Ab initio inspection of thermophysical experiments for zirconium near melting

We present quantum molecular dynamics calculations of thermophysical properties of solid and liquid zirconium in the vicinity of melting. An overview of available experimental data is also presented. We focus on the analysis of thermal expansion, molar enthalpy, resistivity and normal spectral emiss...

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Published in:arXiv.org 2021-04
Main Authors: Paramonov, M A, Minakov, D V, Fokin, V B, Knyazev, D V, Demyanov, G S, Levashov, P R
Format: Article
Language:English
Subjects:
Electrical resistivity
Enthalpy
Experiments
Inspection
Magnetic levitation
Mathematical analysis
Melting
Molecular dynamics
Spectral emissivity
Thermal expansion
Thermophysical properties
Zirconium
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Minakov, D V
Fokin, V B
Knyazev, D V
Demyanov, G S
Levashov, P R
description We present quantum molecular dynamics calculations of thermophysical properties of solid and liquid zirconium in the vicinity of melting. An overview of available experimental data is also presented. We focus on the analysis of thermal expansion, molar enthalpy, resistivity and normal spectral emissivity of solid and liquid Zr. Possible reasons of discrepancies between the first-principle simulations and experiments are discussed. Our calculations reveal a significant volume change on melting in agreement with electrostatic levitation experiments. Meanwhile, we confirm a low value of enthalpy of fusion obtained in some pulse-heating experiments. Electrical resistivity of solid and liquid Zr is systematically underestimated in our simulations, however the slope of resistivity temperature dependencies agrees with experiment. Our calculations predict almost constant normal spectral emissivity in liquid Zr.
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subjects Electrical resistivity
Enthalpy
Experiments
Inspection
Magnetic levitation
Mathematical analysis
Melting
Molecular dynamics
Spectral emissivity
Thermal expansion
Thermophysical properties
Zirconium
title Ab initio inspection of thermophysical experiments for zirconium near melting
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