Compression fatigue properties and damage mechanisms of a bioinspired nacre-like ceramic-polymer composite

SCRIPTA MATERIALIA

卷:203

Article

Tan, Guoqi^1,2  Yu, Qin³  Liu, Zengqian^1,2  Wang, Xuegang¹  Zhang, Mingyang^1,2  Liu, Yanyan^1,2  Zhang, Zhefeng^1,2  Ritchie, Robert O.³ 

[1] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China

[3] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

关键词: Nacre-like composites;    Fatigue properties;    Damage mechanisms;    Stress amplitude;    Dental materials;   

DOI  :  10.1016/j.scriptamat.2021.114089

来源: Elsevier

【 摘 要 】

Fatigue resistance is invariably critical for structural materials, but is rarely considered in the development of new bioinspired materials. Here the fatigue behavior and damage mechanisms of a nacre-like ceramic (yttria-stabilized zirconia) polymer (polymethyl methacrylate) composite, which resembles human tooth enamel in its stiffness and hardness, were investigated under cyclic compression to simulate potential service conditions. The composite has a brick-and-mortar structure which exhibits a staircase like fracture behavior; it displays a transition in cracking mode from the fracture of the ceramic bricks to separation along the inter-brick polymer phase with increasing stress amplitude. The nacre-like structure functions to induce crack deflection, increase the roughness of the crack surfaces, and promote the mutual sliding between bricks during fracture; this results in high fatigue resistance, which enhances the potential of this composite for dental applications. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free