Materials Literature
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This paper reports the results of extensive examination of 15 kV and 22 kV polyethylene insulated cables which had been in service from less than one year to eleven years. The data presented are the results of the continuation of the investigation reported previously. This investigation of samples rermoved from servic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProton nuclear magnetic resonance and electron spin resonance investigation of the electronic structure and magnetic properties of synthetic low-spin ferric porphyrinsGerd N. La Mar and F. Ann. WalkerCite this: J. Am. Chem. Soc. 1973, 95, 6, 1782–1790Publication Date (Print)…
Experimental figures for the solid-liquid free energy, γSL, have been obtained for white phosphorus, for seven organic substances and for ice-water-sodium chloride systems having salt concentrations in the melt of 0 to 1 mol kg−1. The present work utilized observations made of grain-boundary grooves at solid-liquid in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of ligand and oxygen binding to cobalt protoporphyrin IX dimethyl ester in toluene solutionDennis V. Stynes, H. Cleary. Stynes, Brian R. James, and James A. IbersCite this: J. Am. Chem. Soc. 1973, 95, 6, 1796–1801Publication Date (Print):March 1, 1973Publicati…
Hydrogen-induced slow crack growth, da/dt, was studied in AISI-SAE 4130 low alloy steel in gaseous hydrogen and distilled water environments as a function of applied stress intensity, K, at various temperatures, hydrogen pressures, and alloy strength levels. At low values of K, da/dt was found to exhibit a strong expo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of ammonia in copper(II) Y-zeolitesYun-Yang Huang and E. F. VansantCite this: J. Phys. Chem. 1973, 77, 5, 663–667Publication Date (Print):March 1, 1973Publication History Published online1 May 2002Published inissue 1 March 1973https://pubs.acs.org/doi/10.1021/j100…
Abstract The dielectric constant ϵ′ and dielectric loss ϵ″ have been investigated for SBR samples vulcanized with TMTD and loaded with silica in increasing quantities in the frequency range from 60 Hz to 10 8 Hz at room temperature. Also, the physico‐mechanical properties of these samples have been investigated. The r…
Abstract A full field feature specific image analysis system has been developed for direct morphological characterization of carbon black in the electron microscope. The system provides quantitative size and non-dimensional shape information, as well as qualitative classification into specific shape categories using p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-temperature kinetics of pyrolytic graphite gasification by fluorine atoms and moleculesDaniel E. Rosner and Joseph P. StrakeyCite this: J. Phys. Chem. 1973, 77, 5, 690–699Publication Date (Print):March 1, 1973Publication History Published online1 May 2002Published iniss…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal degradation of naturally occurring materials. II. Products from the pyrolysis of triglycerides at 400.deg.Elizabeth Barr Higman, Irwin Schmeltz, Howard C. Higman, and Orestes T. ChortykCite this: J. Agric. Food Chem. 1973, 21, 2, 202–204Publication Date (Print):March…
It is well established that open-end yarns are different from ring yarns; in particular OE yarns are weaker and more bulky in spite of the higher twist levels used. The introduction of these yarns into woven fabric affects the structure and the characteristics of the fabrics. The fabric structure traps non-load bearin…
Some non-metallic crystals can have heat conductivities comparable with the best metals, while other non-metals are better heat insulators than most metallic alloys, and materials at both extremes have practical uses. The temperatures at which the conductivities of pure crystals are a maximum vary widely, and for any…
The present theories for in-vacuum gap conductance, hs, are compared to existing out-of-pile data. It is concluded that the Mikic theory which has not been previously applied to nuclear applications is most suitable for future development. The additional data necessary to estimate the transition pressure and to confir…
The metal-to-insulator transition in V2O3 is described by a model that is based on the electronic band structure of this material. The vanadium 3d-t 2g band decomposes in the trigonal symmetry into two bands, a 1g and e π. The a 1g band consists of orbitals connecting pairs of c-axis neighbouring atoms, while the e π…
Summary The residua system of chemical weathering is here defined as the chemical sink towards which the bulk of earth's surface materials (i.e. the silicate rocks) trend during weathering. Chemically the system is defined in terms of four major components, SiO 2 –Al 2 O 3 –Fe 2 O 3 –H 2 O, evidence being derived from…
Values for splittings of 3d, 4d and 5d bands in some metals in the range Z=29-93 have been derived from photoelectron energy distributions. Comparisons with free atom experimental and theoretical values are made and evidence for crystal field effects on the splittings presented.
Hydrogen environment embrittlement refers to metals stressed while exposed to a hydrogen atmosphere. Tested in air, even after exposure to hydrogen under pressure, this effect is not observed on similar specimens. Much high purity hydrogen is prepared by evaporation of liquid hydrogen, and thus has low levels for pote…
Abstract The causes of some of the differences in properties between compounded natural rubber and compounded synthetic poly (isoprene) have been traced to the insoluble non-rubber material in natural rubber. This material is mostly denatured proteins and is responsible for the higher modulus, faster scorch time, high…
The corrosion of mild steel in cultures of sulphate-reducing bacteria has been studied and in particular the effect on the corrosion rate of changing from an iron-rich to a minimal-iron growth medium in semi-continuous cultures. The results indicate that the ferrous sulphide produced by the bacteria is the major corro…
Abstract Measurements of the effect of hydrostatic pressure on the first order Raman frequencies of Se and Te are reported. All the frequencies of the Raman active modes decrease with pressure. The valence force field model proposed by Nakayama and Odajima is used to explain this behaviour.