Thermoelasticity of ε-FeSi to 8 GPa and 1273 K

Matthew L. Whitaker; Wei Liu; Qiong Liu; Liping Wang; Baosheng Li

doi:10.2138/am.2009.3166

Thermoelasticity of ε-FeSi to 8 GPa and 1273 K

Matthew L. Whitaker
, Wei Liu
, Qiong Liu
, Liping Wang
, Baosheng Li

Stony Brook University

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

20 Scopus citations

Abstract

The elastic properties of ε-FeSi were investigated at high temperature and pressure using a combination of ultrasonic interferometry and synchrotron radiation up to 8 GPa and 1273 K. The unit-cell volumes and sound velocity data were fit to third-order finite-strain equations with adiabatic temperature conversions to maintain a thermodynamically internally consistent data set. The adiabatic zero-pressure bulk and shear moduli and their first pressure and temperature derivatives were obtained from this fitting: K_S0 = 168.9(7) GPa, G₀ = 116.5(3) GPa, K_S0′ = 6.6(2), G₀′ = 2.9(1), (∂K_S0/∂T)_P = -0.023(1) GPa/K, (∂G₀/∂T)_P = -0.030(1) GPa/K. This study presents the first complete thermodynamically consistent set of elastic moduli and their temperature and pressure derivatives.

Original language	English
Pages (from-to)	1039-1044
Number of pages	6
Journal	American Mineralogist
Volume	94
Issue number	7
DOIs	https://doi.org/10.2138/am.2009.3166
State	Published - Jul 2009

Keywords

Elastic properties
Equation of state
High pressure
High temperature
Iron silicide
Ultrasonic interferometry

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10.2138/am.2009.3166

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title = "Thermoelasticity of ε-FeSi to 8 GPa and 1273 K",

abstract = "The elastic properties of ε-FeSi were investigated at high temperature and pressure using a combination of ultrasonic interferometry and synchrotron radiation up to 8 GPa and 1273 K. The unit-cell volumes and sound velocity data were fit to third-order finite-strain equations with adiabatic temperature conversions to maintain a thermodynamically internally consistent data set. The adiabatic zero-pressure bulk and shear moduli and their first pressure and temperature derivatives were obtained from this fitting: KS0 = 168.9(7) GPa, G0 = 116.5(3) GPa, KS0′ = 6.6(2), G0′ = 2.9(1), (∂KS0/∂T)P = -0.023(1) GPa/K, (∂G0/∂T)P = -0.030(1) GPa/K. This study presents the first complete thermodynamically consistent set of elastic moduli and their temperature and pressure derivatives.",

keywords = "Elastic properties, Equation of state, High pressure, High temperature, Iron silicide, Ultrasonic interferometry",

author = "Whitaker, \{Matthew L.\} and Wei Liu and Qiong Liu and Liping Wang and Baosheng Li",

year = "2009",

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T1 - Thermoelasticity of ε-FeSi to 8 GPa and 1273 K

AU - Whitaker, Matthew L.

AU - Liu, Wei

AU - Liu, Qiong

AU - Wang, Liping

AU - Li, Baosheng

PY - 2009/7

Y1 - 2009/7

N2 - The elastic properties of ε-FeSi were investigated at high temperature and pressure using a combination of ultrasonic interferometry and synchrotron radiation up to 8 GPa and 1273 K. The unit-cell volumes and sound velocity data were fit to third-order finite-strain equations with adiabatic temperature conversions to maintain a thermodynamically internally consistent data set. The adiabatic zero-pressure bulk and shear moduli and their first pressure and temperature derivatives were obtained from this fitting: KS0 = 168.9(7) GPa, G0 = 116.5(3) GPa, KS0′ = 6.6(2), G0′ = 2.9(1), (∂KS0/∂T)P = -0.023(1) GPa/K, (∂G0/∂T)P = -0.030(1) GPa/K. This study presents the first complete thermodynamically consistent set of elastic moduli and their temperature and pressure derivatives.

AB - The elastic properties of ε-FeSi were investigated at high temperature and pressure using a combination of ultrasonic interferometry and synchrotron radiation up to 8 GPa and 1273 K. The unit-cell volumes and sound velocity data were fit to third-order finite-strain equations with adiabatic temperature conversions to maintain a thermodynamically internally consistent data set. The adiabatic zero-pressure bulk and shear moduli and their first pressure and temperature derivatives were obtained from this fitting: KS0 = 168.9(7) GPa, G0 = 116.5(3) GPa, KS0′ = 6.6(2), G0′ = 2.9(1), (∂KS0/∂T)P = -0.023(1) GPa/K, (∂G0/∂T)P = -0.030(1) GPa/K. This study presents the first complete thermodynamically consistent set of elastic moduli and their temperature and pressure derivatives.

KW - Elastic properties

KW - Equation of state

KW - High pressure

KW - High temperature

KW - Iron silicide

KW - Ultrasonic interferometry

UR - https://www.scopus.com/pages/publications/68949103948

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DO - 10.2138/am.2009.3166

M3 - Article

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SN - 0003-004X

VL - 94

SP - 1039

EP - 1044

JO - American Mineralogist

JF - American Mineralogist

IS - 7

ER -

Thermoelasticity of ε-FeSi to 8 GPa and 1273 K

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Keywords

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