TY - JOUR
T1 - Alumina-based ceramic cores with high porosity and flexural strength fabricated via DLP 3D-printing
AU - She, Wentan
AU - Liu, Yansong
AU - Liu, Yongsheng
AU - Cao, Yejie
AU - Sun, Xiaokun
AU - Du, Yanxia
N1 - Publisher Copyright:
© 2025 Elsevier Ltd and Techna Group S.r.l.
PY - 2025
Y1 - 2025
N2 - Alumina-based ceramics are regarded as the ideal material for ceramic cores owing to their outstanding high-temperature properties. In this work, digital light processing (DLP) was adopted to form complex alumina-based core structures with polymethyl methacrylate (PMMA) microspheres as pore-forming agent. The influence of PMMA content and sintering temperature on the physical properties, flexural strength, and microstructure of alumina-based ceramics was investigated. The results showed that with the increase of PMMA content and decrease of sintering temperature, the porosity of ceramic cores gradually increased, whereas the flexural strength decreased. The flexural strength of ceramics was enhanced by the synergistic effect of SiO2 and TiO2 sintering aids, and PMMA microspheres also effectively formed a large number of pores. The most optimal structural characteristics (porosity of 50.48 % and flexural strength of 46.77 MPa) were achieved, via sintering of alumina-based ceramics at 1200 °C with the addition of 20 vol% PMMA microspheres.
AB - Alumina-based ceramics are regarded as the ideal material for ceramic cores owing to their outstanding high-temperature properties. In this work, digital light processing (DLP) was adopted to form complex alumina-based core structures with polymethyl methacrylate (PMMA) microspheres as pore-forming agent. The influence of PMMA content and sintering temperature on the physical properties, flexural strength, and microstructure of alumina-based ceramics was investigated. The results showed that with the increase of PMMA content and decrease of sintering temperature, the porosity of ceramic cores gradually increased, whereas the flexural strength decreased. The flexural strength of ceramics was enhanced by the synergistic effect of SiO2 and TiO2 sintering aids, and PMMA microspheres also effectively formed a large number of pores. The most optimal structural characteristics (porosity of 50.48 % and flexural strength of 46.77 MPa) were achieved, via sintering of alumina-based ceramics at 1200 °C with the addition of 20 vol% PMMA microspheres.
KW - Alumina-based ceramic cores
KW - Digital light processing
KW - Flexural strength
KW - Porosity
UR - http://www.scopus.com/inward/record.url?scp=105003657310&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2025.04.250
DO - 10.1016/j.ceramint.2025.04.250
M3 - 文章
AN - SCOPUS:105003657310
SN - 0272-8842
JO - Ceramics International
JF - Ceramics International
ER -
