Abstract
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.
基金项目
National Natural Science Foundation of China(U2013603)
National Natural Science Foundation of China(52225403)
Program for Guangdong Introducing Innovative and Entrepreneurial Teams(2019ZT08G315)
Shenzhen National Science Fund for Distinguished Young Scholars(RCJC20210706091948015)
NETL
NSTL
维普
万方数据