Influence of tensile edge design and printing parameters on the flexural strength of ZrO2 and ATZ bars prepared by UV-LCM-DLP

Abstract

Lithography based Ceramics Manufacturing (LCM), i.e., Digital Light Processing (DLP) is one of the Additive Manufacturing (AM) techniques that is being widely used for the production of ceramic parts. Additionally, the development of photocurable slurries and the influence of the printing parameters on the fabricated parts properties are also receiving high attention. In this work, ZrO2 and ATZ materials were used as a case of study to evaluate the flexural strength of the fabricated parts, using our own developed UV-curable slurries. The influence of the tensile edges shape of the bars, tilting speeds, layer thickness and printing direction were evaluated, obtaining the highest flexural strength values for the 200 ​μm round shape bars, faster tilting speeds, 25 ​μm layer thickness and printing in the Z direction for ZrO2 and in the Y for ATZ.