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Teplofizika vysokikh temperatur, 2005, Volume 43, Issue 5, Pages 702–707
(Mi tvt1418)
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This article is cited in 5 scientific papers (total in 5 papers)
Thermophysical Properties of Materials
The Structure-Thermodynamic State and the Mechanism of Crystallization of Gallium-Based Melts
S. V. Prokhorenko L'vov Polytechnical Institute
Abstract:
Quantitative analysis of the structure factors and curves of radial distribution of atoms obtained as a result of X-ray study in a wide temperature range reveals a fundamental difference in the structure of melts of normal close-packed metals and semimetals $(\text{Ga}$, $\text{Bi})$. The results of calculation of the temperature dependence of the configurational component of entropy of semimetals confirm the presence of a covalent component of cluster type in the microheterogeneous structure of melts. The melting-crystallization processes, studied using the method of acoustic emission, exhibit a stepwise pattern for semimetals which is due to the incoherence of the metal and covalent components of the structure. The process of crystallization of gallium- and bismuth-based eutectic alloys is complicated by the presence of quasi-eutectic microsegregation, which affects both the structure parameters and configurational component of entropy.
Received: 02.10.2004
Citation:
S. V. Prokhorenko, “The Structure-Thermodynamic State and the Mechanism of Crystallization of Gallium-Based Melts”, TVT, 43:5 (2005), 702–707; High Temperature, 43:5 (2005), 700–705
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https://www.mathnet.ru/eng/tvt1418 https://www.mathnet.ru/eng/tvt/v43/i5/p702
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Abstract page: | 124 | Full-text PDF : | 62 |
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