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X-CT scanning of printed PEEK and CF/PEEK composites. Left (a–d): before bending; right (e–h): after bending. (a) (b) illustrate the horizontally printed parts and (c) (d) are the vertically printed parts. The Z-axis is building orientation, and the dark brown parts are pores. As for the horizontal and vertical parts, the external force is along the opposite direction of the Z-axis and the direction of the Y-axis, respectively.
