Issue 11, 2022

Rationally-designed self-shaped ceramics through heterogeneous green body compositions

Abstract

Forming ceramics into rationally-designed and complex shapes without compromising their mechanical properties is a major challenge. Here, we demonstrate self-shaping of ceramics through sequential stereolithographic printing of ceramic resins into components with a heterogeneous concentration of ceramic particles, resulting in well-defined anisotropic shrinkage and, consequently, shape changes during sintering. The method is versatile and scalable and results in well-controlled shape changes in ceramics through bending, folding, twisting, and combinations of these mechanisms. The density measurements and mechanical tests show that the stresses resulting from the self-shaping mechanisms do not significantly affect the physical and mechanical properties of the ceramics. Together with the experiments, we developed a material- and scale-independent mechanical model based on linear elasticity that predicted shape changes accurately. The model can serve as a design tool to guide the selection of particle concentrations to realize the desired shapes in a broad range of ceramics.

Graphical abstract: Rationally-designed self-shaped ceramics through heterogeneous green body compositions

Supplementary files

Article information

Article type
Communication
Submitted
23 Jūn. 2022
Accepted
10 Aug. 2022
First published
12 Aug. 2022

Mater. Horiz., 2022,9, 2762-2772

Rationally-designed self-shaped ceramics through heterogeneous green body compositions

Z. Ding, H. Zreiqat and M. Mirkhalaf, Mater. Horiz., 2022, 9, 2762 DOI: 10.1039/D2MH00785A

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