Laser melting of extraplanetary rocks under lunar conditions

月球条件下行外岩石的激光熔化

• 批准号: 458595944
• 负责人: Professor Dr.-Ing. Ludger Overmeyer
• 金额: --
• 依托单位: Fachgebiet Raumfahrttechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/458595944?language=en
• 关键词: Laser; melting; extraplanetary; rocks; under

The overall objective of the proposed project is to determine the influence of reduced gravity and vacuum on laser melting of extraplanetary rock powder as a basis for building infrastructure by In-Space Resource Utilization (ISRU) on other celestial bodies. The focus is on the use of lunar regolith, since the moon is currently a major target of international spaceflight and there is currently no adequate scientific basis for laser melting under lunar conditions.Laser Powder Bed Fusion (LPBF) of regolith has the potential to drastically reduce the costs and transport requirements of future space missions. The research instrument of the Einstein Elevator provides the necessary infrastructure to study laser melting of regolith under lunar gravity. Up to 100 experiments can be performed at 4 seconds of weightlessness per day (8 hours), which makes this research device unique in the international arena. The atmospheric conditions on the moon's surface can be sufficiently approximated by a vacuum.For the project, regolith simulants will be produced and their chemical and mineralogical composition will be analyzed. The particle properties and their interaction with the process in terms of thermal input will be investigated experimentally and simulatively. Thus, it shall be determined how lunar conditions influence the melting behaviour of lunar rocks under consideration of the reduced heat dissipation and gravitation. In addition, the influence of natural variations in the composition of the regolith on the melting behaviour will be investigated. The project will thus use experimental methods and simulation to show which material properties can be produced under reduced gravity and vacuum compared to terrestrial conditions. A derived model will allow the prediction of the properties of the melt products.

拟议项目的总体目标是确定重力降低和真空对行星际岩石粉末激光熔化的影响，以此作为空间资源利用局在其他天体上建设基础设施的基础。重点是月壤的使用，因为月球目前是国际空间飞行的一个主要目标，目前在月球条件下激光熔化没有充分的科学依据，月壤的激光粉末床熔化有可能大大降低未来空间飞行任务的成本和运输要求。爱因斯坦电梯的研究仪器为研究月球重力下激光熔化风化层提供了必要的基础设施。每天4秒钟（8小时）的失重状态下最多可进行100项实验，这使得这一研究装置在国际竞技场上独一无二。月球表面的大气条件可以通过真空充分近似。该项目将生产风化层模拟物，并分析其化学和矿物成分。将通过实验和模拟研究颗粒特性及其与热输入过程的相互作用。因此，应确定月球条件如何影响月球岩石的熔化行为，同时考虑到减少的热耗散和引力。此外，还将研究风化层成分的自然变化对熔化行为的影响。因此，该项目将使用实验方法和模拟来显示与陆地条件相比，在重力和真空降低的情况下可以产生哪些材料特性。导出的模型将允许预测熔融产物的性质。