Variation of density in additive manufacturing of ceramic parts: A review

Abstract

Along with extensive research on the three-dimensional (3D) printing of polymers and metals, 3D printing of ceramics is now the latest trend in manufacturing. Many 3D printing processes have been used for fabricating ceramic parts, Out of which Direct Ink Writing (DIW) is quite cheaper and widely used method in which slurry is extruded through a nozzle and then part is sintered. In this article authors reviewed the variation in densities of different ceramic materials which was printed by DIW process. Many input variables which affect the density of the parts, out of which, Sintering temperature and additives have major contribution to vary the density. By controlling these variables porosity and density of parts can be varied according to application. Rheological properties like, viscosity, fluidity etc. of slurry play a vital role in dimensional stability of part. Macro porous and dimensionally correct ceramic structures and scaffolding can be produced by controlling these properties. © 2021 Elsevier Ltd.