@article{Sun2024, 
author = {Jian Sun and Jingde Zhang and Xu Zhang and Zihe Li and Jianzhang Li and Sijie Wei and Weibin Zhang and Weili Wang and Guifang Han},
title = {High strength mullite-bond SiC porous ceramics fabricated by digital light processing},
year = {2024},
journal = {Journal of Advanced Ceramics},
volume = {13},
number = {1},
pages = {53-62},
keywords = {digital light processing (DLP), SiC ceramics, pre-oxidation, mullite-bond SiC, mechanical properties},
url = {https://www.sciopen.com/article/10.26599/JAC.2024.9220835},
doi = {10.26599/JAC.2024.9220835},
abstract = {Fabricating SiC ceramics via the digital light processing (DLP) technology is of great challenge due to strong light absorption and high refractive index of deep-colored SiC powders, which highly differ from those of resin, and thus significantly affect the curing performance of the photosensitive SiC slurry. In this paper, a thin silicon oxide (SiO2) layer was in-situ formed on the surface of SiC powders by pre-oxidation treatment. This method was proven to effectively improve the curing ability of SiC slurry. The SiC photosensitive slurry was fabricated with solid content of 55 vol% and viscosity of 7.77 Pa·s (shear rate of 30 s−1). The curing thickness was 50 μm with exposure time of only 5 s. Then, a well-designed sintering additive was added to completely convert low-strength SiO2 into mullite reinforcement during sintering. Complex-shaped mullite-bond SiC ceramics were successfully fabricated. The flexural strength of SiC ceramics sintered at 1550 ℃ in air reached 97.6 MPa with porosity of 39.2 vol%, as high as those prepared by spark plasma sintering (SPS) techniques.}
}