Figure 6
From: Linking Rheology and Printability for Dense and Strong Ceramics by Direct Ink Writing
5 mm stacks of 43 wt% and 45 wt% boehmite suspensions printed with 250, 500 and 840 μm nozzles at 3 mm.s −1 after different aging times. 45 wt% suspension became printable earlier than 43 wt%, whatever than nozzle size is. Nozzle size also impacts the printability as comparable aging times lead to different results with the same suspension. With a \({\sigma }_{y}^{Dyn}\) of 200 Pa, 5 h-45 wt% object clearly confirms that yield stress is not a sufficient criterion.
