Abstract
High strength and high toughness are mutually exclusive in structural materials. In ceramic materials, increasing toughness usually depends on the introduction of a ductile phase that reduces the strength and high-temperature stability of the material. In this work, vat photopolymerization 3D printing technology was used to achieve toughening of ceramic composite material. The friction sliding of the 3D-printed ceramic macrolayer structure results in effective energy dissipation and redistribution of strain in the whole structure, and macroscale toughening of the ceramic material is realized. In addition, the bridging and elongation of the crack in situ amorphous ceramic whiskers were significant microscopic toughening results, coupled with the toughening of the crack tip of nano-ZrO2. Multiscale collaborative toughening methods based on 3D-printed ceramics should find wide applications for materials in service at extreme high temperatures.
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