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Controllable interlayer shear strength and crystallinity of PEEK components by laser-assisted material extrusion

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Abstract

Laser-assisted material extrusion was used in this study to realize high-performance 3D printing of semicrystalline polymers. A CO2 laser device was simply integrated into a traditional fused deposition modeling printer to supply the laser. The sample’s surface temperature was changed by controlling the laser power during printing, and thus the interlayer shear strength and crystallinity could both be effectively controlled. By implementing the laser-assisted process, the optimal interlayer shear strength of poly(ether ether ketone) (PEEK) could be improved by more than 45%, and the degree of crystallinity of PEEK was simultaneously improved by up to 34.5%, which has approached to the typical crystallinity of 35%. Therefore, the process provides a very effective solution for additive manufacturing of semicrystalline materials and helps clearly to establish a controllable mapping relationship between the laser parameters and material properties.

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ACKNOWLEDGMENTS

This work was supported by the National Natural Science Foundation of China (No. 51575430) and National Key Research and Development Program of China (Nos. 2017YFB1103401 and 2016YFB1100902).

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  1. State Key Laboratory of Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

    Meng Luo, Xiaoyong Tian, Weijun Zhu & Dichen Li

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  1. Meng Luo
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  2. Xiaoyong Tian
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Correspondence to Xiaoyong Tian.

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Luo, M., Tian, X., Zhu, W. et al. Controllable interlayer shear strength and crystallinity of PEEK components by laser-assisted material extrusion. Journal of Materials Research 33, 1632–1641 (2018). https://doi.org/10.1557/jmr.2018.131

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