Mechanical properties of biomimetic ceramic with Bouligand architecture |
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| Authors: | Yumin An Yi Yang Yongna Jia Wenbo Han Yehong Cheng |
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| Affiliation: | 1. School of Mechanical Engineering, Hebei University of Technology, Tianjin, P. R. China;2. School of Artificial Intelligence, Hebei University of Technology, Tianjin, P. R. China;3. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, P. R. China |
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| Abstract: | Biomimetic Bouligand architecture is constructed in the ceramic to improve its toughness. Firstly, unidirectional carbon fiber-reinforced ZrB2-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·m0.5) and work of fracture (～1055 J/m2) are achieved in ZrB2-based ceramic. The toughening mechanisms mainly are crack deflection, twisting and branching, carbon fiber pulling out, and bridging. |
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| Keywords: | biomimetic ceramic Bouligand architecture toughening mechanisms |
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