Improved mechanical quality of ceramic vat photopolymerization prints by supercritical carbon dioxide extraction

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS Open Ceramics Pub Date : 2025-02-15 DOI:10.1016/j.oceram.2025.100753

Nonna Nurmi , Erkka J. Frankberg , Arnold Ismailov , Dominique Hautcoeur , Setareh Zakeri , Essi Sarlin , Erkki Levänen

{"title":"Improved mechanical quality of ceramic vat photopolymerization prints by supercritical carbon dioxide extraction","authors":"Nonna Nurmi , Erkka J. Frankberg , Arnold Ismailov , Dominique Hautcoeur , Setareh Zakeri , Essi Sarlin , Erkki Levänen","doi":"10.1016/j.oceram.2025.100753","DOIUrl":null,"url":null,"abstract":"<div><div>Vat photopolymerization (VPP) enables 3D printing of dense ceramics with complex structures, however the mandatory thermal pre-conditioning and debinding steps to remove the organic substances, can last 7 days. Supercritical carbon dioxide (scCO<sub>2</sub>) extraction was used as a pre-conditioning method to investigate if dense and sufficiently strong alumina parts can be obtained using a shorter thermal debinding cycle, due to the creation of nanosized porosity during the scCO<sub>2</sub> extraction. The mechanical properties and microstructure of the sintered alumina parts with 15 h scCO<sub>2</sub> extraction + 18 h thermal debinding were comparable to the reference with 101 h debinding, which marks a significant 67 % reduction in time. Furthermore, scCO<sub>2</sub> extraction improved the flexural strength and density, and resulted in less deviation. Thus, scCO<sub>2</sub> extraction can shorten post-processing of ceramic VPP prints and facilitate more predictable properties, which have been the two bottlenecks related to the VPP process.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100753"},"PeriodicalIF":2.9000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Open Ceramics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666539525000203","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Vat photopolymerization (VPP) enables 3D printing of dense ceramics with complex structures, however the mandatory thermal pre-conditioning and debinding steps to remove the organic substances, can last 7 days. Supercritical carbon dioxide (scCO₂) extraction was used as a pre-conditioning method to investigate if dense and sufficiently strong alumina parts can be obtained using a shorter thermal debinding cycle, due to the creation of nanosized porosity during the scCO₂ extraction. The mechanical properties and microstructure of the sintered alumina parts with 15 h scCO₂ extraction + 18 h thermal debinding were comparable to the reference with 101 h debinding, which marks a significant 67 % reduction in time. Furthermore, scCO₂ extraction improved the flexural strength and density, and resulted in less deviation. Thus, scCO₂ extraction can shorten post-processing of ceramic VPP prints and facilitate more predictable properties, which have been the two bottlenecks related to the VPP process.

Abstract Image