Ultrasonic measurements in large volume press in conjunction with Xradiation techniques

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Ultrasonic measurements in large volume press in
conjunction with X-radiation techniques

• Jennifer Kung
• Contributors
• Baosheng Li
• Yanbin Wang
• Takeyuki Uchida

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Key Parameters of Elastic Properties
Travel time (t(PS)) Length (l) and Density
() --corresponding to P-T conditions
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Travel time measurement
40 MHz
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Ultrasonic measurements at high pressure and high
temperature Pre-Synchrotron era

• High pressure
• in piston cylinder (up to 3 GPa)
• in 6-8 type multi anvil press
• in diamond anvil cell

High temperature in gas high pressure
apparatus (0.3- 0.8 GPa) at atmospheric pressure

However it is difficult to measure - the
materials subjected plastic deformation across
the phase transition and without known EoS
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Ultrasonic measurements in conjunction with
X-radiation techniques in large volume press
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Ultrasonic assembly in T25
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14/8 cell assembly in T25
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Ultrasonic assembly in DIA
6 mm
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Sample Length observed from X-radiographic
image case of (MgFe)O
ll0(V/V0)1/3
Kung et al. (2002)
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X-ray diffraction patterns passing though
different sleeves
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Elasticity of HP-CEN MgSiO3 -unquenchable phase
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P-Volume-T data for HP-CEN ( to obtain the
density thermal expansion)
Cell volume (Å3)
Pressure (GPa)
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Elastic velocities and elastic moduli of HP-CEN
at high P-T
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Difference between the absolute pressure and
Deckers NaCl pressure scale as a function of
pressure
Li et al. (2004)
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• Elasticity and elastic behavior of the materials
  interested at high pressure and temperature
• - unquenchable phases
• - across phase transition
• - effect of partial melting on elasticity
• - order-disorder of cation
• - melts

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Ultrasonic measurement in Deformation-DIA
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Conical Slit device with multi-element
detector (white x-ray mode)
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• In deformation-DIA press
• -P-T-Volume-V(PS)-Stress
• - anisotropy
• - third-order elastic constants
  (acoustoelasticity)

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