| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Preceramic Polymers; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
Embedded Direct Ink Writing of Freeform Ceramic Components |
| Author(s) |
Kai Huang, Hamada Elsayed, Giorgia Franchin, Paolo Colombo |
| On-Site Speaker (Planned) |
Kai Huang |
| Abstract Scope |
Direct ink writing, a widely used additive manufacturing technique, has some disadvantages in fabricating suspended ceramic structures due to instabilities in the ink caused by gravity forces, requiring a strict optimization of the rheology of the feedstock. To overcome this problem, freeform 3D printing was achieved in this work by performing printing inside a supporting medium. The rheological properties of the supporting medium as well as the printability of the ink as a function of the solid content were investigated. Printing parameters such as gas pressure and nozzle movement speed were optimized. Several suspended structures were fabricated, such as coils and hollow cylinders, showing no shape distorting both after printing and pyrolysis. Besides preceramic polymer, we also demonstrated that with this approach it is possible to print using inks containing either metal or ceramic powders, thereby showcasing the large potential of this approach for being used in different applications. |