Ceramic Foams with Controlled Geometries Through 3D‐Printed Sacrificial Templates

Powder‐based 3D printing was combined with sacrificial templating to realize highly porous yttria‐stabilized ZrO 2 (YSZ) ceramic foam objects with well‐defined geometries. The porous sacrificial template is 3D printed using poly(methyl methacrylate) powder. Various methods are evaluated to optimize ceramic slurry infiltration into the 3D‐printed template and subsequent burn‐out. The optimized method yields ceramic foam objects with an open porosity of >66% and replicates the geometry of the 3D‐printed template with high fidelity.