TY  - BOOK
AU  - Desai, Dhanashri Tejpal
AU  - Kumar, Aloke advised
TI  - 3D-Printing of lunar soil simulant by direct-extrusion method
U1  - 620 
PY  - 2023///
CY  - Bangalore
PB  - IISc
KW  - Direct-extrusion 3D-Printing
KW  - Cellular Ceramics
KW  - Tool-path planning
KW  - extrusion-based additive manufacturing
N1  - include bibliographic reference and index; MTech (Res); 2023; Mechanical engineering
N2  - The extrusion-based additive manufacturing (EAM) technique is recently being widely employed for the 3D printing of complex-shaped components made of ceramic powder (containing irregular-shaped particles) when it is cast in the form of a slurry/ink. In this work, we utilize a direct extrusion method for printing structures from extra-terrestrial soil simulants using a piston-based extruder. Printing is demonstrated using a slurry composed of lunar soil simulant (LSS) variant ISAC-1 (avg. particle size ~ 90µm) mixed with biopolymer guar gum as a sustainable binding agent and DI water as a solvent. Parts were printed using a 2 mm diameter nozzle by optimizing print speed, nozzle height, inter-layer drying time, and build temperature, to ensure shape retention post-printing. The final green parts were dried in a hot air oven (50°C) for 48hrs, followed by sandpaper polishing. The strengths of the printed specimens were evaluated using compression and flexure tests and were found to be comparable to that of bio-consolidated structures. Unlike solid geometries, the well-known shell-infill type area-filling strategy generated several travels and re-tracings in the toolpath for cellular geometries
UR  - https://etd.iisc.ac.in/handle/2005/6172
ER  -