A novel architectural design is introduced which utilizes the layer-by-layer capabilities of the vat photopolymerization 3D printing process to fabricate multi-material ceramic components with improved thermal shock resistance. The combination of 3D-printed alumina-zirconia (ZTA) with alumina (A) layers generates compressive residual stresses in the embedded alumina regions during cooling down from sintering. Thermal shock tests in water are performed on samples at different maximum temperatures and the strength degradation of the multi-material design is investigated and compared to the reference monoliths. Experimental results show that the retained strength of the multi-material ceramic after thermal shock is twice as high as that of the monoliths, associated with the crack arrest capability of the embedded layers. The concept is demonstrated on 3D-printed multi-ceramic blades for potential high temperature applications, showing enhanced “damage-tolerance” against thermal shock cracks. These findings open the path for fabricating reliable ceramic components using the vat photopolymerization process.
|Seiten (von - bis)
|Journal of the European Ceramic Society
|7 Nov. 2023
|Elektronische Veröffentlichung vor Drucklegung. - 7 Nov. 2023
Bibliographische NotizFunding Information:
Funding for this research was provided by the European Research Council (ERC) excellent science grant “ CERATEXT ” through the Horizon 2020 program under contract 817615 . The authors gratefully acknowledge A.-K. Hofer (Department of Materials Science, Montanuniversität Leoben) for 3D-printing the monolithic reference samples, I. Kraleva (Department of Materials Science, Montanuniversität Leoben) for the support in sample cross-sectioning and microscopy analysis and L. Bastos Mateus (Department of Materials Science, Montanuniversität Leoben) for assistance in performing the thermal shock tests.
© 2023 The Authors