Materials Literature
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Electrochemical metal shaping and finishing processes involve anodic dissolution of metals at high rates. This paper presents a review of some fundamental aspects related to the understanding of such processes. Included are discussions of the phenomena of passive film breakdown that lead to the transpassive dissolutio…
Stents are tubular devices that are used in cylindrical passages of the body following trauma or disease in order to keep the cross section of these passages open. A mathematical model of a self-expanding metallic stent has been developed with the aim of predicting various geometrical and mechanical properties of the…
We have obtained the scanning tunneling microscopy (STM) images and scanning tunneling spectroscopy (STS) data with atomic-scale resolution for a SrTiO 3 (100) surface annealed in ultrahigh vacuum (UHV) at 1200°C. A √5×√5- R 26.6° surface superstructure indicating oxygen vacancy ordering has been observed. The STS dat…
Abstract High‐molecular‐weight copolymers of L , L ‐lactide with ε‐caprolactone were synthesized using initiators containing aluminium and zinc, i.e., AlEt 2 OEt, ZnEtO i Pr, Al(acac) 3 and AlEt 3 + ZnEt 2 + H 2 O. The chain microstructure was revealed to vary from random to diblock arrangement, depending on temperatu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPressure/temperature phase diagram of hexanitrohexaazaisowurtzitaneT. P. Russell, P. J. Miller, G. J. Piermarini, and S. BlockCite this: J. Phys. Chem. 1993, 97, 9, 1993–1997Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue…
The problem addressed in this paper concerns the statistical characterization of the state of residual stress generated in polycrystalline ceramics during cooling from the fabrication temperature. Detailed finite element simulations are carried out for an ensemble of large numbers of randomly oriented, planar hexagona…
Abstract A calibration procedure has been developed for XPS instrument intensity scales. The calibration is achieved by measuring the spectrum for reference foils of Ag, Au and Cu for which the true spectrum has been measured usng the metrology spectrometer . The ratio of the measured and reference spectra at 1 eV int…
A review is given of research into the measurement of crystal structure-factor amplitudes and phases by transmission electron diffraction. Accuracies for amplitudes are commonly a fraction of a percent (after conversion to X-ray structure factors) while phases may now be measured in favorable cases using three-beam el…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic conversion of simple haloporphyrins into alkyl-, aryl-, pyridyl-, and vinyl-substituted porphyrinsStephen G. DiMagno, Victor S. Y. Lin, and Michael J. TherienCite this: J. Am. Chem. Soc. 1993, 115, 6, 2513–2515Publication Date (Print):March 1, 1993Publication Histo…
Reported are the photophysical properties of the copper(I) halide clusters Cu4X4(dpmp)4 with the bulky organic base 2-(diphenylmethyl)pyridine (X = I, Br, Cl) which have been shown by previous crystal structure determinations to have “cubane”-like Cu4X4 cores with very similar Cu-Cu distances (2.87−3.01 Å). As solids…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNucleic acid dendrimers: novel biopolymer structuresRobert H. E. Hudson and Masad J. DamhaCite this: J. Am. Chem. Soc. 1993, 115, 6, 2119–2124Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.or…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolten salt synthesis and properties of three new solid-state ternary bismuth chalcogenides, .beta.-CsBiS2, .gamma.-CsBiS2, and K2Bi8Se13Timothy J. McCarthy, Stanley Pierre Ngeyi, Ju Hsiou Liao, Donald C. DeGroot, Tim Hogan, Carl R. Kannewurf, and Mercouri G. KanatzidisCite…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and processing of heterocyclic polymers as electronic, optoelectronic, and nonlinear optical materials. 2. New series of conjugated rigid-rod polyquinolines and polyanthrazolinesAshwini K. Agrawal and Samson A. JenekheCite this: Macromolecules 1993, 26, 5, 895–905P…
Corrosion of mild steel under completely anaerobic conditions in the presence of a mixed population biofílm, including sulfate-reducing bacteria (SRB), has been studied in a continuous flow system. The closed channel flow reactor was continuously fed with low concentration substrate at different dilution rates that in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron transfer in di(deoxy)nucleoside phosphates in aqueous solution: rapid migration of oxidative damage (via adenine) to guanineLuis Pedro Candeias and Steen SteenkenCite this: J. Am. Chem. Soc. 1993, 115, 6, 2437–2440Publication Date (Print):March 1, 1993Publication Hi…
The fatigue life of microcellular polycarbonate specimens of five different relative densities ranging from 0.52 to 0.97 was measured in tension-tension tests on dumbbell specimens. Fatigue life varied with relative density and maximum nominal cyclic stress. The fatigue life of microcellular polycarbonate with relativ…
Abstract Carbothermal reduction kinetics to synthesize SiC is studied under conditions of high carbon/silica precursor heating rates (10 5 K/s) and minimized reaction times (s) over a wide temperature range (1,848⩽T⩽2,273 K). The reaction mechanism includes rapid formation of a gaseous SiO intermediate. Further carbon…
Crystallization of BaTiO 3 from an X‐ray amorphous, metal organic precursor was investigated by comparing samples heated in O 2 , air, argon, and CO 2 . It is evident that an intermediate barium titanium oxycarbonate phase forms between 500° and 620°C and that BaTiO 3 forms directly by the endothermic decomposition of…
Shape transformations of two-compoent vesicles in which the spontaneous curvature depends on the local compositions in the two monolayers are investigated theoretically. Even if the two components do not exhibit lateral phase separation in spherical vesicles, temperature-induced shape transformations cause lateral pha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTContribution of entanglements to the mechanical properties of carbon black-filled polymer networksG. Heinrich and T. A. VilgisCite this: Macromolecules 1993, 26, 5, 1109–1119Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue…