1 / 19

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

Ultrasonic measurements in large volume press in conjunction with X-radiation techniques. Jennifer Kung Contributors Baosheng Li Yanbin Wang Takeyuki Uchida. Key Parameters of Elastic Properties. Travel time ( t (P,S) ), Length (l) and Density ( ) -- corresponding to P-T conditions.

arlene
Télécharger la présentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ultrasonic measurements in large volume press in conjunction with X-radiation techniques Jennifer Kung Contributors Baosheng Li Yanbin Wang Takeyuki Uchida

  2. Key Parameters of Elastic Properties Travel time (t(P,S)), Length (l) and Density () --corresponding to P-T conditions

  3. f = 30~70 MHz Piezoelectric Transducer Sample Buffer rod Buffer rod Sample 1~3 mm Travel time 0.2~0.7 s 2~3 mm Travel time measurement 40 MHz

  4. S: linear compression Thermal expansion (α) Known EOS Ultrasonic measurements at high pressure and high temperature: Pre-Synchrotron era High temperature – in gas high pressure apparatus (0.3- 0.8 GPa) at atmospheric pressure High pressure – in piston cylinder (up to 3 GPa) in 6-8 type multi anvil press in diamond anvil cell However, it is difficult to measure - the materials subjected plastic deformation, across the phase transition and without known EoS

  5. Au foil C C D C a m e r a sample ~1030mm Au foil T - 2 5 p r e s s Length measurement using X-radiographic image M i c r o s c o p e o b j e c t i v e 2 5 m m W C c u b e S l i t s y s t e m Ultrasonic cell assembly Y A G C r y s t a l M i r r o r q 2 X - r a y D i f f r a c t e d X - r a y s S S D Cell volumes of sample and NaCl S P Ultrasonic system and dual mode transducer Ultrasonic measurements in conjunction with X-radiation techniques in large volume press

  6. transducer Ultrasonic assembly in T25

  7. transducer 14/8 cell assembly in T25

  8. Ultrasonic assembly in DIA 6 mm

  9. 0 1.5 2.1 4.2 4.8 6.2 7.0 8.2 9.0 GPa *(NaCl pressure scale) Sample Length observed from X-radiographic image: case of (Mg,Fe)O l=l0(V/V0)1/3 Kung et al. (2002)

  10. X-ray diffraction patterns passing though different sleeves

  11. 1 5 0 0 P r o t o E n B t H i g h - P C l i n o E n + ) S t C 1 0 0 0 O r t h o E n o ( e r synthesis u t a r e p m e 5 0 0 T S p i n e l + L o w C E n S t i s h o v i t e 0 5 1 5 1 0 P r e s s u r e ( G P a ) Elasticity of HP-CEN MgSiO3-unquenchable phase

  12. 393 1000C 900C 390 800C 600C 387 400C 200C RT 384 381 378 375 372 6 8 10 12 14 P-Volume-T data for HP-CEN ( to obtain the density, thermal expansion) Cell volume (Å3) Pressure (GPa)

  13. KS=(Vp2-4/3Vs2) P wave 9.6 (b) 190 ~0.7% ° 27 C (b) 185 ° 200 C ° 27 C 9.4 ° 400 C ° 200 C 180 ° ° 400 C 600 C ° 600 C ° 800 C ° 800 C 175 0.5% 9.2 170 165 9.0 Solid - T409 160 Solid - T409 Open - T354 Modulus (GPa) Open - T354 Velocity (km/s) 155 8.8 S wave G=Vs2 (a) 105 (a) ° 27 C ° 27 C 5.4 ° 200 C 102 ° 200 C ° 400 C ° 99 400 C 5.3 ° 600 C ° 600 C 96 ° 800 C ° 800 C ~1.0% 5.2 93 0.5% 90 5.1 87 6 7 8 9 10 11 12 13 Pressure (GPa) 5.0 6 7 8 9 10 11 12 13 Pressure (GPa) Pressure (GPa) Elastic velocities and elastic moduli of HP-CEN at high P-T

  14. Difference between the absolute pressure and Decker’s NaCl pressure scale as a function of pressure Li et al. (2004)

  15. 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

  16. Ultrasonic measurement in Deformation-DIA

  17. d(hkl)1 d(hkl)3 13 element SS detector conical slit (outer cone shown in outline) X-ray sample Conical Slit device with multi-element detector (white x-ray mode)

  18. In deformation-DIA press -P-T-Volume-V(P,S)-Stress - anisotropy - third-order elastic constants (acoustoelasticity)

More Related