Manufacturing of ceramic components with internal channels by a novel additive/subtractive hybridization process
Raphael de Melo Bernardino,
Saverio Valentino,
Giorgia Franchin,
Jens Günster,
Andrea Zocca
Affiliations
Raphael de Melo Bernardino
Division Ceramic Processing and Biomaterials, Bundesanstalt für Materialforschung und -prüfung (BAM), Unter Den Eichen 44-46, 12203, Berlin, Germany; Institute of Nonmetallic Materials, Clausthal University of Technology, Zehntnerstr. 2a, Clausthal-Zellerfeld, 38678, Germany
Saverio Valentino
Department of Industrial Engineering, University of Padova, Via Marzolo 9, Padova, 35131, Italy
Giorgia Franchin
Department of Industrial Engineering, University of Padova, Via Marzolo 9, Padova, 35131, Italy
Jens Günster
Division Ceramic Processing and Biomaterials, Bundesanstalt für Materialforschung und -prüfung (BAM), Unter Den Eichen 44-46, 12203, Berlin, Germany; Institute of Nonmetallic Materials, Clausthal University of Technology, Zehntnerstr. 2a, Clausthal-Zellerfeld, 38678, Germany
Andrea Zocca
Division Ceramic Processing and Biomaterials, Bundesanstalt für Materialforschung und -prüfung (BAM), Unter Den Eichen 44-46, 12203, Berlin, Germany; Corresponding author.
A new approach for fabrication of ceramic components with inner channels is proposed, as a result of the combination of two additive and one subtractive manufacturing processes. In this project, porcelain parts are manufactured by the Layerwise Slurry Deposition (LSD) process, meanwhile end milling and Direct Ink Writing (DIW) are applied to create channels on the surface of the deposited ceramic. Unique to the LSD process is the formation of a freestanding powder bed with a mechanical strength comparable to conventional slip casted ceramic green bodies. Combining these three processes allows the manufacturing of ceramic objects containing an internal path of ink, which in this case was a graphite-based ink that can be further eliminated by heat treatment to obtain a porcelain object embedded with channels. The results show the capabilities of this method and its potential to fabricate not only parts with inner channels, but also multi-material and multi-functional components (such as integrated electronic circuits).
