Yu Liu, Juan Hou. Forming Defects and Its Influence on Mechanical Properties of Polyetheretherketone Manufactured by Selective Laser Sintering[J]. Chinese Journal of Lasers, 2023, 50(20): 2002305
- Chinese Journal of Lasers
- Vol. 50, Issue 20, 2002305 (2023)
Fig. 1. Morphology of PEEK HP3 powder particles
Fig. 2. Schematics of samples. (a) Shape and size of samples; (b) forming direction and location of samples
Fig. 3. DSC curves for SLS PEEK HP3
Fig. 4. Aggregation structure of SLS PEEK. (a) Low magnification; (b) high magnification
Fig. 5. Tensile properties of SLS PEEK and IM PEEK. (a) Ultimate tensile strength; (b) tensile curve
Fig. 6. Flexural properties of SLS PEEK and IM PEEK
Fig. 7. Visualized CT data.(a) Scanning volume diagram; (b) cloud diagram of overall defect; (c) hemispherical defects; (d) boundary defects; (e) pore defects
Fig. 8. Microtopographies of hemispherical defects in visual CT. (a) 3D view; (b) top view; (c) side view; (d) front view
Fig. 9. Microtopographies of boundary defects in visual CT. (a) 3D view; (b) top view; (c) side view; (d) front view
Fig. 10. Microtopographies of pore defects in visual CT. (a) 3D view; (b) top view; (c) side view; (d) front view
Fig. 11. Statistic of defect characteristics. (a) Relative quantity distribution; (b) sphericity distribution; (c) total volume distribution; (d) average volume distribution
Fig. 12. Statistic of porosity distribution. (a) Relationship between porosity and printing height; (b) relationship between porosity and sample thickness
Fig. 13. Sintering and defect morphologies at different magnifications (XOY plane). (a)(b) Morphologies of powder sintering; (c)(d) morphologies of boundary sintering; (e)(f) morphologies of hemispherical defect
Fig. 14. Tensile specimens and fractures. (a) SLS PEEK defect area shown in Micro-CT; (b) SEM image of SLS PEEK fracture; (c) SEM image of IM PEEK fracture
Fig. 15. Regions of flexural failure. (a) Fractured surface; (b) ductile region; (c) initiation region (crack propagation direction is from bottom to top)
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Table 1. Thermal properties and crystallinity of PEEK
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