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Research Article | Open Access

Microstructural regulation, oxidation resistance, and mechanical properties of Cf/SiC/SiHfBOC composites prepared by chemical vapor infiltration with precursor infiltration pyrolysis

Yang LYU1, Baihe DU1, Guiqing CHEN1, Guangdong ZHAO2, Yuan CHENG1, Shanbao ZHOU1( ), Qingrong LV3, Xinghong ZHANG1, Wenbo HAN1( )
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, and Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
School of Physics and Material Science, Anhui University, Hefei 230601, China
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Abstract

To further improve the oxidation resistance of polymer derived ceramic (PDC) composites in harsh environments, Cf/SiC/SiHfBOC composites were prepared by chemical vapor infiltration (CVI) and precursor impregnation pyrolysis (PIP) methods. The weight retention change, mechanical properties, and microstructure of Cf/SiC/SiHfBOC before and after oxidation in air were studied in details. Microscopic analyses showed that only the interface between the ceramics and fibers was oxidized to some extent, and hafnium had been enriched on the composite surface after oxidizing at different temperature. The main oxidation products of Cf/SiC/SiHfBOC composites were HfO2 and HfSiO4 after oxidation at 1500 ℃ for 60 min. Moreover, the weight retention ratio and compressive strength of the Cf/SiC/SiHfBOC composites are 83.97% and 23.88±3.11 MPa, respectively. It indicates that the Cf/SiC/SiHfBOC composites should be promising to be used for a short time in the oxidation environment at 1500 ℃.

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Keywords

Cf/SiC/SiHfBOC compositesprecursor infiltration pyrolysis (PIP) methodmechanical propertieshigh-temperature oxidation resistance

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Journal of Advanced Ceramics
Volume 11 Issue 1,
January 2022
Pages 120-135
DOI: 10.1007/s40145-021-0521-y

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Cite this article:
LYU Y, DU B, CHEN G, et al. Microstructural regulation, oxidation resistance, and mechanical properties of Cf/SiC/SiHfBOC composites prepared by chemical vapor infiltration with precursor infiltration pyrolysis. Journal of Advanced Ceramics, 2022, 11(1): 120-135. https://doi.org/10.1007/s40145-021-0521-y

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Received: 05 April 2021
Revised: 12 July 2021
Accepted: 15 July 2021
Published: 27 October 2021
© The Author(s) 2021.

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