首页|Selection and thermal physical characteristics analysis of in-situ condition preserved coring lunar rock simulant in extreme environment
Selection and thermal physical characteristics analysis of in-situ condition preserved coring lunar rock simulant in extreme environment
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NETL
NSTL
万方数据
维普
With the increasing scarcity of Earth's resources and the development of space science and technology,the exploration,development,and utilization of deep space-specific material resources(minerals,water ice,volatile compounds,etc.)are not only important to supplement the resources and reserves on Earth but also provide a material foundation for establishing extraterrestrial research bases.To achieve large depth in-situ condition-preserved coring(ICP-Coring)in the extreme lunar environment,first,lunar rock simulant was selected(SZU-1),which has a material composition,element distribution,and physical and mechanical properties that are approximately equivalent to those of lunar mare basalt.Second,the influ-ence of the lunar-based in-situ environment on the phase,microstructure,and thermal physical proper-ties(specific heat capacity,thermal conductivity,thermal diffusivity,and thermal expansion coefficient)of SZU-1 was explored and compared with the measured lunar rock data.It was found that in an air atmo-sphere,low temperature has a more pronounced effect on the relative content of olivine than other tem-peratures,while in a vacuum atmosphere,the relative contents of olivine and anorthite are significantly affected only at temperatures of approximately-20 and 200 °C.When the vacuum level is less than 100 Pa,the contribution of air conduction can be almost neglected,whereas it becomes dominant above this threshold.Additionally,as the testing temperature increases,the surface of SZU-1 exhibits increased microcracking,fracture opening,and unevenness,while the specific heat capacity,thermal conductivity,and thermal expansion coefficient show nonlinear increases.Conversely,the thermal diffusivity exhibits a nonlinear decreasing trend.The relationship between thermal conductivity,thermal diffusivity,and temperature can be effectively described by an exponential function(R2>0.98).The research results are consistent with previous studies on real lunar rocks.These research findings are expected to be applied in the development of the test and analysis systems of ICP-Coring in a lunar environment and the explo-ration of the mechanism of machine-rock interaction in the in-situ drilling and coring process.
Lunar-basedLunar rock simulantExtreme environmentThermal physical properties
Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Institute of Deep Earth Sciences and Green Energy,College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China
Shenzhen Key Laboratory of Deep Underground Engineering Sciences and Green Energy,Shenzhen University,Shenzhen 518060,China
Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaProgram for Guangdong Introducing Innovative and Entrepreneurial TeamsShenzhen National Science Fund for Distinguished Young Scholars
NETL
NSTL
万方数据
维普
