Schlicht S, Drummer D (2026)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2026
Book Volume: 143
Pages Range: 335-338
DOI: 10.1016/j.procir.2026.07.070
Open Access Link: https://doi.org/10.1016/j.procir.2026.07.070
The processing of high-melting thermoplastics in laser-based additive manufacturing processes is inherently impaired through the requirement of high ambient temperatures for the deceleration of isothermal crystallization processes, while incident focal intensities are limited by thermal degradation upon exposure. To overcome prevailing limitations, we demonstrate the coalescence of polyetheretherketone-carbon fiber (PEEK/CF) composites at a powder bed temperature of 50 °C through fractal, locally discrete exposure strategies and quasi-simultaneous exposure regimes based on the intermediate spatio-temporal discretization of formed melt pools. Elevated numbers of exposure cycles allow for the generation of dense composites under minimized degradation, with ATR-FTIR indicating the absence of fluorenone-forming conditions upon exposure. Obtained results indicate a positive correlation of the fraction of CF and the quasi-simultaneous exposure time required for coalescence, while elevated CF fractions impair the impregnation of embedded fibers. Quasi-simultaneous strategies hence enable the cold powder bed fusion of PEEK through the intermediate formation of discrete fractal melt pools and the subsequent fusion of crystallized sub-structures.
APA:
Schlicht, S., & Drummer, D. (2026). Quasi-simultaneous, discretized low temperature powder bed fusion of optically dense PEEK/CF composites. Procedia CIRP, 143, 335-338. https://doi.org/10.1016/j.procir.2026.07.070
MLA:
Schlicht, Samuel, and Dietmar Drummer. "Quasi-simultaneous, discretized low temperature powder bed fusion of optically dense PEEK/CF composites." Procedia CIRP 143 (2026): 335-338.
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