Sintering of micro-trusses created by extrusion-3D-printing of lunar regolith inks

Shannon L. Taylor, Adam E. Jakus, Katie D. Koube, Amaka J. Ibeh, Nicholas R. Geisendorfer, Ramille N. Shah, David C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The development of in situ fabrication methods for the infrastructure required to support human life on the Moon is necessary due to the prohibitive cost of transporting large quantities of materials from the Earth. Cellular structures, consisting of a regular network (truss) of micro-struts with ∼500 μm diameters, suitable for bricks, blocks, panels, and other load-bearing structural elements for habitats and other infrastructure are created by direct-extrusion 3D-printing of liquid inks containing JSC-1A lunar regolith simulant powders, followed by sintering. The effects of sintering time, temperature, and atmosphere (air or hydrogen) on the microstructures, mechanical properties, and magnetic properties of the sintered lunar regolith micro-trusses are investigated. The air-sintered micro-trusses have higher relative densities, linear shrinkages, and peak compressive strengths, due to the improved sintering of the struts within the micro-trusses achieved by a liquid or glassy phase. Whereas the hydrogen-sintered micro-trusses show no liquid-phase sintering or glassy phase, they contain metallic iron 0.1–2 μm particles from the reduction of ilmenite, which allows them to be lifted with magnets.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalActa Astronautica
Volume143
DOIs
StatePublished - Feb 2018

Keywords

  • 3D printing
  • Additive manufacturing
  • JSC-1A
  • Lunar regolith
  • Reduction
  • Sintering

ASJC Scopus subject areas

  • Aerospace Engineering

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    Taylor, S. L., Jakus, A. E., Koube, K. D., Ibeh, A. J., Geisendorfer, N. R., Shah, R. N., & Dunand, D. C. (2018). Sintering of micro-trusses created by extrusion-3D-printing of lunar regolith inks. Acta Astronautica, 143, 1-8. https://doi.org/10.1016/j.actaastro.2017.11.005