Vacancy Formation Energy and Kinetic Properties of Liquid Metals

Abstract:

We investigated the relationship of the vacancy formation energy with kinematic viscosity and self-diffusion coefficient in liquid metals at the melting temperature. Formulas are obtained that relate experimental values of the vacancy formation energy, kinematic viscosity, and self-diffusion coefficient to the atomic size and mass, the melting and Debye temperatures. The viscosity and self-diffusion parameters are introduced. The ratio of these parameters to vacancy formation energy is equal to dimensionless constants. It is shown that the formulas for viscosity and self-diffusion differ only in dimensionless constants; the values of these constants are calculated. Linear regression analysis was carried out and formulas with the highest adjusted coefficient of determination were identified. The calculated values of the self-diffusion coefficient for a large number of liquid metals are presented.

• Periodical: Key Engineering Materials (Volume 880)
• Pages: 43-48
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.880.43
• Online since: March 2021
• Authors: Yuri N. Starodubtsev, Vladimir S. Tsepelev*
• Keywords: Kinematic Viscosity, Liquid Metals, Melting Temperature, Self-Diffusion Coefficient, Vacancy Formation Energy

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