Experimental Characterization of Thermal Wadis in Support of Lunar Exploration

Matyáš, Josef; Wegeng, Robert S.; Robinson, M.

doi:10.2514/6.2011-7364

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…26 It is hypothesized that the higher porosities with various shapes and sizes originate from reducing the hematite phase, resulting in oxygen release, and creating bubble-like pores. 23,27 XRD analysis is presented in Figure 3. Anorthite and feldspar are the main phases of the as-received MMS-1 powders.…”

Section: Resultsmentioning

confidence: 99%

“…However, manufacturing a crack‐free composite at higher content of Martian regolith is difficult due to Martian powder's poor thermal shock resistance and mismatch between the constituent powders and the substrate 26 . It is hypothesized that the higher porosities with various shapes and sizes originate from reducing the hematite phase, resulting in oxygen release, and creating bubble‐like pores 23,27 …”

Section: Resultsmentioning

confidence: 99%

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Martian regolith—Ti6Al4V composites via additive manufacturing

Afrouzian

Traxel

Bandyopadhyay

2022

Int J Applied Ceramic Tech

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In order to investigate the in-space in situ resource utilization, directed energy deposition (DED)-based additive manufacturing (AM) has been utilized to process Martian regolith-Ti6Al4V (Ti64) composites. Here we investigated the processability of depositing 5, 10, and 100 wt% of Martian regolith premixed with Ti6Al4V using laser-based DED, analyzing the printed structure via X-ray diffraction, Vicker's microhardness, scanning electron microscopic imaging, and wear characteristics utilizing an abrasive water jet cutter to simulate abrasive environments on the Martian surface. The results indicate that the surface roughness and hardness of the composites increase with respect to the Martian regolith' weight percentage due to in situ ceramic reinforcement. For instance, i5-wt% addition of Martian regolith increased the Vicker's microhardness from 366 ± 6 HV 0.2 for as-printed Ti64 to 730 ± 27 HV 0.2 while maintaining similar abrasive wear performance as Ti6Al4V. The results point toward laser-based AM for fabricating Ti64-Martian regolith composites with comparable properties. The study also reveals promising results in limiting the mass burden for future space missions, resulting in cheaper and easier launches.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Martian regolith—Ti6Al4V composites via additive manufacturing

Afrouzian

Traxel

Bandyopadhyay

2022

Int J Applied Ceramic Tech

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“…This verifies the calculations accuracy and that most all pores are open. If there was closed porosity the buoyancy of the internal channels would cause the density calculation to have variation (Matyas et al, 2011).…”

Section: Parameters and Propertiesmentioning

confidence: 99%

Laser Engineering Net Shaping of Microporous Ti6Al4V Filters

Gualtieri

Bandyopadhyay

2016

Front. Mech. Eng.

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In many applications, porous metal structures are necessary for proper and optimal function. Yet, these structures can be difficult to build. It is especially difficult if the pore size desired is very fine or on the microscale. For this reason, additive manufacturing processes have been looked at to build these structures. In this study, Laser Engineering Net Shaping (LENS™) processing was experimented with processing interconnected microporous structures. Using Ti6Al4V and only changing processing parameters, porous structures were created having porosity ranging from 21.5 to 15.4%. The microstructure proved to be that of traditional laser processed Ti6Al4V parts. Compression test of these samples showed that the ultimate compressive strength varied from 645 to 556 MPa. Overall, LENS™ proved to be a viable method to make unique interconnected microporous structures that could be easily added to any build without having to change the design.

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