| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Towards Direct Additive Manufacturing of Ceramics by Selective Laser Flash Sintering |
| Author(s) |
Desiderio Kovar |
| On-Site Speaker (Planned) |
Desiderio Kovar |
| Abstract Scope |
Powder bed additive manufacturing (AM) utilizes a localized heat source such as a laser to selectively scan over regions of the bed that are to be sintered or melted. Direct powder bed AM does not require a polymer binder and is routine with metals but has proven more difficult to implement with ceramics because of their high homologous temperatures, slow sintering kinetics, and their susceptibility to thermal shock. The application of a large electric field while heating enables a phenomenon known as flash sintering at much higher rates and lower temperatures compared to conventional sintering. We have demonstrated that is possible to combine flash sintering with a scanning laser to locally selectively laser flash sinter (SLFS) a patterned layer of material. We suggest that it may be possible to utilize this approach to print directly AM 3D parts. Our experiences with YSZ, AlN, and LaCrO3 will be discussed. |