Materials Literature
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Abstract Es werden die RAMAN‐Spektren von Alkalisalzen der Peroxodischwefelsäure in wäßriger Lösung und im festen Zustand aufgenommen und die Ultrarotspektren im festen Zustand gemessen. Die gefundenen Frequenzen werden den einzelnen Schwingungsformen zugeordnet. Die Auswertung der Spektren im Hinblick auf die Struktu…
An investigation is reported on the oxidation of an iron‐5% chromium alloy over the temperature range 600°–850°C. The film on abraded specimens underwent transformation by nodular‐type growths to produce a scale containing iron chromite and ferric‐chromic oxide. The alloy underlying iron chromite was susceptible to in…
It has been discovered that the formation of the butterfly twin in barium titanate depends on both the average particle size and the particle‐size distribution of the starting material. Maximum twin yields occur when the particles have an average size near 1μ with a rather sharp cutoff in the distribution in the large…
The measured characteristics (pressure-voltage, current-voltage, and efficiency) of an ion drag pump using razor edge emitters are reported and comparisons made with theory. The advantages of this pump over one using corona point emitters are discussed.
The authors studied theoretically the behavior of fiber bundles as they are delivered from the front rolls of a ring spinning frame and twisted. The causes of the long-term twist irregularity found in some yarns and their effects on yarn properties have been analyzed.
Abstract not Available.
Abstract A one‐electron theory of the scattering of electrons from infinitely extended stacking faults in f. c. c. metals is given for an arbitrarily shaped Fermi surface. The corresponding linearised transport problem is then solved without approximation. The wave functions are represented by expansions in terms of W…
Abstract
The effect of material variables on the fatigue life of AISI 52100 steel in ball bearings is examined. An apparently significant negative correlation with the abundance of certain trace alloying elements has been found. An effect of gas content has not been proven. Some difference in the endurance of bearings tempered…
Epiphytic diatoms found upon various sea-weeds collected from the Japanese coast were examined. Thirty-two diatoms, which seem to be main members of the epiphytic communities, are specified in this report.
Abstract From pole figure data, the orientation of a crystallographic direction R in any reference direction Q in a sample can be quantitatively expressed by the average <cos 2 σ>, where σ is the angle between Q and R in a crystal. In general, <cos 2 σ> can be evaluated in terms of the experimental average…
W. S. Holmes, Trans. Faraday Soc., 1962, 58, 1916 DOI: 10.1039/TF9625801916
Abstract Grundite‐illite was treated with NaBPh 4 solutions at 25° C. for various periods of time to determine the amount of K that can be removed, the rate of K removal and the effect of this treatment on the properties of the mineral. Only the first 30 me. K per 100 g. were removed from <20µ illite at a rate that…
Abstract During the course of study on the synthesis of polyanhydrides from aromatic and aliphatic dibasic acids, various types of five‐membered heterocyclic polyanhydrides was investigated. As starting materials the five‐membered heterocyclic dibasic acids, furan‐2,5‐di‐β‐propionic acid, tetrahydrofuran‐2,5‐di‐β‐prop…
The heats of reaction of normal-, iso-, and secondary-butyl alcohols reacting with phenyl isocyanate, the three tolyl isocyanates, and 2,4-tolylene diisocyanate were measured at 25 °C, using a differential calorimeter of the Tian–Calvet type. The results are interpreted in terms of substituent effects.From bond energy…
The exchange current, Tafel slope, stoichiometric number, and limiting anodic current of the hydrogen reaction on nickel in 0.1 N NaOH depend on the pretreatment and the polarization history of the electrodes. The discharge step of the Volmer‐Tafel mechanism is rate‐determining on surfaces characterized by high fracti…
The effects on the corrosion of copper, under the influence of dissolved oxygen and carbon dioxide, of trace additions of salts have been studied. In the case of chloride ion, radical changes in the kinetics of dissolution and film growth processes have been observed and have been interpreted in terms of a transition…
P. G. Ashmore and M. G. Burnett, Trans. Faraday Soc., 1962, 58, 253 DOI: 10.1039/TF9625800253
The infrared spectra of polyatomic ions in dilute solid solution reflect interactions of the vibrational modes with the lattice environment. The spectra are usually characterized by very narrow bandwidths, and by frequency shifts and changes in absorption intensities which depend upon the host lattice. We have examine…
The oxidation of silicon by high‐pressure steam was studied at temperatures between 773° and 1123°K and pressures from 25 to 500 atm. Within a certain range of pressure and temperature a uniform film of amorphous silicon dioxide forms. At moderate pressures the film growth is linear in time and directly proportional t…