Mechanical properties of biomimetic ceramic with Bouligand architecture

作者：Yumin An, Yi Yang, Yongna Jia, Wenbo Han, Yehong Cheng · 发表于：Journal of the American Ceramic Society · 年份：2021 · DOI：10.1111/jace.18262 · 被引用次数：23 · 研究领域：Bone Tissue Engineering Materials、Advanced ceramic materials synthesis、MXene and MAX Phase Materials

Abstract Biomimetic Bouligand architecture is constructed in the ceramic to improve its toughness. Firstly, unidirectional carbon fiber‐reinforced ZrB 2 ‐SiC ceramic films are achieved through a vacuum‐assisted filtration method using graphene oxide. Then, ceramic films are helically assembled at a fixed angle of 30° in the graphite die based on the fiber orientation. Finally, the spark plasma sintering method was utilized to densify helical assembly carbon fiber/ceramic films. By constructing Bouligand structure, high fracture toughness (7.4 MPa·m 0.5 ) and work of fracture (∼1055 J/m 2 ) are achieved in ZrB 2 ‐based ceramic. The toughening mechanisms mainly are crack deflection, twisting and branching, carbon fiber pulling out, and bridging.