3D Printing of Calcia-Based Ceramic Core Composites

Abstract

Three-dimensional printing has been used as a rapid freeform fabrication process to fabricate a wider range of green ceramic components with complex structures difficult to obtain using traditional ceramic fabrication process. In this study, calcia-based ceramic core composites were fabricated by three dimensional printing and sintering operation. The green bodies were printed using a CaO/TiO2powder mixture as a precursor material and ethylene glycol as a binder. They were sintered at 1400-1500 °C for 2 h. The phases and microstructures of these samples were characterized by X-ray diffraction and scanning electron microscopy. The effect of TiO2content and the sintering temperature on the density, hydration resistance and bending strength of the sintered bodies was investigated. It was found that increment of TiO2content and sintering temperature would result in an increase of density of the sintered bodies and then increase of hydration resistance and bending strength.

Fabrication of silica-based ceramic cores with internal lattice structures by stereolithography

“…The limitations of conventional forming methods can be improved through additive manufacturing (AM) approaches. 3D printing and layered extrusion forming techniques have been applied in the fabrication of complex-shaped cores of calcia-based and aluminabased ceramics [4][5][6][7] . High-performance silica-based cores have also been fabricated by selective laser sintering combined with vacuum infiltration process [8] .…”