Strong hybrid cellular/lamellar ceramic/polymer composites via emulsification freeze casting

IF 3.5 3区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Guanjin Li, Yushu Li, Likai Yang, Lingyi Hong, Xinyu Dong, Vincent Beng Chye Tan, Wei Zhai
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引用次数: 0

Abstract

Despite their unremarkable constituents, natural materials, with their hybrid hierarchical structure, possess exceptional mechanical properties. The hybrid hierarchical structure typically comprises two or more distinct phases such as lamellar, gradient, tubular, and cellular form. An oil-in-water emulsion freeze casting method is devised to create composite materials with a bio-inspired hybrid cellular/lamellar structure. The impact of two types of binders on the microstructure, namely, polyvinyl alcohol and F127, and their correlation with the mechanical properties of the composites were investigated. Samples fabricated with a 5 wt.% F127 emulsification slurry exhibited an “H”-shaped cellular/lamellar structure and achieved compressive strength and specific energy absorption of about 360 MPa and 37 kJ/kg, which are noteworthy considering their ceramic and epoxy composition. Finite element analyses were then conducted to reveal how mechanical load distribution between the different phases of the composites and the influence of microstructure on fracture paths can lead to enhancement in mechanical properties.

通过乳化冷冻铸造制备强杂化细胞/层状陶瓷/聚合物复合材料
尽管它们的成分不起眼,但天然材料具有混合层次结构,具有优异的机械性能。混合层次结构通常包括两个或多个不同的相,如片层状、梯度状、管状和细胞状。设计了一种水包油乳液冷冻铸造方法,用于制造具有仿生混合细胞/层状结构的复合材料。研究了聚乙烯醇和F127两种粘结剂对复合材料微观结构的影响,以及它们与复合材料力学性能的相关性。以5 wt.%的F127乳化浆液制备的样品呈现出“H”形的细胞/层状结构,抗压强度和比能吸收分别约为360 MPa和37 kJ/kg,考虑到其陶瓷和环氧树脂成分,这是值得注意的。然后进行有限元分析,揭示复合材料不同相之间的力学载荷分布以及微观结构对断裂路径的影响如何导致力学性能的增强。
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来源期刊
Journal of the American Ceramic Society
Journal of the American Ceramic Society 工程技术-材料科学:硅酸盐
CiteScore
7.50
自引率
7.70%
发文量
590
审稿时长
2.1 months
期刊介绍: The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.
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