航空材料学报2026，Vol.46Issue(1)：121-129,9.DOI:10.11868/j.issn.1005-5053.2025.000149
光固化增材制造碳化硅陶瓷的宏观缺陷检测及分析
Investigation of macroscopic defects of silicon carbide ceramics by stereolithography additive manufacturing
摘要
Abstract
The additive manufacturing process offers a solution for fabricating complex hollow structures that are challenging to realize through traditional ceramic preparation methods.However,defects are often inevitable during the additive manufacturing process.In this study,silicon carbide ceramics with complex hollow structures are prepared using the stereolithography(SLA)additive manufacturing process.Industrial computed tomography(CT)non-destructive testing techniques are employed to observe and analyze macroscopic defects,such as cracks.The initiation and propagation mechanisms of cracks are investigated,and the influence of structural features on crack propagation is explored.The results indicate that printing corners and holes in the component are weak regions prone to stress concentration,which can lead to crack formation or further cracking.Therefore,particular attention should be paid to the printing process and the removal of residual powder.Through process optimization such as structure optimization and printing speed,especially the optimization of speed gradient in weak areas,it is helpful to avoid the occurrence of defects such as cracks.关键词
光固化增材制造/碳化硅陶瓷/打印缺陷/有限元分析Key words
stereolithography additive manufacturing/silicon carbide ceramic/crack defect/finite element method分类
航空航天引用本文复制引用
杨晓,申笑天,杨勇,佘玉龙,刘学建,黄政仁..光固化增材制造碳化硅陶瓷的宏观缺陷检测及分析[J].航空材料学报,2026,46(1):121-129,9.基金项目
国家重点研发计划项目(2021YFB3701500) （2021YFB3701500）
