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S. Baumgartner, J.-A. Schönherr, A. Schedle, J. Stampfl:
"Precision of Stereolithography-based additive manufactured ceramic parts";
Talk: 6th International Conference on Additive Technologies iCAT 2016, Nürnberg; 11-29-2016 - 11-30-2016; in: "6th International Conference on Additive Technologies iCAT 2016", (2016), 412 - 414.

Additive manufacturing technologies have become very useful in several individual applications such as medical healthcare. At TU Wien we developed a stereolithography-based method to produce parts out of different ceramic materials (SLCM). With this it is possible to structure ceramic filled slurries with a solid loading of more than 50 vol.% and therefore high viscosities and get parts with mechanical properties similar to conventionally produced ceramics.
Using raw materials with specific characteristics in terms of particle size and new slurry formulas, it was possible to produce solid bulk glass ceramics as well as replicating the microstructure of human trabecular bone. Resulting parts had a density of about 99.5% (Zirconia) and an outstanding biaxial bending strength of 1098±169 MPa (Zirconia).
We demonstrate an improvement of the whole process chain beginning with support structures that provide optimal building conditions and at the same time reduce the sinter distortion. Moreover we attempt to reduce the influence of z-overexposing and to find the optimal shrinkage parameters. This study shows the possibilities and current limitations of structuring ceramic slurries using SLCM by comparing the fitting of stereolithographic manufactured parts to the original digital file.

additive manufacturing technologies (AMT), stereolithography, ceramic, precision