Measurement and calculation of specific heat for a liquid Ni-Cu-Fe ternary alloy

Le Chen; Hai Peng Wang; Bing Bo Wei

Measurement and calculation of specific heat for a liquid Ni-Cu-Fe ternary alloy

Le Chen, Hai Peng Wang, Bing Bo Wei

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

The specific heat of liquid Ni₆₀Cu₂₀Fe₂₀ ternary alloy was measured by electromagnetic levitation drop calorimetry in the temperature range from 1436 to 2008 K. The maximum undercooling achieved in experiment is 232 K (0.14 T_L). The specific heat was determined as 33.27 J · mol^-1 · K^-1 which varied slightly with temperature. Furthermore,the temperature dependence of the specific heat of normal and undercooled liquid Ni₆₀Cu₂₀Fe₂₀ alloy was calculated by molecular dynamics method with embedded-atom potential (EAM) and quantum Sutton-Chen many-body potential (QSC). The calculated results indicate that the specific heat increases slowly with the decrease of temperature. By comparing these theoretical calculations with experiments, we found that the QSC model is more reasonable for predicting the specific heat of liquid Ni₆₀Cu₂₀Fe₂₀ alloy than the EAM model.

Original language	English
Pages (from-to)	384-389
Number of pages	6
Journal	Wuli Xuebao/Acta Physica Sinica
Volume	58
Issue number	1
State	Published - Jan 2009

Keywords

Electromagnetic levitation
Molecular dynamics
Specific heat
Undercooled liquid

Cite this

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abstract = "The specific heat of liquid Ni60Cu20Fe20 ternary alloy was measured by electromagnetic levitation drop calorimetry in the temperature range from 1436 to 2008 K. The maximum undercooling achieved in experiment is 232 K (0.14 TL). The specific heat was determined as 33.27 J · mol-1 · K-1 which varied slightly with temperature. Furthermore,the temperature dependence of the specific heat of normal and undercooled liquid Ni60Cu20Fe20 alloy was calculated by molecular dynamics method with embedded-atom potential (EAM) and quantum Sutton-Chen many-body potential (QSC). The calculated results indicate that the specific heat increases slowly with the decrease of temperature. By comparing these theoretical calculations with experiments, we found that the QSC model is more reasonable for predicting the specific heat of liquid Ni60Cu20Fe20 alloy than the EAM model.",

keywords = "Electromagnetic levitation, Molecular dynamics, Specific heat, Undercooled liquid",

author = "Le Chen and Wang, {Hai Peng} and Wei, {Bing Bo}",

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T1 - Measurement and calculation of specific heat for a liquid Ni-Cu-Fe ternary alloy

AU - Chen, Le

AU - Wang, Hai Peng

AU - Wei, Bing Bo

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N2 - The specific heat of liquid Ni60Cu20Fe20 ternary alloy was measured by electromagnetic levitation drop calorimetry in the temperature range from 1436 to 2008 K. The maximum undercooling achieved in experiment is 232 K (0.14 TL). The specific heat was determined as 33.27 J · mol-1 · K-1 which varied slightly with temperature. Furthermore,the temperature dependence of the specific heat of normal and undercooled liquid Ni60Cu20Fe20 alloy was calculated by molecular dynamics method with embedded-atom potential (EAM) and quantum Sutton-Chen many-body potential (QSC). The calculated results indicate that the specific heat increases slowly with the decrease of temperature. By comparing these theoretical calculations with experiments, we found that the QSC model is more reasonable for predicting the specific heat of liquid Ni60Cu20Fe20 alloy than the EAM model.

AB - The specific heat of liquid Ni60Cu20Fe20 ternary alloy was measured by electromagnetic levitation drop calorimetry in the temperature range from 1436 to 2008 K. The maximum undercooling achieved in experiment is 232 K (0.14 TL). The specific heat was determined as 33.27 J · mol-1 · K-1 which varied slightly with temperature. Furthermore,the temperature dependence of the specific heat of normal and undercooled liquid Ni60Cu20Fe20 alloy was calculated by molecular dynamics method with embedded-atom potential (EAM) and quantum Sutton-Chen many-body potential (QSC). The calculated results indicate that the specific heat increases slowly with the decrease of temperature. By comparing these theoretical calculations with experiments, we found that the QSC model is more reasonable for predicting the specific heat of liquid Ni60Cu20Fe20 alloy than the EAM model.

KW - Electromagnetic levitation

KW - Molecular dynamics

KW - Specific heat

KW - Undercooled liquid

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Measurement and calculation of specific heat for a liquid Ni-Cu-Fe ternary alloy

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