Screw extrusion-based additive manufacturing of PEEK

Jian Wei Tseng, Chao Yuan Liu, Yi Kuang Yen, Johannes Belkner, Tobias Bremicker, Bernard Haochih Liu, Ta Ju Sun, An Bang Wang

研究成果: Article同行評審

107 引文 斯高帕斯(Scopus)

摘要

Polyether-ether-ketone (PEEK) has high mechanical strength, thermal performance, and biocompatibility, and is widely used in biomedical and chemical engineering applications. However, to date there are no guidelines for the building of a 3D printer for highly viscous materials, e.g., PEEK. In this paper, a screw extrusion method was developed to overcome the existing problems of the filament-feeding method. Excellent flow stability (< 3% variation) and high printing speed (up to 370 mm/s) for PEEK printing were achieved. Highly reproducible mechanical tests of the printing products were demonstrated with 96% of the bulk material strength for the first time. Furthermore, an exchangeable printing head was built to cover both line- and plane-printing needs to widen its applications and improve printing surface quality (up to 0.945 nm in Ra). All printed material had a more brittle character in comparison with the bulk material and the post annealing process was found to have no significant effect on the mechanical strength. Additionally, porous artificial intervertebral cages with controllable size and distribution were manufactured to demonstrate potential applications.

原文English
頁(從 - 到)209-221
頁數13
期刊Materials and Design
140
DOIs
出版狀態Published - 2018 2月 15

All Science Journal Classification (ASJC) codes

  • 一般材料科學
  • 材料力學
  • 機械工業

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