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Sensitivity of Strength Via Temperature for SiC/SiC Composites and SiC Fibers in an Oxygen-Free Environment

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Abstract

The sensitivity of strength via temperature for SiC/SiC composites and SiC fibers in an oxygen-free environment is studied through experimental investigation and theoretical analysis. Tensile tests are performed on SiC/SiC minicomposites at room temperature, 500 and 1000 ℃ in an oxygen-free environment. A high-efficiency method is proposed to obtain the high-temperature strength distribution of SiC fibers. The experimental results show that the sensitivity of strength via temperature is high for SiC fibers but low for SiC/SiC minicomposites. To explain this phenomenon, the strength model of minicomposites is developed. The theoretical analysis reveals that the low sensitivity of strength via temperature for minicomposites results from that the influences of the changes of the Weibull parameters m and σ0 at elevated temperatures are offset.

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Data Availability

The datasets generated during and analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [grant numbers 51675266, 11972183]; China Postdoctoral Science Foundation [grant number 2021M691566]; and Jiangsu Planned Projects for Postdoctoral Research Funds.

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Authors and Affiliations

  1. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China

    Sheng Zhang & Weikang Meng

  2. Key Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China

    Sheng Zhang & Weikang Meng

  3. China International Engineering Consulting Corporation, Beijing, 100048, P.R. China

    Zhiguo Zhang

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  1. Sheng Zhang
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  2. Weikang Meng
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Correspondence to Sheng Zhang.

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Zhang, S., Meng, W. & Zhang, Z. Sensitivity of Strength Via Temperature for SiC/SiC Composites and SiC Fibers in an Oxygen-Free Environment. Appl Compos Mater 28, 1979–1995 (2021). https://doi.org/10.1007/s10443-021-09961-4

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  • DOI: https://doi.org/10.1007/s10443-021-09961-4

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