Thermal Effects Due to Crystallization of Alloys with Unlimited and Limited Solubility of Components

High-resolution differential scanning calorimetry has been used to study the crystallization of binary alloys with unlimited and limited solubility of their constituents. A sharp and intense emission of crystallization heat has been invariably observed immediately below the liquidus curve. Standard...

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Bibliographic Details
Published inTechnical physics Vol. 64; no. 9; pp. 1319 - 1323
Main Authors Spivak, L. V., Shchepina, N. E.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.09.2019
Springer
Springer Nature B.V
Subjects
Alloys
Binary alloys
Calorimetry
Classical and Continuum Physics
Crystallites
Crystallization
Liquid phases
Liquidus
Physics
Physics and Astronomy
Solid State
Solubility
Specialty metals industry
Temperature effects
Variations
crystallization
calorimetry
melting
eutectic
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Summary:High-resolution differential scanning calorimetry has been used to study the crystallization of binary alloys with unlimited and limited solubility of their constituents. A sharp and intense emission of crystallization heat has been invariably observed immediately below the liquidus curve. Standard techniques to describe crystallization in the intercritical temperature range cannot explain the above phenomena. It is assumed that they may be associated with a large number of local microvolumes enriched with a crystallization-controlling component (concentration fluctuations) that appear in the liquid as approaching the liquidus curve. The appearance of such microvolumes precedes the spontaneous formation of many crystallites in a large volume of the liquid phase.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784219090184