In-situ resource utilisation manufacturing of optically transparent glass from lunar regolith simulant

Author(s):  
Juergen Schleppi ◽  
Geoffrey Bromiley ◽  
Nic Odling ◽  
Nick S. Bennett
Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4128
Author(s):  
Xin Li Phuah ◽  
Han Wang ◽  
Bruce Zhang ◽  
Jaehun Cho ◽  
Xinghang Zhang ◽  
...  

In situ utilization of available resources in space is necessary for future space habitation. However, direct sintering of the lunar regolith on the Moon as structural and functional components is considered to be challenging due to the sintering conditions. To address this issue, we demonstrate the use of electric current-assisted sintering (ECAS) as a single-step method of compacting and densifying lunar regolith simulant JSC-1A. The sintering temperature and pressure required to achieve a relative density of 97% and microhardness of 6 GPa are 700 °C and 50 MPa, which are significantly lower than for the conventional sintering technique. The sintered samples also demonstrated ferroelectric and ferromagnetic behavior at room temperature. This study presents the feasibility of using ECAS to sinter lunar regolith for future space resource utilization and habitation.


2020 ◽  
Author(s):  
Luís Lopes ◽  
Shashank Govindaraj ◽  
Balazs Bodo ◽  
Kevin Picton ◽  
Joseph Purnell ◽  
...  

<p>PRO-ACT (Horizon 2020; https://www.h2020-pro-act.eu/) studies the establishment of a lunar base with the support of a mobile robotic platform formed by three distinct robots, with different features, based on their cooperation and manipulation capabilities. This vision will provide tools in preparation of the commercial exploitation of in-situ resources by assembling an ISRU (In-Situ Resource Utilisation) system, essential for a future human settlement at the Moon. PRO-ACT’s vision of ISRU focuses on the extraction of oxygen from lunar regolith to serve as the oxidizer for fuel and artificial atmosphere generation within habitats and 3D printing of relevant structures using regolith for construction purposes – including tiles for roads and elements for shelters. The mineral ilmenite, found in lunar rocks, is the perfect target for the ISRU platform as it contains oxygen, iron and titanium as construction materials.</p><p>The main goal of PRO-ACT is to implement and demonstrate the cooperative capabilities of the multi-robot system in a Moon alike environment that will be replicated at two sites, indoors and outdoors, in Europe. For this purpose, the PRO-ACT project (OG11) will also rely on the outcomes of previous space-related projects from the PERASPERA project and its Operational Grants. Therefore, PRO-ACT will: 1) Review, extend and integrate previous OGs outcomes as part of a comprehensive multi-robot system, in a Moon construction scenario, 2) Develop robust cooperation capabilities allowing joint interventions (navigation in close vicinity and joint manipulation actions) in mixed structured/unstructured environment, 3) Make the capabilities available within a CREW module, 4) Customize existing mobile robotic platforms and prepare facilities to perform tests and demonstrations in a selection of relevant scenarios of Moon construction activities (ISRU capabilities establishment; preparing dust mitigation surfaces; assembling and deploying a gantry/3D printer).</p><p>PRO-ACT will show what robotic cooperation can achieve and will demonstrate the effectiveness of collaborative mission planning, and manipulation and assembly of a supporting infrastructure. Cooperative scenarios will be based on: 1) fine scale surveying of areas prior to construction work, 2) site clearing by grading stones and debris, 3) unloading equipment/construction elements and transporting them to the assembly sites, 4) assembly of specific modular components of an ISRU plant, 5) assisting partial assembly and mobility of a gantry, 6) 3D printing of modular building elements from pseudo-regolith simulant, and 7) sample assembly of printed elements to construct sections of storage, habitation spaces or dust mitigation surfaces. Following this scenario, the key robotic elements, (the mobile rover IBIS, the six-legged walking robot Mantis and a gantry) are outlined according to the corresponding mission architecture. The ISRU plant size is representative of a future lunar mission, with grasping points to assist robotic manipulation capabilities and considering reduced lunar gravity.</p><p>The target of this work is to reach a Technology Readiness Level of TRL 4/5 (depending on scenarios subparts) with this approach, to enable exploration of the Moon environment in the next decade. This will be achieved and proven with the performance of the required tests and demonstrations in Lunar analogues, in order to validate the newly developed capabilities.</p>


2021 ◽  
Author(s):  
Luís Lopes ◽  
Shashank Govindaraj ◽  
Wiebke Brinkmann ◽  
Simon Lacroix ◽  
Jakub Stelmachowski ◽  
...  

