@article{ZHENG2021, 
author = {Wen ZHENG and Jia-Min WU and Shuang CHEN and Chang-Shun WANG and Chun-Lei LIU and Shuai-Bin HUA and Kang-Bo YU and Jie ZHANG and Jing-Xian ZHANG and Yu-Sheng SHI},
title = {Influence of Al2O3 content on mechanical properties of silica-based ceramic cores prepared by stereolithography},
year = {2021},
journal = {Journal of Advanced Ceramics},
volume = {10},
number = {6},
pages = {1381-1388},
keywords = {silica, ceramic core, stereolithography, Al2O3, mechanical properties, hollow blades},
url = {https://www.sciopen.com/article/10.1007/s40145-021-0513-y},
doi = {10.1007/s40145-021-0513-y},
abstract = {Silica ceramic cores have played an important part in the manufacture of hollow blades due to their excellent chemical stability and moderate high-temperature mechanical properties. In this study, silica-based ceramics were prepared with Al2O3 addition by stereolithography, and the influence of Al2O3 content on mechanical properties of the silica-based ceramics was investigated. The Al2O3 in silica-based ceramics can improve the mechanical properties by playing a role as a seed for the crystallization of fused silica into cristobalite. As a result, with the increase of Al2O3 content, the linear shrinkage of the silica-based ceramics first decreased and then increased, while the room-temperature flexural strength and the high-temperature flexural strength first increased and then decreased. As the Al2O3 content increased to 1.0 vol%, the linear shrinkage was reduced to 1.64% because of the blocked viscous flow caused by Al2O3. Meanwhile, the room-temperature flexural strength and the high-temperature flexural strength were improved to 20.38 and 21.43 MPa with 1.0 vol% Al2O3, respectively, due to the increased α-cristobalite and β-cristobalite content. Therefore, using the optimal content of Al2O3 in silica-based ceramics can provide excellent mechanical properties, which are suitable for the application of ceramic cores in the manufacturing of hollow blades.}
}