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Flexural Stress Homogenization Effects of Interfacial Transition Layers in Modified ZrB2-Al2O3/Epoxy Composites

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Abstract

The effect of interfacial modification on flexural strength of epoxy composites filled with modified ZrB2-Al2O3 composite fillers was investigated in order to explore the stress distribution of modified composites under external load. The mechanical performance of epoxy composites filled with 0 vol%, 1 vol%, 3 vol% and 5 vol% unmodified and modified ZrB2-Al2O3 fillers was characterized by three point bending (TPB) tests. The fracture surfaces of epoxy composites were observed by scanning electronic microscope (SEM). The results showed that the epoxy composite reinforced by 1 vol% modified fillers exhibited the optimal mechanical performance. According to the Von Mises stress contours simulated by finite element models (FEM) and the SEM images, it was shown that the modified ZrB2-Al2O3 multiphase fillers could homogenize the stress in the epoxy composites due to the transition effect resulted from the interfacial modification layers on the surfaces of multiphase fillers. It contributed to the improvement of mechanical performance of epoxy composites further.

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Authors and Affiliations

  1. Department of Materials Science, Fudan University, Shanghai, 200433, China

    Yicheng Wu  (吴奕澄), Yannan He & Zhiqiang Yu  (于志强)

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  1. Yicheng Wu  (吴奕澄)
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  2. Yannan He
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  3. Zhiqiang Yu  (于志强)
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Correspondence to Zhiqiang Yu  (于志强).

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Funded by National Natural Science Foundation of China (No. 51273044)

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Wu, Y., He, Y. & Yu, Z. Flexural Stress Homogenization Effects of Interfacial Transition Layers in Modified ZrB2-Al2O3/Epoxy Composites. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 34, 1003–1007 (2019). https://doi.org/10.1007/s11595-019-2150-7

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  • DOI: https://doi.org/10.1007/s11595-019-2150-7

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