高压物理学报2011，Vol.25Issue(3)：213-220,8.
3GPa熔融盐固体介质高温高压三轴压力容器的围压标定
Confined Pressure Calibration for 3 GPa Molten Salt Medium Triaxial Pressure Vessel under High Pressure and Temperature
摘要
Abstract
A triaxial deformation apparatus with 3 GPa molten salt medium pressure vessel was developed. It is based on the conventional Griggs design and the molten salt cell concept modified. There is a huge difference between apparent confined pressure and true confined pressure due to the friction in the assembly and the strength of the confined medium under high temperature and pressure. In this study, we used the partially molten method of LiCl-KCl to make the confined pressure calibration on the basis of the temperature calibration. We successfully observed the simultaneous variation of confined pressure displacement, axial stress and temperature disturbance when the specimen molten initially, then we calculated the true confined pressure by the given equation. Finally, we obtained a series of true confined pressure under different apparent confined pressure of 300~1 400 MPa. Additionally, we gave a interpretation about the friction in the pressure vessel. When the pressure is at 300~500 MPa, the friction percentage changed from 52% to 31.2% gradually. When the pressure is 700~1 200 MPa, the friction percentage dropped about 11.4%. When the pressure is 1 400 MPa, the friction percentage showed a slightly rise from 11.4% to 15.5%. The true confined pressure of the new pressure vessel is not only more accurate than the old one, it has reached the same level with the similar apparatus in other laboratories of the world.关键词
围压标定/视载围压/真实围压/混合氯化盐/部分熔融法/摩擦百分比Key words
confined pressure calibration apparent confined pressure true confined pressure mixed chlorate partially molten method friction percent分类
数理科学引用本文复制引用
韩亮,周永胜,何昌荣,姚文明,刘贵,刘照星,党嘉祥..3GPa熔融盐固体介质高温高压三轴压力容器的围压标定[J].高压物理学报,2011,25(3):213-220,8.基金项目
中国地震局地质研究所基本科研业务费 （）
中国地震局“十五”实验室建设项目“固体介质高温高压（3GPa）实验设备的研制”共同资助 （）
