@article{XU2022, 
author = {Xiqing XU and Jiaxian FAN and Shuxin NIU and Xin LI and Qiang ZHANG and Jie LI},
title = {Anisotropy Control and High-Temperature Strengthening of Silica Ceramic Cores Fabricated by 3D Printing},
year = {2022},
journal = {Journal of the Chinese Ceramic Society},
volume = {50},
number = {9},
pages = {2422-2429},
keywords = {silica ceramic cores, 3D printing, mullite, anisotropy, high-temperature strength},
url = {https://www.sciopen.com/article/10.14062/j.issn.0454-5648.20210977},
doi = {10.14062/j.issn.0454-5648.20210977},
abstract = {Investigation on 3D printing of silica ceramic cores is crucial to the development of aviation level in China, but the related problems are high-temperature softening and structural anisotropy. Silica ceramic cores were fabricated by DLP light curing 3D printing technology using fused silica powder as a raw material and mullite powder as a modifier. The results show that the ceramic cores have a layer-packed anisotropic structure. The addition of a small amount of mullite powder promotes the sintering densification of ceramic powder and diffusion binding between printing layers. As a result, the structural anisotropy of ceramic cores is relieved, and the flexural strength is enhanced and tended to isotropy. For ceramic cores with 3% mullite powder, the high-temperature flexural strengths in horizontal and vertical printing are up to 18.5 MPa and 16.3 MPa, respectively, which can satisfy the demands for hollow blade casting.}
}