Materials Literature
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The results of an electrochemical investigation of the corrosion behavior of reactor structural materials determined both in and out of reactor are presented. Electrochemical kinetic measurements in and out of reactor were fairly difficult to obtain because of the high purity (and associated poor conductivity) of the…
Electromigration in 525 AA Au films has been studied by transmission electron microscopy during the actual passage of current. The effects of electromigration were the growth of voids near the cathode end and the growth of hillocks near the anode end of the test strip. The hillocks were rounded in shape with heights u…
Blends were prepared with high-modulus “filler polymers,” polystyrene, polyamide, and poly(methyl methacrylate) dispersed in a low modulus matrix of ethylene/vinyl acetate copolymer. The modified Kerner equation was applied to dynamic mechanical data obtained on these blends, which may be considered to be model system…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of silane hydride anion (SiH5-) and model studies of inter- and intramolecular exchange in pentacoordinate silicon species. Ab initio investigationDouglas L. Wilhite and Leonard. SpialterCite this: J. Am. Chem. Soc. 1973, 95, 7, 2100–2104Publication Date…
We have undertaken a theoretical study of the effect of magnetoelastic interactions on ferromagnetic resonance in thin films as a possible mechanism for an appreciable anisotropy in resonance linewidth. This study is based on a formalism developed by Tiersten, which is exact within the framework of the quasistatic app…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactivities of polystyrene and polypropylene toward tert-butoxy radicalEtsuo Niki and Yoshio KamiyaCite this: J. Org. Chem. 1973, 38, 7, 1403–1406Publication Date (Print):April 1, 1973Publication History Published online1 May 2002Published inissue 1 April 1973https://pubs.a…
Self-association by hydrogen bonding in the case ot pyrrole was studied by i.r. spectroscopic methods. The fundamental first and second overtones of the NH stretching vibration were measured at different concentrations and at temperatures ranging from 22 to −190 °C. The existence of at least two associated species in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTESCA [x-ray photoelectron spectroscopic] study of the sulfur-nitrogen bond in sulfimidesCraig E. Mixan and Joseph B. LambertCite this: J. Org. Chem. 1973, 38, 7, 1350–1353Publication Date (Print):April 1, 1973Publication History Published online1 May 2002Published inissue 1…
Two silicon carbides with different fracture surface energies were subjected to increasingly severe thermal shock; the damage was monitored by changes in the specific damping capacity, elastic modulus, and fracture strength. The fracture strength followed predicted trends, but the strength losses did not correlate wit…
The developing mechanisms of the positive and negative corona streamers on the insulation surface have been studied by using the Dust figure technique together with a line pulser. The present method has the advantage of measuring the velocity of corona discharge development and the discharge mechanism, because the dis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinuclear complex of 1.5 valent nickelD. Gatteschi, C. Mealli, and L. SacconiCite this: J. Am. Chem. Soc. 1973, 95, 8, 2736–2738Publication Date (Print):April 1, 1973Publication History Published online1 May 2002Published inissue 1 April 1973https://pubs.acs.org/doi/10.1021/…
The phase equilibrium relationships of several vanadate systems have been studied by a combination of differential thermal analysis (DTA) and X-ray powder diffraction methods. All systems studied were eutectic in nature. The liquidus temperatures of the sodium vanadates were found to depend on the oxygen partial press…
Several salts containing the Mo(CN)_7^(4-) ion have been studied by a variety of spectroscopic and magnetic techniques. Infrared and Raman spectral data together with magnetic susceptibility measurements suggest a pentagonal-bipyramidal (D_(Sh)) structure (2E_1"-(e_1")^3 ground state) for Mo(CN)_7^(4-) in aqueous solu…
Thermal expansion measurements were made on f.c.c. Fe-Ni and Ni-Cu alloys from liquid helium temperature up to 1000 K. The spontaneous volume magnetostriction of these alloys at 0 K evaluated from their thermal expansion curves can be quantitatively explained on the basis of the collective electron model, using the de…
Matting agents, flatting agents or gloss control additives are introduced into surface coatings to produce finishes with reduced gloss and light reflection. The old method of obtaining a matt surface with a powdered abrasive or sandpaper is time consuming and inconvenient; the use of matting agents on a wide variety o…
The sound velocities in BaTiO 3 has been observed near its paraelectric to ferroelectric phase transition point. The anomalous part of the sound velocity of the longitudinal wave propagating along [100] direction depends on temperature as A [( T - T 0 )/ T 0 ] -ζ with ζ=0.41 and A =1.79×10 4 cm·sec -1 where T 0 is the…
A photogrammetric technique is described, which allows simple and accurate measurements of surface microgeometry with a scanning electron microscope. Simple working formulae are obtained with a proper choice of the reference axes. The error evaluation is performed for an elementary case.
p-type semiconducting diamond was grown by vapor deposition from a 0.83% diborane in methane gas mixture at 1050°C and 0.2 Torr on 0 to 1-μ nominal size natural type-I diamond powder. Total mass increases of about 9% were achieved which correspond to average linear growth rates of less than 10−3 μ/day. Evidence showin…
Abstract A cytosolic thiolase, presumably involved in hepatic cholesterogenesis, has been purified to homogeneity from avian liver. This enzyme is the predominant acetoacetyl-CoA thiolase of chicken liver comprising 70% of the total thiolase activity in laying hens. In addition to the cytosolic enzyme, two mitochondri…
Abstract It, is suggested that a ferroelectric phase transition could be triggered by an instability of the crystal with respect to another phase transition parameter η. The spontaneous polarization P and spontaneous η may occur either successively or simultaneously (at the same temperature), the latter case being alw…