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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Preliminary studies on additive manufacturing of over 95% dense 3Y zirconia parts via digital imaging projection

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do Amaral, Leticia Bueno [1] ; Faneco Paschoa, Jorge Luis [1] ; Magalhaes, Daniel Varela [1] ; Foschini, Cesar Renato [2] ; Suchicital, Carlos T. A. [3] ; Fortulan, Carlos Alberto [1]
Total Authors: 6
[1] Univ Sao Paulo, Dept Mech Engn, Ave Trabalhador Sao Carlense 400 Ctr, BR-13560970 Sao Carlos, SP - Brazil
[2] Sao Paulo State Univ Unesp, Dept Mech Engn, Ave Engenheiro Luiz Edmundo C Coube 14-01, BR-17033360 Baurubauru, SP - Brazil
[3] Virginia Tech, Mat Sci & Engn, 119A Surge Bldg, 400 Stanger St, Blacksburg, VA 24061 - USA
Total Affiliations: 3
Document type: Journal article
Source: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 42, n. 1 JAN 2 2020.
Web of Science Citations: 1

Additive manufacturing of ceramic materials has been evolving greatly. Yet, in the last 5 years, techniques based on lithography began to emerge with an emphasis on obtaining dense parts. The present work deals with the experimental study of additive manufacturing of 3Y zirconia via digital imaging projection. For this purpose, a commercial light projection system was set up with a mechanical spreader (blade) of paste layers on an x-y-z built platform. Formulations developed for a ceramic powder loaded with a photo-polymerizable resin and solvents were printed. After printing, the specimens were fired for solvents and resin removal, sintered and characterized. Digital projection (without filter) provided UV and visible light enough to polymerize the resin in layers of up to 50 mu m thickness. Low-porosity zirconia bodies (3.4%) were obtained using mixtures with ceramic powder/resin concentration up to 50 vol%. Solvent removal under air pressure (3 bar) in an autoclave at 50 degrees C resulted in low lamination effects and avoided bubbles evolution. Three-point flexural test in non-machined sintered bars reached an average stress of 337 MPa. The results are very promising and demonstrate that the additive manufacturing of ceramic parts based on a digital imaging projection process is a viable alternative. (AU)

FAPESP's process: 16/23910-0 - Nanostructured ceramic film manufacturing for gas sensors application
Grantee:Cesar Renato Foschini
Support type: Regular Research Grants