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Enhanced 3D printed Al2O3 core via in-situ mullite

Li, Qiaolei1,2; Meng, Xiantian3; Zhang, Xuechun1,2; Liang, Jingjing2,4; Zhang, Chaowei2; Li, Jinguo2,4; Zhou, Yizhou2; Sun, Xiaofeng2
Corresponding AuthorLiang, Jingjing(jjliang@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
2022-07-01
Source PublicationADDITIVE MANUFACTURING
ISSN2214-8604
Volume55Pages:14
AbstractThe ceramic core plays an important role in the preparation of aero-engine hollow blades, as it can directly determine the precision and pass rate of the cooling passage in the blade cavity. Sufficient high-temperature bending strength, high open porosity, and low sintering shrinkage are the main requirements for qualified ceramic cores. In order to prepare qualified ceramic cores with complex structures, in-situ mullite-reinforced Al2O3-based ceramic cores were successfully prepared using vat photopolymerization 3D printing technology. The in-situ synthesis of mullite was designed through thermodynamic analysis. The influence mechanisms of the sintering temperature and doping amount of fused silica on the open porosity, sintering shrinkage, and bending strength of the core were systematically investigated. With an increase in the sintering temperature and doping amount of fused silica, the porosity of the in situ mullite-reinforced ceramic core decreased. Sintering shrinkage increased with an increase in the sintering temperature and doping amount of fused silica. The cores containing 20 wt% fused silica showed the smallest sintering shrinkage. The bending strength increased with an increase in the sintering temperature and the doping amount of fused silica. A core doped with 20 wt% fused silica had the highest bending strength at 1773.15 K. Furthermore, 20 wt% fused silica doping, sintered at 1673.15 K, can be used to prepare in-situ mullite enhanced Al2O3-based cores with the best comprehensive properties. This core has a higher open porosity (40%), suitable bending strength of 25 MPa (at 1773.15 K), and lower sintering shrinkage in the Z direction. The significance of this study lies in the regulation of in-situ mullite generation and viscous flow in solid-liquid sintering by adjusting the doping amount of fused silica and the sintering process, and this opens up new pathways by the coordinated regulation of strength, open porosity, and sintering shrinkage of 3D printed ceramic cores.
Keyword3D printing Alumina Fused silica Mullite Ceramic cores
Funding OrganizationNational Science and Technology Major Project ; National Key Research and Development Program of China ; Fundamental Research Funds for Central Univer-sities
DOI10.1016/j.addma.2022.102826
Indexed BySCI
Language英语
Funding ProjectNational Science and Technology Major Project[2017-VI-0002-0072] ; National Science and Technology Major Project[Y2019-VII-0011-0151] ; National Key Research and Development Program of China[2018YFB1106600] ; Fundamental Research Funds for Central Univer-sities[WK5290000002]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Manufacturing ; Materials Science, Multidisciplinary
WOS IDWOS:000798171800003
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174159
Collection中国科学院金属研究所
Corresponding AuthorLiang, Jingjing; Li, Jinguo
Affiliation1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
3.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
4.Space Mfg Technol, CAS Key Lab, Beijing 100094, Peoples R China
Recommended Citation
GB/T 7714
Li, Qiaolei,Meng, Xiantian,Zhang, Xuechun,et al.

Enhanced 3D printed Al2O3 core via in-situ mullite

[J]. ADDITIVE MANUFACTURING,2022,55:14.
APA Li, Qiaolei.,Meng, Xiantian.,Zhang, Xuechun.,Liang, Jingjing.,Zhang, Chaowei.,...&Sun, Xiaofeng.(2022).

Enhanced 3D printed Al2O3 core via in-situ mullite

.ADDITIVE MANUFACTURING,55,14.
MLA Li, Qiaolei,et al."

Enhanced 3D printed Al2O3 core via in-situ mullite

".ADDITIVE MANUFACTURING 55(2022):14.
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