About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
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ACerS-ECerS Joint Symposium: Emerging Leaders in Glass and Ceramics
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| Presentation Title |
2PP of Technical Ceramic – What’s Next? |
| Author(s) |
Johanna Mueller Elmau, Brian Pauw, Birte Riechers, Julian M. Rosalie, T, Rousseau, Jens Günster |
| On-Site Speaker (Planned) |
Johanna Mueller Elmau |
| Abstract Scope |
Two-photon-polymerization (2PP) is the AM-technology with the highest volumetric resolution and was successfully applied to technical ceramics like yttria-stabilized zirconia (3YSZ) by utilizing a nanoparticle transparent photocurable feedstock. It is transparent even with up to 80wt% of particles. With that a resolution of 500m was achieved, so far, the smallest for technical ceramics.
This success was granted with 1,9 Mio € for a 5-year junior research group, which has the aim to solve fundamental scientific questions and to prepare path for technology transfer:
1. Defining the mechanical properties: Micromechanical testing is conducted with nano-indentation techniques to assess the compressive strength of 2PP printed sintered YSZ. Even more interestingly, the nanostructures can undergo plastic deformation depending on the chosen geometry, printing style and sintering temperature. The goal is to fully use the geometrical freedom of 2PP to create ceramic parts with unmatched mechanical properties, e.g. for dental implants.
2. Investigating the sintering behavior of the nanoparticles: Although sintering behavior of nanoparticles is widely studied and differs from classical ceramic powders, the aim is finding the perfect sintering condictiones for these particular nanoparticles to gain highest transparency for optical components. We utilized TEM, in-situ TEM as well as SAXS and in-situ SAXS measurements to get a full picture of particle growth and reorganization.
3. Printing bigger: Printing millimeters with 2PP quickly exceeds days and therefore will not be economically feasible. Proof of concepts are created to create optically active areas on UV-Sheets by creating surface structures as well as free standing ceramic structures in the millimeter range. To reach centimeters 2PP will be hybridized with DLP/LCM using the same feedstock. The combined structures shrink together during debinding and sintering.
4. Implementing a digital workflow: FAIR data is the foundation for digital material science, but the data needs to be collected first. The goal is to fully digitalize the process chain of 2PP-printed ceramics, connecting feedstock preparation with printing, post processing and analysis. First steps were done creating an tablet user interface, which shall replace paper lab note books. |