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Effect of processing parameters on flexural properties of 3D-printed polyetherketoneketone using fused deposition modeling |
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| Authors: | Chen Xu Kangjie Cheng Yunfeng Liu Russell Wang Xianfeng Jiang Xingtao Dong Xu Xu |
| Affiliation: | 1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China;2. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, China National International Joint Research Center of Special Purpose Equipment and Advanced Processing Technology, Zhejiang University of Technology, Hangzhou, China;3. Department of Comprehensive Care, Case Western Reserve University School of Dental Medicine, Cleveland, Ohio, USA;4. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, China;5. Department of Stomatology, People's Hospital of Quzhou, Quzhou, China |
| Abstract: | Polyetherketoneketone (PEKK) is an engineering plastic with ultrahigh mechanical performance and has attracted considerable attention in the medical and technical fields. Printing parameters during fused deposition modeling (FDM) for PEKK have a significant impact on final part quality. In this study, a relationship between the process parameters and flexural properties of PEKK was investigated by conducting three-point bending tests, and scanning electron microscopy was employed to analyze the microstructure of fracture surfaces. Nozzle temperature, layer thickness, and infill density affected flexural properties by changing the porosity and interlayer bonding strength. Interlayer separation is the main failure mode of the upright orientation samples, while intralayer failure is likely to occur in the on-edge orientation samples. The flexural properties of FDM-printed PEKK under optimum parameters are comparable to those of mandibular bones, indicating that PEKK is a potential candidate for repairing mandibular defects. The results highlighted in this study are fundamental to the optimal design of complex ultralight, highly efficient structures. |
| Keywords: | flexural properties fused deposition modeling polyetherketoneketone process parameters scanning electron microscopy |