A test device and test method for high temperature and high pressure fluid-solid interaction

Abstract

The invention discloses a high-temperature high-pressure fluid-solid interaction test device and a test method. The test device comprises a pressure container, wherein two axial compression bars are arranged in the pressure container, a sample is placed between the two compression bars, the outer end of one compression bar is connected with a loading device, a displacement detector is arranged at the outer end of the compressor bar, the outer end of the other compression bar is connected with a pressure sensor, the loading device, the displacement detector and the pressure sensor are fixedly connected to a base, a heating device sheathes the pressure container, a liquid pressing hole and an optical window are formed in the surface of the pressure container, the heating device is arranged in a groove of the base, a temperature sensor is arranged on the contact surface of the heating device and the pressure container, the liquid pressing hole is communicated with a sample placing position, the optical window is rightly aligned withthe center of a sample, and an optical measuring system used for observing spectrum of the sample is mounted at the optical window. The test device disclosed by the invention has the advantages that measured data is closer to practice, comprehensiveness is better, the measured data is more accurate and reliable, and guidance on correct practice and usage analysis of the sample can be more facilitated.

Description

technical field [0001] The invention relates to a test device and a test method for high-temperature and high-pressure fluid-solid interaction, and belongs to the technical field of high-temperature and high-pressure experiments. Background technique [0002] High-temperature and high-pressure experiments are important research methods in many scientific fields, such as planetary and earth sciences, condensed matter physics, chemistry, and materials science, and have achieved many important research results. In earth science, high-temperature and high-pressure experiments provide a large amount of experimental data for people to understand the material composition and state of the earth's interior, as well as rock and mineralization. For example, through high-temperature and high-pressure experimental studies on mantle rocks, it is recognized that the seismic wave discontinuity at about 650 km in the mantle is caused by the phase transition of the olivine / pyroxene-perovskite...

AI Technical Summary

Problems solved by technology

It is impossible to separately load the axial load on the solid sample and measure the stress and strain of the solid sample in situ; (2) the existing autoclave system has a large volume, it is difficult to connect with a microscope and various spectrometers, and it is impossible to observe the surface of the solid sample in situ Morphological characteristics and the in-situ measurement of reaction products by means of spectroscopy; (3) Most of the existing methods for measuring strain use strain gauges, but the price of strain gauges that can be used under high temperature conditions is relatively high, and strain gauges under high temperature conditions The temperature compensation of the gauge is difficult to deal with. Under the condition of water fluid with high temperature and high confining pressure, the insulation problem of the strain gauge is also difficult to deal with, and the strain gauge is directly attached to the surface of the solid sample, which is useful for the study of the solid-fluid interface reaction. influences

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