Process-Induced Fiber Orientation in Fused Filament Fabrication
Abstract
As the applications for additive manufacturing have continued to grow, so too has the range of available materials, with more functional or better performing materials constantly under development. This work characterizes a copper-filled polyamide 6 (PA6) thermoplastic composite designed to enhance the thermal conductivity of fused filament fabrication (FFF) parts, especially for heat transfer applications. The composite was mixed and extruded into filament using twin screw extrusion. Because the fiber orientation within the material governs the thermal conductivity of the material, the orientation was measured in the filament, through the nozzle, and in printed parts using micro-computed tomography. The thermal conductivity of the material was measured and achieved 4.95, 2.38, and 0.75 W/(m·K) at 70 °C in the inflow, crossflow, and thickness directions, respectively. The implications of this anisotropy are discussed using the example of an air-to-water crossflow heat exchanger. In conclusion, the lower conductivity in the crossflow direction reduces thermal performance due to the orientation in thin-walled parts.
- Publication Date:
- Research Org.:
- Univ. of Wisconsin-Madison, Madison, WI (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1462765
- Alternate Identifier(s):
- OSTI ID: 1462961
- Grant/Contract Number:
- AR0000573
- Resource Type:
- Published Article
- Journal Name:
- Journal of Composites Science
- Additional Journal Information:
- Journal Name: Journal of Composites Science Journal Volume: 2 Journal Issue: 3; Journal ID: ISSN 2504-477X
- Publisher:
- MDPI AG
- Country of Publication:
- Switzerland
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; thermal conductivity; fiber orientation; composite; filler; heat exchanger; copper
Citation Formats
Mulholland, Tom, Goris, Sebastian, Boxleitner, Jake, Osswald, Tim, and Rudolph, Natalie. Process-Induced Fiber Orientation in Fused Filament Fabrication. Switzerland: N. p., 2018.
Web. doi:10.3390/jcs2030045.
Mulholland, Tom, Goris, Sebastian, Boxleitner, Jake, Osswald, Tim, & Rudolph, Natalie. Process-Induced Fiber Orientation in Fused Filament Fabrication. Switzerland. doi:https://doi.org/10.3390/jcs2030045
Mulholland, Tom, Goris, Sebastian, Boxleitner, Jake, Osswald, Tim, and Rudolph, Natalie. Thu .
"Process-Induced Fiber Orientation in Fused Filament Fabrication". Switzerland. doi:https://doi.org/10.3390/jcs2030045.
@article{osti_1462765,
title = {Process-Induced Fiber Orientation in Fused Filament Fabrication},
author = {Mulholland, Tom and Goris, Sebastian and Boxleitner, Jake and Osswald, Tim and Rudolph, Natalie},
abstractNote = {As the applications for additive manufacturing have continued to grow, so too has the range of available materials, with more functional or better performing materials constantly under development. This work characterizes a copper-filled polyamide 6 (PA6) thermoplastic composite designed to enhance the thermal conductivity of fused filament fabrication (FFF) parts, especially for heat transfer applications. The composite was mixed and extruded into filament using twin screw extrusion. Because the fiber orientation within the material governs the thermal conductivity of the material, the orientation was measured in the filament, through the nozzle, and in printed parts using micro-computed tomography. The thermal conductivity of the material was measured and achieved 4.95, 2.38, and 0.75 W/(m·K) at 70 °C in the inflow, crossflow, and thickness directions, respectively. The implications of this anisotropy are discussed using the example of an air-to-water crossflow heat exchanger. In conclusion, the lower conductivity in the crossflow direction reduces thermal performance due to the orientation in thin-walled parts.},
doi = {10.3390/jcs2030045},
journal = {Journal of Composites Science},
number = 3,
volume = 2,
place = {Switzerland},
year = {2018},
month = {8}
}
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DOI: https://doi.org/10.3390/jcs2030045
DOI: https://doi.org/10.3390/jcs2030045
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Works referencing / citing this record:
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