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Erschienen in: Physics of Metals and Metallography 10/2023

01.10.2023 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

A Model for the Melting of Pure Metals

verfasst von: V. N. Chuvil’deev, A. V. Semenycheva

Erschienen in: Physics of Metals and Metallography | Ausgabe 10/2023

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Abstract

A model for calculating the latent melting heat of pure metals in the process of their fusion with consideration for the phonon “Casimir force” analogue is presented. The model makes it possible to explain the difference between the experimental and theoretically calculated specific melting heats by the sum of jumps in the configurational and vibrational entropies during the solid–liquid phase transition. The described approach also provides the possibility of estimating the volume jump under melting from the crystal geometry and thermodynamic parameters of a material.

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Fußnoten
1
It should be clarified why the Casimir force can not be immediately used to estimate the “pressing” force. Let us note that the classic Casimir force is related to the specific features inherent in the behavior of electromagnetic waves. To estimate this force, it is necessary to consider the fact that electromagnetic waves penetrate into solids to the skin-layer depth. This depth depends on the frequency of electromagnetic waves and, in any case, is many orders of magnitude higher than the scale of processes considered here that attains several fractions of interatomic distance.
 
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Metadaten
Titel
A Model for the Melting of Pure Metals
verfasst von
V. N. Chuvil’deev
A. V. Semenycheva
Publikationsdatum
01.10.2023
Verlag
Pleiades Publishing
Erschienen in
Physics of Metals and Metallography / Ausgabe 10/2023
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X23601774

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