Theoretical model based on stress waves and experimental verification of residual stress in stereolithography printed ZrO2 porous ceramics. Issue 16 (15th August 2022)

• Record Type: Journal Article
• Authors: Zhao, Li; Jiang, Zhaoliang; Ma, Songhua; Zhang, Cheng; Guo, Weiwei
• Is Part Of: Ceramics international. Volume 48:Issue 16(2022)
• Page Start: 23983
• Page End: 23988
• Publication Date: 2022-08-15
• Subjects: SLA–3D printing -- Residual stress -- Theoretical model -- Stress waves -- Porous structure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.05.073
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In rapidly advancing field of porous ceramics, stereolithography (SLA) is important method for 3D printing of zirconia (ZrO2 ) ceramic suspensions for medical implants. However, during SLA–3D printing of porous ceramics, shrinkage and stress waves lead to residual stress. In this work, theoretical model of residual stress in SLA–3D-printed ZrO2 ceramic porous-structure parts is established based on stress waves. It is found that variation trend of residual stress with pore size is consistent with that of stress concentration factor. Porous samples of zirconia ceramics with two types of holes (square and circular holes) are printed via SLA–3D printing. Surface residual stress of printed parts is measured to verify the correctness of theoretical model. Theoretical model proposed in this study provides theoretical guidance for SLA–3D printing of ceramic porous structures.