3D-printed PEEK-carbon fiber (CF) composites: Structure and thermal properties

Stepashkin, D. I. Chukov, F. S. Senatov, A. I. Salimon, A. M. Korsunsky, S. D. Kaloshkin

Research output: Contribution to journalArticlepeer-review

131 Citations (Scopus)


CF-PEEK composites were manufactured by 3D-printing using a novel FDM methodology and customized printer and were compared with their cast counterparts. The characterization of composite thermal properties in the range 25–300 °C revealed that 3D-printed CF-PEEK composites manifest 25–30% lower thermal conductivity than cast composites. Short carbon fibers used for reinforcement showed orientation along the polymer flow both in cast and 3-D printed samples causing the anisotropy of thermal properties. The hierarchical nature of 3DP CF-PEEK porosity was observed by SEM imaging, which allowed the identification of large scale inter-layer gaps and cracks, and fine scale intra-layer defects that are likely to be induced by the thermal and mechanical gradients within the deposit that arise during fabrication. Purposeful lay-up of long continuous carbon yarns during 3D-printing opens a way to fabricate tailored mechanical parts with desired anisotropy of properties.

Original languageEnglish
Pages (from-to)319-326
Number of pages8
JournalComposites Science and Technology
Publication statusPublished - 18 Aug 2018


  • A. Carbon fiber
  • A. Polymer-matrix composites (PMCs)
  • B. Thermal properties
  • D. Thermal analysis
  • E. Lay-up (manual/automated)


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