Materials Literature
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Studies were made by X-ray diffraction method on the scales formed on the surfaces of Ni-Cr-Ti, Ni-Cr-Nb and Ni-Cr-W alloys. The following results have been obtained. (1) NiOTiO2 was formed in the scales of Ni-20Cr-1Ti alloy at temperatures above 1100°C, and in those of Ni-20Cr-2Ti alloy above 1000°C. NiO, NiOTiO2, Cr…
Article Stickstofllegierungen der I-Metalle Mangan, Eisen, Kobalt und Nickel mit Gallium, Germanium, Indium und Zinn was published on January 1, 1962 in the journal International Journal of Materials Research (volume 53, issue 1).
The influence of 475°C embrittlement of high chromium ferritic steels on their corrosion resistance was studied mainly by potentiostatic technics and the mechanism of the 475°C embrittlement process was considered. The results obtained are summarized as follows:(1) The materials aged at 475°C do not lose their corrosi…
The deterioration of the insulation in high-voltage turbo-generator stators can be followed by means of non-destructive tests. The relative merits of the available methods of testing stator insulation are given, but at present a single test will not reliably indicate the insulation condition. The detection of discharg…
moglich, iiber die Existenz zweier neuer Modifikationen zu berichten und deren Strukturen zu beschreiben. Die eine ist hexagonal vom Typ des CeP04. t H20, die andere eine monokline Hochtemperaturform, die sich bei gewohnlicher Tem-peratur sehr langsam in den Monazit-Typ umwandelt. Die hexagonale Struktur wurde aus vVe…
The oxidation reaction of zirconium in air was studied in the temperature range 650°∼850°C. The reaction was followed up by measurements of weight change, chemical analyses of nitrogen absorbed in the oxidized specimens, and electron microscopic observations of the surface and cross-section of specimens. Above 750°C,…
M. R. Everett and G. E. Thompson, Analyst, 1962, 87, 515 DOI: 10.1039/AN9628700515
High-temperature, gas-cooled, graphite-moderated reactors of the type represented by the HTGR feature a continuous removal of volatile fission products by, and their subsequent trapping from, a helium purge stream. Cesium is a volatile fission product of considerable interest; therefore, an investigation of the specif…
Fifty-four kimberlite pipes and dykes cut Precambrian granite in the Singida region of Tanganyika. The pipes range from 60 to 2500 feet in diameter, and occur in clusters and lines. The lines follow fracture zones. In addition to intrusive kimberlite, the pipes contain massive to stratified kimberlite tuff and sedimen…
Abstract Strontium phosphate precipitates were formed by mixing different amounts of Sr(OH) 2 and H 3 PO 4 . A solubility diagram was prepared from the analysis of the supernatant in equilibrium with the precipitate. X‐ray diffraction patterns indicated that there were two compounds, SrHPO 4 and Sr 10 (PO) 6 (OH) 2 .…
D. H. Brown, J. Chem. Soc., 1962, 4408 DOI: 10.1039/JR9620004408
Abstract Die Umsetzung von TiN mit HCl, bei der H 2 , N 2 und die gasförmigen Chloride TiCl 4 , TiCl 3 und TiCl 2 nebeneinander entstehen, verläuft oberhalb 1300°C hinreichend schnell und reversibel, so daß sie den chemischen Transport von TiN im Temperaturgefälle ermöglicht. Im Zusammenhang hiermit wurde eine Arbeits…
Skeletal muscle, teased into strips several millimeters long and 1 mm or less thick, is fixed in a 3:1 mixture of lemon juice and formic acid until transparent. The tissue is compressed between folds of absorbent material to remove excess fixative and impregnated for 10 min in a volume of 1% gold chloride equal to the…
Principles of Taxonomy, especially pertaining to the Algae are discussed at length. Though primarily based on morphology, other criteria, such as reproduction and life history flagellation, cytological details, pigmentation, nature of metabolic products, etc., play a distinct and sometimes a significant role at differ…
M. R. Truter, J. Chem. Soc., 1962, 3393 DOI: 10.1039/JR9620003393
R. M. Barrer and D. J. Ruzicka, Trans. Faraday Soc., 1962, 58, 2253 DOI: 10.1039/TF9625802253
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.