Characterisation of void and fiber distribution in 3D printed carbon-fiber/PEEK using X-ray computed tomography

S. Sommacal; A. Matschinski; K. Drechsler; P. Compston

doi:10.1016/j.compositesa.2021.106487

Characterisation of void and fiber distribution in 3D printed carbon-fiber/PEEK using X-ray computed tomography

S. Sommacal, A. Matschinski, K. Drechsler, P. Compston

Chair of Carbon Composites

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

A detailed analysis of the microstructure of five 3D printed CF/PEEK samples and the commercial feedstock material used to produce them has been conducted by the means of state-of-the-art micro-CT imaging. The images unequivocally show that both feedstock filament and printed samples contain a large quantity of voids heterogeneously distributed. Voids are randomly distributed within the feedstock, while they are aligned in rows parallel to the mould plate within the printed samples. Short fibers are heterogeneously distributed and display a preferential alignment in all specimens. Overall, the results showed that the 3D printing process did not remove the voids originally present in the feedstock filament and varying key printing parameters had only a minor effect on the printed samples’ void content, while the depositional nature of the printing process strongly affected the samples’ internal geometry.

Original language	English
Article number	106487
Journal	Composites Part A: Applied Science and Manufacturing
Volume	149
DOIs	https://doi.org/10.1016/j.compositesa.2021.106487
State	Published - Oct 2021

Keywords

A. Carbon Fibers
B. Porosity
D. CT analysis
E. 3-D Printing

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10.1016/j.compositesa.2021.106487

Cite this

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title = "Characterisation of void and fiber distribution in 3D printed carbon-fiber/PEEK using X-ray computed tomography",

abstract = "A detailed analysis of the microstructure of five 3D printed CF/PEEK samples and the commercial feedstock material used to produce them has been conducted by the means of state-of-the-art micro-CT imaging. The images unequivocally show that both feedstock filament and printed samples contain a large quantity of voids heterogeneously distributed. Voids are randomly distributed within the feedstock, while they are aligned in rows parallel to the mould plate within the printed samples. Short fibers are heterogeneously distributed and display a preferential alignment in all specimens. Overall, the results showed that the 3D printing process did not remove the voids originally present in the feedstock filament and varying key printing parameters had only a minor effect on the printed samples{\textquoteright} void content, while the depositional nature of the printing process strongly affected the samples{\textquoteright} internal geometry.",

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AU - Compston, P.

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Characterisation of void and fiber distribution in 3D printed carbon-fiber/PEEK using X-ray computed tomography

Abstract

Keywords

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