Materials Literature
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Presence of H2S in a carburizing atmosphere causes S-adsorption which retards carbon transfer and deposition and can suppress metal dusting of iron and steels. In the latter process cementite Fe3C is an intermediate, graphite deposition would initiate its decomposition but graphite nucleation is prevented by adsorbed…
Abstract The title complex, [Co(odmbpc)], which is a single isomer and is highly soluble in common organic solvents, has been prepared and investigated electrochemically and spectroelectrochemically in dichloromethane solutions. The cyclic voltammograms of this complex at a concentration of ca. 6 × 10−5 mol dm−3 exhib…
Corrosion inhibition of SAE 1018 steel by Pseudomonas fragi and Escherichia coli biofilms has been evaluated using batch cultures in rich medium (LB) and seawater-mimicking medium (VNSS) at 23 degrees C and 30 degrees C with or without daily medium replenishment. Biofilm components have been stained simultaneously for…
Electric field induced ion drift processes in alkali‐borosilicate glasses play a key role in the silicon‐glass or metal‐glass compound formation in anodic bonding processes. By means of ex situ and in situ ion‐beam analysis, which allows a quantitative depth profiling of different elements, the formation of anodic, al…
The transcripts of structurally related cellobiohydrolase genes in Phanerochaete chrysosporium-colonized wood chips were quantified. The transcript patterns obtained were dramatically different from the transcript patterns obtained previously in defined media. Cellobiose dehydrogenase transcripts were also detected, w…
Microstructural changes in yttria‐stabilized zirconia with aging were investigated by X‐ray diffraction, high resolution transmission electron microscopy (TEM), energy dispersive X‐ray spectroscopy under TEM, and electron diffraction. First, various microstructural changes reported in the literature as the causes of t…
Hydrogenated diamondlike carbon (DLC) and fluorine containing DLC (FDLC) were investigated for their potential applications as low k dielectrics for the back end of the line interconnect structures in ultralarge scale integrated circuits. It was found that the dielectric constant ( k ) of DLC can be varied between <2.…
In a previous report we demonstrated that the blood compatibility of poly(ether urethane) (PEU) was improved by grafting phosphorylcholine (PC) groups on the surface. The improved blood compatibility was indicated by decreased platelet adsorption/activation and reduced thrombin formation at the polymer surface in expe…
A new chain ferroelectric random access memory-a chain FRAM-has been proposed. A memory cell consists of parallel connection of one transistor and one ferroelectric capacitor, and one memory cell block consists of plural memory cells connected in series and a block selecting transistor. This configuration realizes the…
Monodisperse, spherical organo‐silica powders were synthesized from an immiscible mixture of an aqueous NH 4 OH solution and organo‐alkoxysilanes, such as phenyl‐trimethoxysilane (PTMS), methyltrimethoxysilane (MTMS), and methyltriethoxysilane (MTES). When the organo‐alkoxysilanes were added to the aqueous NH 4 OH sol…
We report Monte Carlo results for the two-dimensional hard-disk system. Simulations were performed in the NVT ensemble with up to 65 536 disks, using a new updating scheme. We analyze the bond orientational order parameter and correlation length in the isotropic phase and the scaling behaviour of the bond orientationa…
We report the systematic comparison of the optical emission intensity of the vibrational band of the Swan system with the absolute concentration in and microwave plasmas used in the deposition of nanocrystalline diamond. The absolute concentration is obtained using white-light absorption spectroscopy. Emission intensi…
One explanation of the Hall-Petch relationship is that dislocation pile-ups serve to enhance the stress felt at grain boundaries. This dislocation pile-up model results in a d −½ dependence of the yield strength, with d the grain size. In fact, this dependence is observed often. However, the traditional pile-up pictur…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTLigand Design Approach for Securing Robust Oxidation CatalystsColin P. Horwitz, David R. Fooksman, Leonard D. Vuocolo, Scott W. Gordon-Wylie, Nathaniel J. Cox, and Terrence J. CollinsView Author Information Department of Chemistry, Carnegie Mellon University 4400 Fifth…
This article gives an overview of fabrication and performance of a class of vacuum microelectronic devices, namely, silicon tip-on-post field emitter arrays (FEAs). Experimental data illustrating the device performance are presented in the context of requirements for field emission flat panel display and microwave pow…
Granular flow of comminuted ceramics governs the resistance for penetration of ceramic armor under impact. To understand the mechanism of the granular flow, silicon carbide was subjected to high-strain, high-strain-rate deformation by radial symmetric collapse of a thick-walled cylinder by explosive. The deformation,…
We present results of a study of possible magnetic ordering in the icosahedral phase of Tb-Mg-Zn probed by bulk magnetization measurements and neutron diffraction. Measurements on both crushed single grains and cast polycrystalline samples of Tb-Mg-Zn were performed. Magnetization measurements on both samples reveal o…
We investigate the magnitude of density jumps across phase transitions in soft-matter systems composed of macromolecular particles, like star polymers or colloidal suspensions. The standard route to predict phase transformations is to start from an effective interaction potential between these macroparticles and map t…
We report on detailed Hall-effect measurements of thin films of ${\mathrm{La}}_{0.67}{\mathrm{Ca}}_{0.33}{\mathrm{MnO}}_{3}$ above and below the metal-insulator transition. In the metallic ferromagnetic regime, we find a temperature-independent holelike nominal charge-carrier density ${n}_{h}^{*}=1.3$ per unit cell, c…
To satisfy the electrical and thermomechanical requirements for a continuous wave millimeter wave beam transmission, a window assembly using a large size synthesized diamond disk has been developed. Such window systems are needed as a vacuum barrier and tritium shielding in future electron cyclotron heating systems fo…