Crack initiation and propagation in a high-solid-loading ceramic core fabricated through stereolithography 3D printing
Xiaolong An,
Jiawang Chen,
Yahang Mu,
Jingjing Liang,
Jinguo Li,
Yizhou Zhou,
Xiaofeng Sun
Affiliations
Xiaolong An
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China; Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; Semiconductor Manufacturing International Corporation, Shanghai 201203, China; Corresponding author. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China.
Jiawang Chen
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China; Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Yahang Mu
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China; Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Jingjing Liang
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China; Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; Space Manufacturing Technology (CAS Key Lab), Beijing 100094, China; Corresponding author. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China.
Jinguo Li
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China; Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; Space Manufacturing Technology (CAS Key Lab), Beijing 100094, China; Corresponding author. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China.
Yizhou Zhou
Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Xiaofeng Sun
Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Ceramic cores are applied in electronics, aerospace, medicine, military, automotive, and other fields. However, the effects of the build direction, along with the shrinkage of the green body and thermal stress, on the mechanical properties of 3D ceramic cores have not been elucidated. To reveal the optimum conditions for crack resistance in a high-solid-loading ceramic core, a silicon-based ceramic core with a solid content of 60 vol% was fabricated through stereolithography 3D printing and analyzed in terms of its microstructure-level crack initiation and propagation. The green bodies were initially 3D printed in different build directions (length-directed, width-directed, and height-directed) and then sintered at different temperatures (1100 °C-1250 °C). Higher sintering temperatures generally produced more cracks, and the synergistic effects of the sintering temperature and build direction induced crack initiation and propagation. The width-directed sample sintered at 1200 °C, in particular, exhibited effectively controlled crack growth without sacrificing strength.
