Acoustic travel time gauges for in-situ determination of pressure and temperature in multi-anvil apparatus
Acoustic travel time gauges for in-situ determination of pressure and temperature in multi-anvil apparatus
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DOI：
10.1063/1.4928147
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发表时间：
2015-08
影响因子：
3.2
通讯作者：
Xuebing Wang;Ting Chen;X. Qi;Yongtao Zou;J. Kung;Tony Yu;Yanbin Wang;R. Liebermann;Baosheng Li
中科院分区：
文献类型：
--
作者：
Xuebing Wang;Ting Chen;X. Qi;Yongtao Zou;J. Kung;Tony Yu;Yanbin Wang;R. Liebermann;Baosheng Li
In this study, 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. The travel time approach not only can be used for continuous in-situ pressur...
