<p>Enhanced 3D printed Al2O3 core via in-situ mullite</p>

doi:10.1016/j.addma.2022.102826

IMR OpenIR

	Enhanced 3D printed Al2O3 core via in-situ mullite
	Li, Qiaolei 1,2; Meng, Xiantian 3; Zhang, Xuechun 1,2; Liang, Jingjing 2,4; Zhang, Chaowei 2; Li, Jinguo 2,4; Zhou, Yizhou 2; Sun, Xiaofeng 2
通讯作者	Liang, Jingjing(jjliang@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
	2022-07-01
发表期刊	ADDITIVE MANUFACTURING
ISSN	2214-8604
卷号	55 页码:14
摘要	The 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.
关键词	3D printing Alumina Fused silica Mullite Ceramic cores
资助者	National Science and Technology Major Project ; National Key Research and Development Program of China ; Fundamental Research Funds for Central Univer-sities
DOI	10.1016/j.addma.2022.102826
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Engineering ; Materials Science
WOS类目	Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS记录号	WOS:000798171800003
出版者	ELSEVIER
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174159
专题	中国科学院金属研究所
通讯作者	Liang, Jingjing; Li, Jinguo
作者单位	1.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
推荐引用方式 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.