Journal
COMPOSITES PART B-ENGINEERING
Volume 210, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.108652
Keywords
Continuous carbon fibre reinforced composite; Fused filament fabrication; Porosity; Post-processing; Interlaminar properties
Funding
- Spanish Ministry of Science and Innovation [RTI2018-094435-B-C33]
- Sistema Nacional de Garantia Juvenil from Autonomous Community of Madrid, Spain [PEJD2017-POST/IND-4401]
- Spanish Ministry of Education, Culture and Sports [FPU16/02223]
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The study analyzed the effects of post-processing temperature on 3D printed CCFRC, finding that treatment at 150 degrees Celsius significantly reduced porosity and increased interlaminar strength without altering dimensions, which contributed to the overall enhancement of mechanical properties.
3D printing of continuous carbon fibre reinforced composites (CCFRC) based on fused filament fabrication (FFF) has a great potential for reproducing robust and complex geometries, generating little waste. However, 3D printed CCFRC present relatively poor interlaminar bonding and high void content in comparison to traditional composites. This work analyses the post-processing temperature effects on microstructure, interlaminar properties and thermal stability of the printed CCFRC. Treated pieces at 150 degrees C showed a reduction of porosity by approximately 87% and improved interlaminar strength by 145%, without modifying nominal dimensions. In addition, the increase in T-g (from 109 degrees C to 131 degrees C) is ascribed to a drying effect during the post-processing, which reduces the plasticisation of the treated parts and contributes to the general enhancement of mechanical properties of printed CCFRC coupons. The proposed post-processing moves this technology towards the development of functional composite components for high-performance structural applications.
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