Why delamination cracks occur in ceramics manufactured via DLP, and how to eliminate them?
YARED W. 1
1 IFKB - Universität Stuttgart, Stuttgart, Germany
Digital Light Processing (DLP) of ceramics allows the creation of ceramic parts with unprecedented resolution for various applications, from medical tooling to archeological restoration. However, the manufacturing of a crack-free sintered ceramic part using DLP has been an arduous challenge in both industrial and academic research. Thus, as a result of numerous experimental and analytical studies, this contribution provides a guide for the elimination of delamination cracks in sintered ceramic parts manufactured via vat-photopolymerization. Photo-rheology, UV/Vis spectrophotometry and multiple microscopy techniques were used to critically analyze the formation of delamination cracks, their culprits and the possible methods to eliminate such cracks. It was found that proper particle dispersion, sufficient air extraction, optimized resin formulation, optimized printing parameters and sound design principles jointly contribute to the manufacturing of a delamination cracks-free ceramic part using DLP. In this oral contribution, the author will address each one of the aforementioned factors from a practitioner’s perspective, offering practical knowledge for a more successful additive manufacturing of ceramics using DLP.