Additive manufacturing of SiC-Sialon refractory with complex geometries was achieved using direct ink writing processes, followed by pressure less sintering under nitrogen. The effects of particle size of SiC powders, solid content of slurries and additives on the rheology, thixotropy and viscoelasticity of ceramic slurries were investigated. The optimal slurry with a high solid content was composed of 81 wt% SiC (3.5 µm+0.65 µm), Al2O3 and SiO2 powders, 0.2 wt% dispersant, and 2.8 wt% binder. Furthermore, the accuracy of the structure of specimens was improved via adjustment of the printing parameters, including nozzle size, extrusion pressure, and layer height. The density and flexural strength of the printed SiC-Sialon refractory sintered at 1600 °C were 2.43 g/cm3 and 85 MPa, respectively. In addition, the printed SiC-Sialon crucible demonstrated excellent corrosion resistance to iron slag. Compared to the printed crucible bottom, the crucible side wall was minimally affected by molten slag.
R. Chen et al., "Additive Manufacturing Of SiC-Sialon Refractory With Excellent Properties By Direct Ink Writing," Journal of the European Ceramic Society, Elsevier, Jan 2023.
The definitive version is available at https://doi.org/10.1016/j.jeurceramsoc.2023.07.055
Materials Science and Engineering
Keywords and Phrases
3D printing; Complex-shape; Printing parameters; Rheology; SiC-Sialon refractory
International Standard Serial Number (ISSN)
Article - Journal
© 2023 Elsevier, All rights reserved.
01 Jan 2023