bencosme, Thomas Geiger, Eric R. Evitt, Robert P. Kreh, Kurt Meier, and Roger B. PettmanCite this: J. Am. Chem. Soc. 1983, 105, 9, 2694…
Fundamental and applied works involving the electrochemical utilization of metal hydrides are reviewed. In the first part of the paper, studies that investigated metal hydrides for hydrogen storage in nickel hydrogen batteries are reviewed. These studies showed that use of hydrides lowered the operating pressures in n…
The electrical properties of Au/PcZn/M devices are studied both in the dark and under illumination. The nature of the semitransparent metallic electrode M is varied. When the sandwiches are made and studied entirely under vacuum (10−7–10−8 Torr), no rectifying effect is observed in the dark and the open circuit voltag…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntercalation into niobium oxide phosphate hydrate (NbOPO4.3H2O) and comparison with vanadyl phosphate hydrate (VOPO4.2H2O)K. Beneke and G. LagalyCite this: Inorg. Chem. 1983, 22, 10, 1503–1507Publication Date (Print):May 1, 1983Publication History Published online1 May 2002…
A theory is formulated for the general fatigue response of brittle flaws which experience residual stress concentrations. The indentation crack is taken as a model flaw system for the purpose of setting up the basic fracture mechanics equations, but the essential results are expected to have a wider range of applicabi…
Smooth Pt and optically transparent electrodes can be functionalized with redox active polymeric material derived from the hydrolytically unstable {N,N'‐bis[‐3‐(trimethoxysilyl)propyl]‐4,4'‐bipyridinium}dibromide, I . The redox polymer on the surface is reversibly reducible to in either , and in the reduction of to is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMelting behavior of crystalline/compatible polymer blends: poly(iε-caprolactone)/poly(styrene-co-acrylonitrile)Peter B. Rim and James P. RuntCite this: Macromolecules 1983, 16, 5, 762–768Publication Date (Print):May 1, 1983Publication History Published online1 May 2002Publis…
Lanthanum‐modified lead titanate ceramics with a tetragonality of c/a = 1.028 to 1.000 were hot‐pressed and the dielectric, electromechanical, optical, and mechanical properties were investigated. With decreasing c/a , the Curie point, remnant polarization, coercive field, and electromechanical coupling factors decrea…
A review is given of research whose objective is to understand the principles governing corrosion beneath organic coatings. Eight subject areas of special interest are discussed: electrical properties of coatings, the nature of the metal substrate in determining coating performance, electrochemical processes which tak…
Magnetization measurements and X-ray diffraction experiments have been made on ε -Mn 3 Ga (71.4 at%Mn) having a triangular spin structure with a weak ferromagnetic component below 460 K. It has been found that the D0 19 -type hexagonal structure is slightly distorted to an orthorhombic structure below 170 K, and that…
The fragmentation response of explosive-filled cylinders of Armco iron and HF-1 steel with two heat treatments has been determined. The cylinders were filled with cast-in-place composition B explosive and detonated. At least 99% of the metal mass was recovered in all the experiments. The recovered fragments had both b…