Materials Literature
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Strong experimental evidence is obtained that the maximum observed in the temperature dependence of the flow stress of copper alloys is a dislocation inertial effect. By using the superconducting effect in lead as a key, it is found that the maximum occurs when dislocations become critically damped.
In a time of growing need for catalysts, perovskites have been rediscovered as a family of catalysts of such great diversity that a broad spectrum of scientific disciplines have been brought to bear in their study and application. Because of the wide range of ions and valences which this simple structure can accommoda…
Guard hairs from normal mink and from normal and defective areas of mink pelts with “singe” or “red hip” abnormalities were studied with the scanning electron microscope (SEM). The surface or cuticle of normal guard hair consists of scales overlapping each other. These cuticle cells show regional variation in shape an…
Definition der Abreißbedingung durch das Kräftegleichgewicht am Flüssigkeitswulst. Messung der Gasgeschwindigkeit und der gasseitigen Grenzschichtdicke im Eindellungskrater. Daraus Berechnung der Reibungskraft sowie Berechnung der Schwerkraft und der Trägheitskraft. Ermittlung des kritischen Blaszustandes für den Begi…
In industrial electrostatic spray coating operations, liquid paint is applied to substrates of varying electrical characteristics. In many cases a metal substrate is chemically pretreated and/or primed prior to electrostatic spraying. A previously rejected part may have already received a number of thoroughly cured to…
The effect of γ-irradiation at room temperature on MgO powder samples has been investigated by thermoluminescence (TL) methods. In addition to a TL peak at 516 K, 'persistent' changes in the properties of lower temperature TL peaks have been observed in the irradiated samples. This includes mainly an increase in the s…
Effect of hydrostatic pressure on the ferroelectric phase transitions in glycine silver nitrate (NH 2 CH 2 COOH·AgNO 3 ; GSN) and its deuterated analogue(DGSN) was studied by means of dielectric measurements. The Curie temperatures decrease with increasing pressure by a relation T c = T c 0 + K p +γ p 2 . Parameters T…
1. Time resolved birefringence measurements reveal complex structural changes in rod outer segments following a bleaching flash. 2. The detailed character of the observed changes depends upon osmotic integrity of the outer segment envelope membrane. Rod outer segments with intact envelope membranes show a fast initial…
Abstract The atmospheric corrosion of a mild steel (0.09 C) has been studied in flowing atmospheres containing 1, 10 and 100ppm SO 2 at 80, 85, 90 and 96% relative humidity. The flow rate was varied to give SO 2 ‐supplies ranging between 0.4 and 250 μg SO 2 cm −2 h −1 . After an exposure period of 300 h testing was co…
The effect of irradiation temperature on irradiation-induced dislocation loops in copper has been studied by x-ray diffuse scattering. Dislocation loop size distributions and total defect concentrations were obtained for irradiations in the temperature range 316–483 °K for neutron doses in the range (1–10) ×1018 n/cm2…
Oxidation of plutonium‐3.3 atomic percent (a/o) gallium in air was studied over the temperature range 250°–400°C. A paralinear oxidation process was observed at all temperatures although not clearly defined at 400°C. The temperature dependence of the oxidation rates indicated a change in the oxidation mechanism betwee…
Abstract A survey is given on lattice data, structures and certain properties of quaternary compounds of the type Cu 2 Me II Me IV Me 4 VI with Me II = Mn, Fe, Co, Zn, Cd, Hg; Me IV = Si, Ge, Sn; Me VI = S, Sc. Except for the selenides containing cobalt all compounds could be synthesized. They crystallize in acentric…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantitative x-ray diffractometry on milligram samples prepared on silver filtersS. Altree-WilliamsCite this: Anal. Chem. 1977, 49, 3, 429–432Publication Date (Print):March 1, 1977Publication History Published online1 May 2002Published inissue 1 March 1977https://pubs.acs.or…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyelectrolyte Builders as Detergent Phosphate ReplacementsJ. F. Schaffer and R. T. WoodhamsCite this: Ind. Eng. Chem. Prod. Res. Dev. 1977, 16, 1, 3–11Publication Date (Print):March 1, 1977Publication History Published online1 May 2002Published inissue 1 March 1977https://…
Two antarctic diatoms were studied in light and electron microscopes, and emended descriptions are given. Thalassiosira australis Peragallo is found to have strutted processes in clusters on the face of the valve as well as in a marginal ring, one labiate process and usually many occluded processes in a ring inside th…
ABSTRACT The migration of plasticizers used in polyvinylchloride films was investigated. Meat and meat/fat mixtures were covered with film placed between glass plates and stored at 4 ± 0.5°C. At predetermined storage times, samples were extracted, extracts saponified, and alcoholic constituent of plasticizer determine…
Equilibrium hydrogen pressures (PH2) were measured for the two-phase system, Li-LiH, for the liquid lithium of dilute solutions of 2.0 × 10−3 to 1.3 × 10−2 atomic ratio (H/Li), and for the liquid lithium controlled by a cold trap at temperatures between 200 and 450°C. From the variation of PH2 with temperature, the ap…
A study was undertaken to improve upon a previous rigid boundary atomistic calculation of the core properties of a/2〈110〉{110} edge dislocations in MgO. A flexible boundary method (Flex-II) based on linear elasticity theory and recently developed by Hoagland, Hirth and Gehlen (1976) was used to provide a more accurate…
A qua ntita tive d esc riptio n is g ive n for the dens ifi cati on process of glasses resulting from g lass [orma ti o n at ele vat ed pressures . Phe nome n olog ica l re lati ons a re de rived, or j us tifie d , whic h al low es tim ati on of th e de ns ifi calion rate K ' (with respect 10 formation pressure ) fro…
Summary The mineralogy of 14 chloritic soils of various drainage classes developed on different parent materials from the Loch Awe area of Argyllshire, Caithness, and the Southern Uplands reveals only minor variations'in clay mineralogy with profile depth, the frequent presence of primary minerals indicating that all…