Additive Manufacturing of Syntactic Foams: Part 1: Development, Properties, and Recycling Potential of Filaments
| Autor: | Nikhil Gupta, Mrityunjay Doddamani, Ashish Kumar Singh, Balu Patil, Brooks Saltonstall, Niklas Hoffmann |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Syntactic foam General Engineering Fused filament fabrication 02 engineering and technology Molding (process) Strain rate 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Cenosphere Ultimate tensile strength General Materials Science Extrusion High-density polyethylene Composite material 0210 nano-technology |
| Zdroj: | JOM. 70:303-309 |
| ISSN: | 1543-1851 1047-4838 |
| DOI: | 10.1007/s11837-017-2734-7 |
| Popis: | This work focuses on developing filaments of high-density polyethylene (HDPE) and their hollow particle-filled syntactic foams for commercial three-dimensional (3D) printers based on fused filament fabrication technology. Hollow fly-ash cenospheres were blended by 40 wt.% in a HDPE matrix to produce syntactic foam (HDPE40) filaments. Further, the recycling potential was studied by pelletizing the filaments again to extrude twice (2×) and three times (3×). The filaments were tensile tested at 10−4 s−1, 10−3 s−1, and 10−2 s−1 strain rates. HDPE40 filaments show an increasing trend in modulus and strength with the strain rate. Higher density and modulus were noticed for 2× filaments compared to 1× filaments because of the crushing of some cenospheres in the extrusion cycle. However, 2× and 3× filament densities are nearly the same, showing potential for recycling them. The filaments show better properties than the same materials processed by conventional injection molding. Micro-CT scans show a uniform dispersion of cenospheres in all filaments. |
| Databáze: | OpenAIRE |
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