A semi-empirical method for calculating activation energies
J. N. Bradley, Chem. Commun. (London), 1966, 175 DOI: 10.1039/C19660000175
Materials Literature
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A Note on the Tempering Behavior of a Ti-9wt% Ta Alloy Quenched from β Region
Changes in dislocation arrangement and twin faults formation by quenching and tempering of a Ti-9% Ta alloy were investigated by means of internal friction measurements and transmission electron microscopy. It has been found that typical needle-like martensite structures were produced by quenching from the β region, a…
Forme rhomboédrique des métaphosphates du type (PO3)3MIIK (MII = Co, Ni, Mg, Zn)
Durif-Varambon André, Grenier Jean-Claude, Averbuch-Pouchot Marie-Thérèse, Tranqui Duc. Forme rhomboédrique des métaphosphates du type (PO3)3MIIK (MII = Co, Ni, Mg, Zn). In: Bulletin de la Société française de Minéralogie et de Cristallographie, volume 89, 2, 1966. pp. 273-274.
Caractérisation des minéraux kaoliniques par diverses techniques
Identification of kaolin minerals by D.T.A., X-ray diffraction, electron microscopy is sometimes unfeasible, mainly as far as low -crystallized forms are concerned. It can be the case with fire-clay, metahalloysite or intermediate forms. Infrared spectroscopy in the OH vibration band and Al-O-H deformation band region…
Studies of the polyanions by Glauber-salt cryoscopy. Part I. Polyanions of tungsten
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Oxide Inclusions Formed in the Steels of Fe-Cr-O System
The imjJortance oj inclusions in steel has been velY milch ellljJhasi;:ed, and many investigations have been carried out, but in most cases too 1Ilalry variables have been jJresented to draw wry definite conclusion.
Curling of crystals of 2,5-di-t-butyl-1,4-dimethoxybenzene during growth
A further study has been made of the curling during growth of thin crystal plates of 2,5-di-t-butyl-1,4-dimethoxybenzene, and this behaviour has been related to the approximate structure of the compound deduced from its optical properties. It is suggested that the curling may be due to differential adsorption of the s…
Absorption Spectra of Mn2+Ion in Glasses
Absorption spectra of Mn2+ ion in alumino-boro-phosphate, magnesium-aluminoborate and soda-lime-silica glasses were studied within the range, 16000 cm-1 30000 cm-1 Five absorption bands were observed at or around 19200 cm-1 [4Γ4(G)], 23300 cm-1 [4Γ5(G)], 24000 cm-1 [4Γ3,4Γ1 (G)], 28100 cm-1 [4Γ5 (D)] and 29300 cm-1 [4…
Physicochemical studies of some cyclic carbonates. Part IV. A redetermination of the rates of alkaline hydrolysis of ethylene and propylene carbonates
By means of high-frequency conductance measurements, the rates of the alkaline hydrolyses of ethylene and propylene carbonates have been determined at 15, 25, and 35°. The rate constants found are considerably greater than those previously reported, and a source of error in the earlier determinations is discussed. The…
On the Aging Process of Cu-Cr Alloys
The processes of precipitation in Cu-Cr binary alloys with 0.05∼0.91 wt%Cr have been investigated by electrical resistivity, hardness and transmission electron microscopy, with the following results: (1) Increase in electrical resistivity due to clustering of solute atoms or zone formation is not detected at above/300…
Néoformation et dégradation des minéraux argileux dans certains solonetz solodisés et vertisols du Tchad
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Anisotropy of the Static Friction of Plain-woven Filament Fabrics
The relationship between the geometrical structures of plain-woven filament fabrics and the directional effect of fabric-on-fabric static friction has been investigated with the following results:(1) Frictional force F per unit area for every relative direction of rubbing is related to pressure N by the relation F=kNn…
Resistance Heated Crystal Puller for Operation at 2000°C
A resistance heated crystal puller has been used to grow crystals of NbO, Ti2O3, and Al2O3, which have melting points of 1945, 2000, and 2050°C, respectively. The puller incorporates a modified version of a tantalum tube furnace described previously, which is capable of operating in oxidizing, neutral, and reducing at…
Constituents of Asclepiadaceae Plants. XVII. Components of Cynanchum wilfordi HEMSLEY
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Plastic Behavior of Metals at Cryogenic Temperatures
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Magnetic Properties of Eu3O4
Abstract A new Eu 3 O 4 preparation method is described. Eu 3 O 4 is produced by the solid state reaction between Eu and Eu 2 O 3 . Static magnetic susceptibility measurements were made by the Faraday method from 6 to 300°K. Eu 3 O 4 was found to be ferrimagnetic with a Curie point of 77 °K.
Rectangular waveguides loaded with magnetised ferrite, and the so-called thermodynamic paradox
The so-called thermodynamic paradox associated with a ferrite-loaded rectangular waveguide is discussed. It is shown that the various structures introduced by some authors to resolve the paradox are, even in the limit case, different structures from the original one leading to the paradox, and therefore they do not he…
Parent Material‐Clay Relations in Some Northern Utah Soils
Abstract It is frequently stated that soils with well‐developed A and B horizons are sufficiently weathered that their clays will reflect strongly the influence of the climatic environment. Studies of three profiles developed from sedimentary rock materials in northern Utah show a high association between parent mater…
Polymeric methylsilazanes
Abstract
Plastic deformation of diamond at temperatures below 1800°c
The plastic deformation of type II diamond plates has been examined by three-point loading at temperatures between 1700 and 1550°c. Plastic bending was produced at 1700°c but the degree of bending at a particular stress was less than with experiments at 1800°c which have been reported. No plastic deformation was detec…