scholarly journals Thermal extraction of volatiles from the lunar regolith simulant NU-LHT-2M: Preparations for in-situ analyses on the Moon

2019 ◽  
Vol 175 ◽  
pp. 41-51 ◽  
Author(s):  
P. Reiss ◽  
L. Grill ◽  
S.J. Barber
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.


2019 ◽  
Vol 19 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Daniela Billi ◽  
Claudia Mosca ◽  
Claudia Fagliarone ◽  
Alessandro Napoli ◽  
Cyprien Verseux ◽  
...  

AbstractBy investigating the survival and the biomarker detectability of a rock-inhabiting cyanobacterium, Chroococcidiopsis sp. CCMEE 029, the BIOMEX space experiment might contribute to a future exploitation of the Moon as a test-bed for key astrobiology tasks such as the testing of life-detection technologies and the study of life in space. Post-flight analyses demonstrated that the mixing of dried cells with sandstone and a lunar regolith simulant provided protection against space UV radiation. During the space exposure, dried cells not mixed with minerals were killed by 2.05 × 102 kJ m−2 of UV radiation, while cells mixed with sandstone or lunar regolith survived 1.59 × 102 and 1.79 × 102 kJ m−2, respectively. No differences in survival occurred among cells mixed and not mixed with minerals and exposed to space conditions in the dark; this finding suggests that space vacuum and 0.5 Gy of ionizing radiation did not impair the cells’ presence in space. The genomic DNA of dead cells was severely damaged but still detectable with PCR amplification of a short target, thus suggesting that short sequences should be targeted in a PCR-based approach when searching for traces of life. The enhanced stability of genomic DNA of dried cells mixed with minerals and exposed to space indicates that DNA might still be detectable after prolonged periods, possibly up to millions of years in microbes shielded by minerals. Overall, the BIOMEX results contribute to future experiments regarding the exposure of cells and their biomarkers to deep space conditions in order to further test the lithopanspermia hypothesis, the biomarker stability and the microbial endurance, with implications for planetary protection and to determine if the Moon has been contaminated during past human missions.


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>


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

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 11 (15) ◽  
pp. 6961
Author(s):  
Joanna J. Sokołowska ◽  
Piotr Woyciechowski ◽  
Maciej Kalinowski

NASA has revealed that they plan to resume manned missions and ensure the permanent presence of people in the so-called habitats on the Moon by 2024. Moon habitats are expected to be built using local resources—it is planned to use lunar regolith as aggregate in lunar concrete. Lunar concrete design requires a new approach in terms of both the production technology and the operating conditions significantly different from the Earth. Considering that more and more often it is assumed that the water present on the Moon in the form of ice might be used to maintain the base, but also to construct the base structure, the authors decided to investigate slightly more traditional composites than the recently promoted sulfur and polymer composites thermally hardened and cured. Numerous compositions of cement “lunar micro-mortars” and “lunar mortars” were made and tested to study rheological properties, namely, the consistency, which largely depend on the morphology of the fine-grained filler, i.e., regolith. For obvious reasons, the lunar regolith simulant (LRS) was used in place of the original Moon regolith. The used LRS mapped the grain size distribution and morphology of the real lunar regolith. It was created for the purpose of studying the erosive effect of dusty regolith fractions on the moving parts of lunar landers and other mechanical equipment; therefore, it simulated well the behavior of regolith particles in relation to cement paste. The obtained results made it possible to develop preliminary compositions for “lunar mortars” (possible to apply in, e.g., 3D concrete printing) and to prepare, test, and evaluate mortar properties in comparison to traditional quartz mortars (under the conditions of the Earth laboratory).


Author(s):  
Jahinder Momi ◽  
Taylor Lewis ◽  
Federico Alberini ◽  
Marit E. Meyer ◽  
Alessio Alexiadis

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