Shaping of complex ceramic parts by several additive manufacturing processes
Résumé
Conventional manufacturing techniques of ceramics are time-consuming and show several limitations. To tackle the drawbacks associated with conventional techniques, additive manufacturing technologies are developed to shape ceramic parts. The presentation focuses on several additive manufacturing methods investigated in the framework of the Marie Sklodowska-Curie H2020 project called “Development Of Ceramics 3D-Printing, Additive Manufacturing” (DOC-3D-Printing).
This talk highlights the main achievements of 3 PhD carried out within the GIS TechCera.
Digital Light Processing-based approach was investigated to produce β-tricalcium phosphate (β-TCP, β-Ca3(PO4)2) parts. The relevant parameters for achieving a slurry with a high loading of β-TCP particles and suitable to be employed with stereolithography, were defined. The influence of several processing parameters on the main characteristics of printed parts is highlighted.
Direct Ink Writing approach was also investigated to produce macroporous parts in pure and doped β-TCP. The whole processing chain including slurry formulation, printing by robocasting, osmotic drying and sintering, is described.
Finally, a new concept of hybrid subtractive/additive manufacturing system has been developed, integrating a pulsed laser in a modified binder jetting machine. The influence of the powder characteristics and the printing conditions, to produce alumina (Al2O3) parts, are discussed.
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 764935.