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Article Dans Une Revue Materials & Design Année : 2023

3D-printing of ceramic filaments with ductile metallic cores

Résumé

The additive manufacturing of composite structures can open possibilities in the design and fabrication of devices but also demands new approaches. In this work, we use thermally reversible pastes to fabricate ceramic matrix (Al2O3) composites reinforced with continuous metallic fibres (steel). The approach is based on the micro-extrusion of ceramic-metal filaments with core-shell and layered arrangements. These filaments are used in the additive manufacturing of dense and lightweight cellular structures that combine the stiffness and strength of the ceramic shell with the fracture resistance and energy absorption capabilities provided by the metal core. The approach can be used to extrude filaments with thin porous interlayers separating the core and the shells to create a weak fibre/matrix interphase. The cellular structures fabricated with these filaments exhibit higher compressive strengths and energy absorption capabilities than those fabricated from pure ceramics. The works of fracture of the dense composites are one to two orders of magnitude above those of the ceramic matrix (10 3 J/m 2) while the bending strengths remain comparable to those of 3D printed alumina (200-350 MPa). The technique could be easily extended to other material combinations opening new opportunities in the additive manufacturing of multi-material parts and devices.
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Dates et versions

hal-03954724 , version 1 (24-01-2023)

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Qiaosong Cai, Sylvain Meille, Jérôme Chevalier, Shitong Zhou, Florian Bouville, et al.. 3D-printing of ceramic filaments with ductile metallic cores. Materials & Design, 2023, 225, pp.111463. ⟨10.1016/j.matdes.2022.111463⟩. ⟨hal-03954724⟩
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