Towards Functional Parts by Binder Jetting Calcium-Sulphate with Thermal Treatment Post-Processing

Abstract

The objective of our research is to improve the properties of calcium-sulphate hemihydrate parts printed by binder jetting. In this paper, we show the thermal treatment results when using temperature time ramps on binder-jetted ceramic parts without infiltrating. The results show that the mechanical properties of printed parts are improved substantially. Two different thermal cycles were investigated for their effect on the dehydration process of CaSO4·½H2O using infrared analysis. The thermal-treated samples were compared with respect to porosity, surface roughness, compression strength and dimensional and weight variation. The proposed thermal treatment significantly improves the compression strength in a short time, guaranteeing dimensional stability while providing a good surface. This improvement in mechanical properties offers a great chance for using binder-jetted parts as functional components, for example, in the casting field or the medical sector (scaffolds).

Translating Imaging Into 3D Printed Cardiovascular Phantoms

“…In contrary to PolyJet, the inkjet head does not deposit the printing material but a binder that hardens the printing material by displacement on a powder bed. 75 , 76 This allows the production of rigid models meeting the requirements for use in orthopedic surgery, 77 although they are less suitable for cardiovascular 3DPSPs. Furthermore, binder jetting can produce only single-material models and requires extensive postprocessing.…”