Architecting dual heterogeneous structures to achieve robust mechanical properties in ZrO2-SiO2 nanocrystalline ceramics
发布时间：2025-11-24
点击次数：
DOI码：10.1111/jace.70386
发表刊物：Journal of the American Ceramic Society
摘要：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.
合写作者：Wenjun Yu, Bohan Wang, Zihua Lei, Mingxi Deng, Guanghua Liu
第一作者：Le Fu*
通讯作者：Gemei Cai*
卷号：109
页面范围：e70386
是否译文：否
发表时间：2025-11-24
发布期刊链接：https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.70386