Metallurgical Equilibrium Diagrams
About: This article is published in Physics Today.The article was published on 1953-10-01. It has received 43 citations till now.
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TL;DR: In this article, a set of thermodynamic parameters more consistent with most of the selected experimental data than previous assess-ments has been obtained by a computerized least-squares method using phenomenological models for the Gibbs energy of various phases.
Abstract: Thermochemical and phase diagram data in the Fe-Cu system have been critically evaluated by using phenomenological models for the Gibbs energy of various phases A set of thermodynamic parameters more consistent with most of the selected experimental data than previous assess-ments has been obtained by a computerized least-squares method Stable and metastable phase equilibria,T
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curves, and thermodynamic properties are calculated with the optimized param-eters The calculated liquid/face-centered cubic (fcc)T
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curve and metastable liquid spinodal seem to permit an accurate prediction of maximum solid solubility obtained upon melt quenching in this system
136 citations
TL;DR: Titanium dioxide films were prepared by ultrasonic spray pyrolysis on (0001) α-quartz substrates at 400°C and/or annealed in air at 600°, 800°, or 1000°C.
98 citations
TL;DR: The equilibrium diagram of the system gold-gallium has been determined by a combination of thermal analysis, and microscopical and X-ray metallography as discussed by the authors, which has led to the discovery of a close-packed α-phase, with ABAC stacking sequence, lying outside the Au-rich α-solid solution.
Abstract: The equilibrium diagram of the system gold-gallium has been determined by a combination of thermal analysis, and microscopical and X-ray metallography. The work has led to the discovery of a close-packed α-phase, with ABAC… stacking sequence, lying outside the Au-rich α-solid solution. The small β-phase region claimed by Weibke and Hesse has been shown not to exist, whilst three new phases have been discovered in the intermediate region.
97 citations
TL;DR: In this paper, a method for calculating activities, activity coefficients, and other partial molal properties for two components of a ternary system from experimental measurements of this property for the third component is presented.
85 citations
TL;DR: The equilibrium diagram of the Niobium-Nickel system has been determined by a combination of thermal analysis, microscopical metallography, and X-ray techniques as mentioned in this paper.
Abstract: The equilibrium diagram of the system niobium-nickel has been determined by a combination of thermal analysis, microscopical metallography, and X-ray techniques. Nickel is able to dissolve up to 12.5 at. % Nb at high temperatures, whilst niobium dissolves only 4.5 at. % of Ni. The system contains an intermediate phase (β) Ni3Nb with the Cu3Ti type of structure, which gives rise to a maximum on the liquidus curve at 1402°C. There is also a γ-phase of composition limits 50–54 atomic % Nb, formed by a peritectic reaction at 1295°C.
53 citations