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


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 °C 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 °C.


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This research work is supported by the Key Program of the National Natural Science Foundation of China (No. 52032003), the National Natural Science Foundation of China (Nos. 519720820 and 51772061), the Science Foundation of the National Key Laboratory of Science and Technology on Advanced Composites in Special Environments (No. 6142905202112), and the Heilongjiang Provincial Postdoctoral Science Foundation (No. LBH-Z20144).

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Correspondence to Shanbao Zhou or Wenbo Han.

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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. J Adv Ceram (2021).

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  • Cf/SiC/SiHfBOC composites
  • precursor infiltration pyrolysis (PIP) method
  • mechanical properties
  • high-temperature oxidation resistance