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Abstract Depth composition and chemical states of elements constituting the overlayers of Ni x Cr alloys ( x = 0–30 at.%) passivated in borate buffer solutions (pH = 9.2) were determined as a function of the chromium bulk content of the alloy. Depth sputter profiling was performed using both Auger electron spectrosco…
The effect of yttria additions up to 10 wt% on the thermal conductivity of pressureless‐sintered aluminum nitride was investigated. Additions of up to 3 wt% increased the thermal conductivity to values around 160 W/(m·K). Additions higher than 5 wt% slowly decreased the thermal conductivity because of the increasing v…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMelting and Crystallization in Bacterial Poly(.beta.-hydroxyvalerate),PHV, and Blends with Poly(.beta.-hydroxybutyrate-co-hydroxyvalerate)Robert P. Pearce and Robert H. MarchessaultCite this: Macromolecules 1994, 27, 14, 3869–3874Publication Date (Print):July 1, 1994Publicat…
The evolution of individual He bubbles in thin Al foils during 200-keV Xe irradiation at room-temperature has been followed with in situ transmission electron microscopy. He bubbles were produced by room-temperature implantation of 3-keV He ions into prethinned aluminum samples. During subsequent xenon irradiation, se…
A hierarchically structured hybrid vascular tissue was prepared from vascular cells and collagen. First a hybrid medial tissue was prepared by pouring a cold mixed solution of bovine aortic smooth muscle cells (SMCs) and Type I collagen into a tubular glass mold composed of a mandrel and a sheath (inner diameter, 1.5…
We report x-ray photoemission spectra (XPS) of hydrated nickelic oxide (Ni2O3⋅6H2O). XPS spectra were measured with the Physical Electronics Model 5400 x-ray photoelectron spectrometer using unmonochromatized Mg Kα x rays at two pass energy settings corresponding to analyzer energy resolutions of 1.34 and 0.54 eV. We…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of Polysiloxanes Bearing Cyclic Carbonate Side Chains. Dielectric Properties and Ionic Conductivities of Lithium Triflate ComplexesZhenya Zhu, Alison G. Einset, Chia-Yu Yang, Wei-Xiao Chen, and Gary E. WnekCite this: Macromolecules 1994, 27, 15, 4076–4079Publicatio…
We report x-ray photoemission spectra (XPS) of slightly hydrated Ni(OH)2. XPS spectra were measured with the Physical Electronics Model 5400 x-ray photoelectron spectrometer using unmonochromatized Mg Kα x rays at two pass energy settings corresponding to analyzer energy resolutions of 1.34 and 0.54 eV. We present the…
It is important to systematically assess the severity of a sour environment for susceptibility to sulfide stress cracking (SSC). A prediction system was established based upon SSC as a phenomenon of hydrogen embrittlement (HE). The content of H entering into steel (HFe) could be predicted from the hydrogen sulfide (H2…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDioxygen Binding in Iron and Cobalt Picnic Basket PorphyrinsJames P. Collman, Xumu Zhang, Kelvin Wong, and John I. BraumanCite this: J. Am. Chem. Soc. 1994, 116, 14, 6245–6251Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue…
Highly uniform, smooth nanocrystalline diamond films have been fabricated with a magnetoactive microwave chemical vapor deposition system. The top and bottom magnet currents were 145 and 60 A, respectively, while the microwave power and substrate temperature were controlled at 1500 W and 850 °C, respectively during de…
Evolution of viscoelasticity in an end-linking gel system has been investigated. Storage and loss dynamic shear moduli, G′(ω) and G″(ω), are determined for angular frequencies ω over more than 2.5 decades near the sol-gel transition. Gelation conditions are varied widely to obtain critical exponents which are independ…
The complex dielectric response of strontium barium niobate relaxor ferroelectrics has been studied as a function of orientation and composition. The dielectric response was found to be strongly dependent on orientation, in distinct comparison to the nearly orientation-independent response found for Pb-based perovskit…
We report x-ray photoemission spectra (XPS) of hydrated nickel hydroxide, α-Ni(OH)2, with composition 3Ni(OH)2 2H2O as determined by thermogravimetry. XPS spectra were measured with the Physical Electronics Model 5400 x-ray photoelectron spectrometer using unmonochromatized Mg Kα x rays at two pass energy settings cor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen Bonding in Micelle FormationPushpa Venkatesan, Yuan Cheng, and Daniel KahneCite this: J. Am. Chem. Soc. 1994, 116, 15, 6955–6956Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 1994https://pubs.acs.org/doi/1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Degradation of Bacterial Poly(hydroxybutyric acid): Mechanisms from the Dependence of Pyrolysis Yields on Sample ThicknessRoy S. Lehrle and Robert J. WilliamsCite this: Macromolecules 1994, 27, 14, 3782–3789Publication Date (Print):July 1, 1994Publication History Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen tunneling in the activation of dioxygen by a tris(pyrazolyl)borate cobalt complexOlivia M. Reinaud and Klaus H. TheopoldCite this: J. Am. Chem. Soc. 1994, 116, 15, 6979–6980Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published…
Abstract During high temperature (150-300 degrees C) dolomitization experiments the rate of dolomitization increases with temperature, reactant surface area, reactant solubility, ionic strength and Mg (super 2+) /Ca (super 2+) of the solution. One would predict these results from simple kinetic theory. The discoveries…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical Transformations and Facile Disproportionation of Sulfur Dioxide on Transition Metal ComplexesGregory J. KubasCite this: Acc. Chem. Res. 1994, 27, 7, 183–190Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 19…