<p>The PRO-ACT project studies, designs and develops the establishment of a lunar base with the support of a multi-robotic platform, entailing different features, tasks and capabilities. The activities are inline with the preparation of the commercial exploitation of in-situ resources and planetary exploration research by assembling an ISRU (In-Situ Resource Utilisation) system tested in a lunar analogue setting. The vision of PRO-ACT is based on the extraction of oxygen from lunar regolith which serves as oxidizer for fuel and artificial atmosphere generation for habitats and 3D printing of relevant structures using regolith for construction purposes.</p><p>The main goal of PRO-ACT is to implement and demonstrate the cooperative capabilities of the multi-robot system in a Moon-like environment. PRO-ACT uses three robots: Veles - a six-wheeled rover; Mantis - a six-legged walking system; and a mobile gantry. The final demonstration tests are set for early 2021.</p><p>Work implementation for the final deployment on the lunar analogue comprises: 1) during simulations, the planned mission scenarios and functional tests of the sub-components are carried out, to gain results of the real systems as well as to check the function of the developed software on the involved robotic systems; 2) remote testing of the robotic elements are implemented with the goal to integrate the software developed in the project and develop the first functional tests of the robot systems with the implemented software, 3) onsite demonstration of the project in Bremen, Germany, in a lunar analogue setting. For this indoor lunar analogue environment it was decided to create and set up a testbed with regolith simulant for testing purposes. It will be possible to replicate realistic simulation conditions (eg. navigation, mobility, autonomy) as found in the moon, which are adequate to certify the project’s goals.</p><p>The final demonstration will be conducted in the Space Exploration Hall at DFKI in Bremen. During the project, it was decided to build a large test field (with an area of 48m²) in front of the crater in the Hall, which will be filled with granulate/simulant (fill level 20-30 cm) in order to carry out moonlike mission scenarios with the involved robotic systems. The challenge was to find the appropriate granulate: the choice fell on using sand from the Baltic sea with grain size of 0.1-1.0mm, with the majority in the larger fraction. This simulant presents both relevant geomorphological and space exploration lunar conditions that are necessary for the certification of PRO-ACT’s activities, while complying with necessary health regulations. Other considered options included EAC-1A, the European Astronaut Centre lunar regolith simulant 1, which is a special mixture of 0.2-1.0mm (65% 0.2-0.5mm and 35% 0.5-1.0mm), but this is very dusty and hazardous to health in enclosed rooms, such as the Space Exploration Hall. It was, therefore, disregarded due to health and safety conditions.</p><p>To keep lunar fidelity up to a maximum, the final demonstration setup will include, besides the referred simulant, boulders (~2m), slopes of different angles, the Hall’s crater, light/darkness conditions controlled by a light system and environmental dryness. </p>


2022 ◽  
pp. 105414
Author(s):  
Michail Samouhos ◽  
Petros Tsakiridis ◽  
Magued Iskander ◽  
Maria Taxiarchou ◽  
Konstantinos Betsis

2020 ◽  
Vol 180 ◽  
pp. 104757
Author(s):  
L. Grill ◽  
P. Ostermeier ◽  
M. Würth ◽  
P. Reiss

Author(s):  
Athanasios Goulas ◽  
Jon GP Binner ◽  
Daniel S Engstrøm ◽  
Russell A Harris ◽  
Ross J Friel

Additive manufacturing and its related techniques have frequently been put forward as a promising candidate for planetary in-situ manufacturing, from building life-sustaining habitats on the Moon to fabricating various replacements parts, aiming to support future extra-terrestrial human activity. This paper investigates the mechanical behaviour of lunar regolith simulant material components, which is a potential future space engineering material, manufactured by a laser-based powder bed fusion additive manufacturing system. The influence of laser energy input during processing was associated with the evolution of component porosity, measured via optical and scanning electron microscopy in combination with gas expansion pycnometry. The compressive strength performance and Vickers micro-hardness of the components were analysed and related back to the processing history and resultant microstructure of the lunar regolith simulant build material. Fabricated structures exhibited a relative porosity of 44–49% and densities ranging from 1.76 to 2.3 g cm−3, with a maximum compressive strength of 4.2 ± 0.1 MPa and elastic modulus of 287.3 ± 6.6 MPa, the former is comparable to a typical masonry clay brick (3.5 MPa). The additive manufacturing parts also had an average hardness value of 657 ± 14 HV0.05/15, better than borosilicate glass (580 HV). This study has shed significant insight into realising the potential of a laser-based powder bed fusion additive manufacturing process to deliver functional engineering assets via in-situ and abundant material sources that can be potentially used for future engineering applications in aerospace and astronautics.


2021 ◽  
Vol 33 (3) ◽  
pp. 037117
Author(s):  
Garrett L. Schieber ◽  
Brant M. Jones ◽  
Thomas M. Orlando ◽  
Peter G. Loutzenhiser

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