Acoustic travel time gauges for in-situ determination of pressure and temperature in multi-anvil apparatus
- Stony Brook Univ., NY (United States). Department of Geosciences
- Stony Brook Univ., NY (United States). Mineral Physics Institute
- National Cheng Kung University, Tainan (Taiwan). Department of Earth Sciences
- Univ. of Chicago, IL (United States). GeoSoilEnviroCARS, Center for Advanced Radiation Sources
In this work, we developed a new method for in-situ pressure determination in multi-anvil, high pressure apparatus using an acoustic travel time approach within the framework of acoustoelasticity. The ultrasonic travel times of polycrystalline Al2O3 were calibrated against NaCl pressure scale up to 15 GPa and 900°C in a Kawai-type double-stage multi-anvil apparatus in conjunction with synchrotron X-radiation, thereby providing a convenient and reliable gauge for pressure determination at ambient and high temperatures. The pressures derived from this new travel time method are in excellent agreement with those from the fixed-point methods. Application of this new pressure gauge in an offline experiment revealed a remarkable agreement of the densities of coesite with those from the previous single crystal compression studies under hydrostatic conditions, thus providing strong validation for the current travel time pressure scale. Additionally, the travel time approach not only can be used for continuous in-situ pressure determination at room temperature, high temperatures, during compression and decompression, but also bears a unique capability that none of the previous scales can deliver, i.e., simultaneous pressure and temperature determination with a high accuracy (+-0.16 GPa in pressure and +-17°C in temperature). Therefore, the new in-situ Al2O3 pressure gauge is expected to enable new and expanded opportunities for offline laboratory studies of solid and liquid materials under high pressure and high temperature in multi-anvil apparatus.
- Research Organization:
- Stony Brook Univ., NY (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
- Grant/Contract Number:
- NA0001815; FG02-94ER14466; AC02-06CH11357
- OSTI ID:
- 1466799
- Alternate ID(s):
- OSTI ID: 1229604
- Journal Information:
- Journal of Applied Physics, Vol. 118, Issue 6; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
DIASCoPE: Directly integrated acoustic system combined with pressure experiments—A new method for fast acoustic velocity measurements at high pressure
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journal | March 2017 |
Elastic anomalies across phase transitions of praseodymium to 12 GPa
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journal | November 2018 |
Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure
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journal | April 2017 |
Experimental and theoretical studies on the elasticity of tungsten to 13 GPa
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journal | August 2018 |
My Career as a Mineral Physicist at Stony Brook: 1976–2019
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journal | December 2019 |
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