| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Slurry-based Binder Jetting of Ceramic Casting Cores |
| Author(s) |
Patricia Erhard, Daniel Günther |
| On-Site Speaker (Planned) |
Patricia Erhard |
| Abstract Scope |
The production of complex sand cores to represent internal contours in castings is typically achieved by powder-based binder jetting. However, a trade-off between load-bearing capacity during casting and removability from the casting leads to design limitations. Slurry-based binder jetting allows the processing of fine powders and the economical production of sinterable ceramic cores. Its performance, potential and challenges are presented in the context of the foundry process chain. As drying affects material properties and process efficiency, detailed investigations are carried out to control the properties via drying. Average roughness depths of 1.2 µm and flexural strengths of 25 MPa were achieved using aqueous quartz slurry and appropriate process parameters. By incorporating predetermined fracture lines into the internal geometry of hollow casting core structures, the stress generated during the solidification of the cast metal induces decoring. A promising process chain for producing efficient, close-contour coolings in high-performance castings is presented. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |