„How can multi-material 3D printing contribute to improve damage tolerance in technical ceramics? The answer lies in a selective management of porous areas within the same functional part, as the controlled lowering of density in exactly defined regions has proven to strongly influence the behaviour of crack propagation. This has been made possible by the additive manufacturing of porous-dense components on a Lithoz CeraFab Multi 2M30 printer. After alumina test samples with discrete and gradient material transitions were compared
in their behaviour when exposed to thermal shock ΔT ~300 °C, a final design of alumina welding nozzles with a defined layer of porous alumina was chosen to closely examine the differences compared to the same part printed as a monolithic dense component. While adding the benefit of lightweight design, the weak and porous regions in the multi-material component improved the damage tolerance of the nozzle.“
17
Mar.
17.03.-19.03.2026