Experimental Study On Vacuum Sintering Performance Of Simulated Alien Soil And Laser Additive Manufacturing

Exploring the vast universe is a space dream relentlessly pursued by mankind.The moon is the only natural satellite on Earth,and Mars has great potential for space immigration.Alien bases can provide a key support platform for human space exploration,but relying on earth resources to build large-scale alien bases is costly.Therefore,it is of great significance to explore the use of in-situ resources of alien planets as base construction materials.This article is based on the concept of “source materials in-situ and manufacture in-situ”.Aiming at the widely available lunar soil and martian soil resources,the theoretical analysis and experimental verification are used to carry out the vacuum sintering performance research of alien soils and laser 3-D printing experimental research of alien soils,with a view to exploring new ideas for the production of materials for the construction of alien bases.First,the characterization analysis of simulated alien soils was performed.The chemical composition,mineral composition,particle size gradation and other initial characteristics of simulated lunar soil and simulated martian soil were studied,and their performance differences were compared and analyzed with real lunar soil and martian soil.The chemical composition of simulated lunar soil and real lunar soil was found to be SiO₂?TiO₂?Al₂O₃?Cr₂O₃?Fe O?Mn O?Mg O?Ca O?Na₂O?K2O?P2O5?S;the chemical composition of simulated and real martian soil is SiO₂?TiO₂?Al₂O₃?Fe₂O₃?Mg O?Ca O?Na₂O?K2O.Secondly,the experimental research on vacuum sintering performance of simulated lunar soil and martian soil was carried out.The vacuum tube furnace sintering was used to study the sintering performance of lunar and fire soils under different sintering processes at different temperatures and holding times.The micromorphology,phase composition,thermophysical properties,and mechanical properties of the sintered products were tested and analyzed.It was found that the simulated lunar soil and martian soil were black blocks after sinterinig,showing different morphologies.The test results show that the raw materials have good internal crystallization after sintering at high temperature and no new crystal phase is generated.The thermal conductivity of the sintered material is at least 0.317W/m·K,which is much lower than that of conventional concrete.The Vickers hardness of the material has an increasing trend with the sintering time increasing,and the maximum is 1.052 GPa.Finally,a laser 3-D printing experiment was performed to simulate lunar soil and martian soil.An alien soil laser 3-D printing platform was set up to study the microstructure and morphology of printed materials at different laser powers and layer thicknesses.Four sets of ideal printing process parameters were obtained,and a series of scale members were printed.The feasibility of laser 3-D printing of alien soil was verified.