Thermoelasticity of e-FeSi to 8 GPa and 1273 K

Journal Article · Thu Jan 01 04:00:00 EST 2009 · American Mineralogist

DOI:https://doi.org/10.2138/am.2009.3166· OSTI ID:980655

Whitaker, M; Liu, W; Liu, Q; Wang, L; Li, B

The elastic properties of {Sigma}-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{sub S0} = 168.9(7) GPa, G{sub 0} = 116.5(3) GPa, K{sub S0}{prime} = 6.6(2), G{sub 0}{prime} = 2.9(1), ({delta}K{sub S0}/{delta}T){sub P} = -0.023(1) GPa/K, ({delta}G{sub 0}/{delta}T){sub P} = -0.030(1) GPa/K. This study presents the first complete thermodynamically consistent set of elastic moduli and their temperature and pressure derivatives.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 980655
• Report Number(s): BNL--93573-2010-JA
• Journal Information: American Mineralogist, Journal Name: American Mineralogist Journal Issue: 7 Vol. 94; ISSN AMMIAY; ISSN 0003-004X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
DATA
ELASTICITY
EQUATIONS
INTERFEROMETRY
SHEAR
SOUND WAVES
SYNCHROTRON RADIATION
TEMPERATURE RANGE 0400-1000 K
THERMOELASTICITY
ULTRASONIC WAVES
VELOCITY
national synchrotron light source