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Article

3D PEEK Objects Fabricated by Fused Filament Fabrication (FFF)

1
Department for 3D Printing Materials, Korea Institute of Materials Science, Changwon 51508, Korea
2
Defense Space Technology Center, Agency for Defense Development, Daejeon 34186, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Antonino Recca
Materials 2022, 15(3), 898; https://doi.org/10.3390/ma15030898
Received: 5 December 2021 / Revised: 20 January 2022 / Accepted: 21 January 2022 / Published: 25 January 2022
(This article belongs to the Section Manufacturing Processes and Systems)
PEEK (poly ether ether ketone) materials printed using FFF 3D printing have been actively studied on applying electronic devices in satellites owing to their excellent light weight and thermal resistance. However, the PEEK FFF process generated cavities inside due to large shrinkage has degraded both mechanical integrity and printing reliability. Here, we have investigated the correlations between nozzle temperatures and PEEK printing behaviors such as the reliability of printed line width and surface roughness. As the temperature increased from 360 to 380 °C, the width of the printed line showed a tendency to decrease. However, the width of PEEK printed lines re-increased from 350 to 426 μm at the nozzle temperatures between 380 and 400 °C, associated with solid to liquid-like phase transition and printed out distorted and disconnected lines. The surface roughness of PEEK objects increased from 49 to 55 μm as the nozzle temperature increased from 380 to 400 °C, where PEEK is melted down and quickly solidified based on more energy and additional heating time at higher printing temperatures at 400 °C. Based on these printing trends, a reliability analysis of the printed line was performed. The printed line formed the most uniform width at 380 °C and had a highest Weibull coefficient of 28.6 using the reliability analysis technique called Weibull modulus. View Full-Text
Keywords: 3D printing; fused filament fabrication; poly ether ether ketone; LEO aerospace; Weibull modulus; reliability 3D printing; fused filament fabrication; poly ether ether ketone; LEO aerospace; Weibull modulus; reliability
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MDPI and ACS Style

Baek, I.; Kwon, O.; Lim, C.-M.; Park, K.Y.; Bae, C.-J. 3D PEEK Objects Fabricated by Fused Filament Fabrication (FFF). Materials 2022, 15, 898. https://doi.org/10.3390/ma15030898

AMA Style

Baek I, Kwon O, Lim C-M, Park KY, Bae C-J. 3D PEEK Objects Fabricated by Fused Filament Fabrication (FFF). Materials. 2022; 15(3):898. https://doi.org/10.3390/ma15030898

Chicago/Turabian Style

Baek, Inwoo, Oeun Kwon, Chul-Min Lim, Kyoung Youl Park, and Chang-Jun Bae. 2022. "3D PEEK Objects Fabricated by Fused Filament Fabrication (FFF)" Materials 15, no. 3: 898. https://doi.org/10.3390/ma15030898

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