Materials Literature
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Stress corrosion cracking behavior of SUS 304 and SUS 316 stainless steels was investigated in terms of concentration and temperature of MgCl2 solutions with or without dissolved oxygen. The potential-MgCl2concentration relation between SCC and pitting corrosion was also studied by constant potential method under the…
The coordinates of a three‐fold coordinated random network model containing 533 atoms, and constructed to simulate the structure of amorphous As, have been computer refined by moving atoms in an iterative scheme (i) to minimize the variations in the nearest neighbor bond length, (ii) to relax the structure to one of l…
Rotation structure of (0,0) bands of the (C-X)3/2 and (G-X)3/2 systems of SnF molecule has been photographed in the third order of a 10.6 meter concave grating spectrograph. The rotation constants, as determined from the analysis, have been reported to be:-
A potassium requirement for growth can be readily demonstrated in the autotrophic blue-green bacterium Anacystis nidulans strain TX20 equivalent to 0.7% of the cellular dry weight. Starvation of this organism for potassium partially dissociates growth from cell division, thereby inducing 50% of the population to form…
Corrosion inhibitors for metals were classified into three general types, oxidation, deposition, and adsorption ones. Mechanisms of corrosion inhibition with these types of inhibitors were explained by using polarization curves. Applications of the inhibitors in aerated neutral solutions, acid and basic media, oil-con…
This paper reviews the status of selected tritium processing and containment technologies that will be required to support the development of the fusion energy program. Considered in order are the fuel conditioning and recycle systems, the containment and cleanup systems, the blanket processing systems, and two unique…
A new, oxygen‐stabilized intermetallic compound was identified in sintered, pre‐alloyed rare‐earth iron powder samples. Its composition corresponds to formula R12Fe32O2 and its crystal structure belongs to space group Im3m. The presence of these compounds has been observed, so far, in several R‐Fe‐O systems, with R=Gd…
This paper contains an exact solution for the stresses arising in an infinite elastic plate having a symmetrically located spherical cavity and subjected to uniaxial tension. The problem of stress analysis in a plate with a spherical cavity was investigated by several authors. But their solutions were all for the prob…
Abstract Two different techniques are used to establish the strain distributions near the domain walls in ferroelastic-ferro-electric crystals (KDP, GMO, TAN ANE); classical optical techniques can give some results for domain structures not far from the monodomain state; γ-ray diffractometry is useful for dense domain…
A preliminary design study has been conducted for constructing a 200 KeV scanning proton microprobe which utilizes the phenomenon of field ionization in hydrogen gas to create a proton source of extremely small dimensions and high "brightness." Calculations for the focusing action of a non-uniformly graded acceleratin…
We discuss theoretically the analog of the Helfrich-Hurault instability for a smectic cylinder (as opposed to the usual case of a flat slab). The smectic layers are initially in a ideal concentric cylinder conformation. It is then assumed that (using for instance a temperature pulse of adequate sign) the layers are pu…
The hollow glass micro-sphere named “Shirasu-balloons” can be produced from the Shirasu, which is a kind of acidic volcanic ejecta. Shirasu-balloons has fewer partition bubbles and shows different surface state, compared with the “perlite” which can be produced from obsidian and perlite, which are the other kinds of v…
Experimental data on the ordinary and extraordinary Hall effect observed in the 3d ferromagnetic metals iron, nickel and cobalt is reviewed. Emphasis is placed on data and analysis applicable to the high‐field limit obtained at low temperatures and high magnetic fields. Complete data on iron single crystals in the ran…
The development of the organic metallic state is traced from our original synthesis and study of TTF-TCNQ to the new conductor HMTSF-TCNQ, the first organic substance which remains metallic as T → 0.
The temperature dependence of the anisotropy constants of some hexagonal ferrites is analyzed on the basis of the Callen and Callen model applied to the different sublattices whose magnetizations are taken from Mössbauer data. The analysis allows clarification of the role of the different mechanisms which cause the an…
The development of shearing stress after onset of steady shear flow has been measured for concentrated solutions in chlorinated biphenyl of monodisperse polystyrenes (M=2.75×105 and 1.53×106) and their blends. The effect of molecular weight distribution on the transient behavior has been discussed on the basis of expe…
As a part of the study on sintering reactions, the thermal decomposition process of La(OH)3 was investigated by using T.G.A., D.T.A. and X-ray diffraction method. From the results thus obtained, the detailed mechanism of the decomposition was inferred.(1) The thermo-gravimetric curves of specimens were obtained in air…
Isopempto- and isochlorocruoro-porphyrin dimethyl esters have been prepared by application of the MacDonald porphyrin synthesis. The vinyl group was introduced by elimination of hydrogen chloride from chloroethyl side-chains carried through from an intermediate pyrrole, and the formyl group (of isochlorocruoroporphyri…
New SI units for ionizing radiations have been recommended by the internation Commission on Radiation Units and Measurements (ICRU). These are the becquerel (symbol Bq), equal to the second to the power -1, and the gray (symbol Gy), equal to the joule per kilogram. It was recommended that the roentgen be replaced as t…
Hexanedioic acid (Adipic acid) precipitation from aqueous solution at 25 °C was followed thermometrically. The precipitation was preceded by a long induction period, where no precipitate was observed; more than half of the total possible precipitate formed during the following period of the same length. The rate of pr…