Materials Literature
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The ThMn12-type Fe78Mo10Sm12 magnet has been characterized by high-resolution electron microscopy, x-ray microanalysis, and microdiffraction. In general, the microstructure of the mechanically alloyed and annealed magnets consists of the tetragonal 1:12 matrix phase with an average matrix grain diameter of 200–300 nm…
Oxidation of formaldehyde over supported platinum catalyst produced CO2 as a major product and CO as a minor product under a wide range of Inlet concentrations and reaction temperatures. The temporal variation of CO yield proceeded through a maximum suggesting that it was produced as an intermediate in the pathway lea…
Abstract A unified system of projection of chemical composition, prepared initially for micas and chlorites, has been applied to minerals of the serpentine-kaolinite group. It has been shown that the chemical composition in the projection field is controlled by the formula, the unit of which is: (Si (2- x ) Al x )O 5…
X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), and low-energy electron diffraction (LEED) have been used to study the polar (111)Cd and (111)Te surfaces of intrinsic CdTe crystals. Complementary information on surface composition, chemical state of the surface elements, and surface structur…
The long term aging behaviour of a large number of Mo bearing and Mo free heats of cast duplex stainless steels has been studied between 300 and 450°C in terms of hardness and impact Charpy toughness. The results demonstrate the importance of the ferrite, Cr, and Mo contents in controlling aging response. Owing to the…
Abstract The crystal structure of the kaolinite mineral from Kalabsha, Aswan, Egypt, has been investigated with a two‐step procedure of the X‐ray powder pattern‐fitting. The unit cell is found to be triclinic, P1, a = 5.1577(15), b = 8.9417(23), c = 7.3967(40) Å, α = 91.672(5)°, β = 104.860(2) and γ = 89.898(2)°. The…
Metallic Sr 0.95 NbO 3 − δ is stable under normal electrochemical operation in 2.5 M H 2 SO 4 . It is, for practical purposes, inactive for fuel‐cell reactions and oxygen evolution, but it is active for the hydrogen‐evolution reaction with an exchange‐current density of 4.37 × 10 − 5 A cm − 2 at 60°C. An anomalous ano…
Abstract Many measurements have been made of the strength of simple vulcanizates of common elastomers, both under steady and intermittently applied loads. In both cases, the strength is governed by dissipative processes, particularly those arising from internal molecular motions and from stress-induced crystallization…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and circular dichroic and photoresponsive properties of a graft copolymer containing an azoaromatic polypeptide branch and its membraneMasato Aoyama, Akira Youda, Jun Watanabe, and Shohei InoueCite this: Macromolecules 1990, 23, 5, 1458–1463Publication Date (Print)…
The energy of formation of salt linkages between Arg or Lys with Asp or Glu in a polypeptide chain having the collagen fold have been estimated using the fully empirical energy minimization scheme AMBER. The polypeptide was considered both in an isolated and a hydrated triple helical state. The collagen fold associate…
Selection rules are derived for delimiting boundaries in the structural unit model of high-angle grain boundary structure. The rules arise from the condition that the structural units fit compatibly together in the boundary plane. Rules are given for pure twist, pure tilt and mixed tilt and twist trajectories in the f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic states of chrysene: linear and magnetic circular dichroism and quantum chemical calculationsJens. Spanget-Larsen, Jacek. Waluk, and Erik W. ThulstrupCite this: J. Phys. Chem. 1990, 94, 5, 1800–1806Publication Date (Print):March 1, 1990Publication History Published…
Outgassing characteristics of an electropolished stainless steel (304) pipe wall were investigated by an isolation method. The free outgassing rate after an in situ bakeout (150 °C, 20 h) was estimated as low as 1.6×10−12 Pa ℓ s−1cm−2. After the in situ bakeout, H2 molecules were steadily evolved from the pipe wall, w…
Polymer films containing nematic liquid crystal microdroplets are useful for light modulation devices. Light scattering in these films is controlled by applied electric fields. These films were produced by cooling solutions of polymer in the isotropic phase of liquid crystal to temperatures below the clearing point (t…
Problem 12 of the TEAM (Testing Electromagnetic Analysis Methods) Workshops for Eddy Current Code Comparison is a cantilever beam in crossed steady and time‐varying magnetic fields. A total of six solutions to this coupled problem are described and compared with experimental results. Most solutions treated the electro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganosiloxyphosphazene polymers: synthesis via aminosiloxane reagentsHarry R. Allcock and William D. CoggioCite this: Macromolecules 1990, 23, 6, 1626–1635Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 March 1990https…
Zirconia‐toughened alumina (Al 2 O 3 –15 vol% Y‐PSZ (3 mol% Y 2 O 3 )) reinforced with 10 vol% silicon carbide whiskers (ZTA‐10SiC w ) ceramic matrix composite has been characterized with respect to its room‐temperature mechanical properties, thermal shock resistance, and thermal stability at temperatures above 1073 K…
The three different force-calculating methods based on magnetic field analysis using the finite-element method are evaluated using a fundamental model, which is constructed with permanent magnets and iron plates. The magnetic force for the model is calculated by Maxwell's stress tensor method, the virtual work method,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation of the structure, vibrational spectra, and polarizability of boroxine, H3B3O3, a model for boroxol rings in vitreous B2O3J. A. Tossell and Paolo. LazzerettiCite this: J. Phys. Chem. 1990, 94, 5, 1723–1724Publication Date (Print):March 1, 1990Publication History P…
The continuing development of the textile and clothing manufacturing industries depends in no small measure on the successful implementation of reliable objective methods for the specification, prediction and control of fabric quality and performance attributes. In the last decade, we have seen several notable example…