DOI number:10.1111/jace.70386
Journal:Journal of the American Ceramic Society
Abstract:Heterostructured materials hold great potential for achieving superior mechanical properties. However, the majority of current studies on heterostructured ceramics have predominantly focused on layered systems. Here, we report a new 3YSZ-(ZrO2-SiO2) dual-heterostructured ceramic composites (DHCCs) comprising 3 mol% yttria-stabilized zirconia (3YSZ) domains and ZrO2-SiO2 domains. The DHCCs exhibited a dual-level hierarchical structure. Specifically, the 3YSZ domain consisted of submicron ZrO2 grains, while the ZrO2-SiO2 domain was composed of ZrO2 nanograins dispersed within an amorphous SiO2 matrix. To fabricate the DHCCs, hybrid powders were first synthesized by a chemical co-precipitation method, followed by sintering to produce dense DHCCs. The phase composition, microstructure, and mechanical properties of the DHCCs were characterized. Compared with the homogeneously structured ZrO2-SiO2 ceramic, the DHCCs exhibited an 85.6% increase in strength and a 47.2% improvement in fracture toughness. Finally, the underlying strengthening and toughening mechanisms of the DHCCs were elucidated. These findings demonstrate that architecting dual-heterogeneous structures represents an effective strategy for achieving robust mechanical properties.
Co-author:Wenjun Yu, Bohan Wang, Zihua Lei, Mingxi Deng, Guanghua Liu
First Author:Le Fu*
Correspondence Author:Gemei Cai*
Volume:109
Page Number:e70386
Translation or Not:no
Links to published journals:https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.70386