3D-printing of ceramic filaments with ductile metallic cores

The additive manufacturing of composite structures can open possibilities in the design and fabrication 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). approach is based on micro-extrusion ceramic–metal filaments core–shell layered arrangements. These are employed dense light-weight cellular that combine stiffness strength shell fracture resistance energy absorption capabilities provided by metal core. be used extrude thin porous interlayers separating core shells create a weak fibre/matrix interphase. fabricated these exhibit higher compressive strengths than those from pure ceramics. works one two orders magnitude above (103 J/m2) while bending remain comparable 3D printed alumina (200–350 MPa). technique could easily extended other material combinations opening opportunities multi-material parts devices.