Advanced materials and composites
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Abstract
Abstract
Abstract Sinter-based additive manufacturing of tungsten carbide (WC-Co) hardmetals offers a promising route for producing complex, near-net-shape components. However, non-uniform shrinkage and high porosity remain critical challenges that compromise the mechanical performance of printed WC-Co parts. In this study, WC-Co components were fabricated using Fused Filament Fabrication (FFF) with a highly metal-filled filament containing 93.5 wt.% WC-Co, corresponding to an estimated solid loading of approximately 50 vol.%. The effects of printing, debinding, and sintering parameters on porosity, densification, and mechanical properties were systematically investigated. A two-step debinding strategy enabled effective binder removal without cracking, while optimized multi-stage sintering cycles at 1430-1450 °C produced dense microstructures with porosity as low as 0.92%. The best-performing samples achieved a Vickers hardness of 1703 HV10 and a transverse rupture strength of 1750 MPa, exceeding values typically reported for conventionally processed WC-Co.
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@article{Zheng2026Additive,
title = {Additive Manufacturing of WC-10Co Hardmetals via Fused Filament Fabrication: Pathway to High Transverse Rupture Strength},
author = {Ying Zheng and Wolfgang Hofmann and Rudi Simon and Peter Würtele and Klaus Trott and Uwe Glatzel and Haneen Daoud},
journal = {Journal of Materials Engineering and Performance},
year = {2026},
doi = {10.1007/s11665-026-15300-0},
url = {https://doi.org/10.1007/s11665-026-15300-0}
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