| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of High and Ultra-high Temperature Ceramics and Composites: Processing, Characterization and Testing
|
| Presentation Title |
Anisotropic Shrinkage of Additively Manufactured Ceramics Via Stereolithography |
| Author(s) |
Kevin T. Strong, Brian Lester, Dale Cillessen |
| On-Site Speaker (Planned) |
Brian Lester |
| Abstract Scope |
The lithography ceramic manufacturing (LCM) approach for additive manufactured ceramics builds 3D structures by UV curing the ceramic ink layer-by-layer. As a result, the ceramics anisotropically shrink during sintering with the Z plane shrinking up to 10% more than the XY plane. In addition, print parameters such as print layer thickness can alter the Z:XY plane shrinkage ratio. Predictive tools accounting for this anisotropy are necessary to ensure accurate part dimensions after the sintering process. A modified Skorohold-Olevsky Viscous Sintering (SOVS) model was used to developed for anisotropic shrinkage. In addition, the master-sintering curve (MSC) approach was explored for its applicability to LCM ceramics. Several different ceramic materials (94% alumina, zirconia, and zirconia toughened alumina) were printed, and shrinkage measurements were made in the Z and XY orientation. These results were compared to predictions to assess model performance.SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |