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Research Article | Open Access

Ablation of C/SiC-HfC composite prepared by precursor infiltration and pyrolysis in plasma wind tunnel

Liuyang DUANa, Lei LUOb, Liping LIUa,c, Yiguang WANGd( )
Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
Beijing Institute of Long March Aerospace Vehicles, Beijing 100076, China
Ultrahigh Speed Aerodynamics Research Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China
Institute of Advanced Structure Technology, Beijing Institute of Technology, Haidian District, Beijing 100081, China
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Abstract

Carbon fiber reinforced silicon carbide-hafnium carbide (C/SiC-HfC) composite was prepared by precursor infiltration and pyrolysis process. Then, ablation behavior of C/SiC-HfC was evaluated in plasma wind tunnel. It was found that oxide layer formed during ablation significantly influenced the surface temperature. Formation of dense HfO2-SiO2 layer under low heat flux led to stable surface temperature. Silica (SiO2) on the surface was gradually consumed when heat flux increased, resulting in conversion of HfO2-SiO2 on the surface to HfO2. Converted HfO2 with high catalytic coefficient absorbed more energy, causing gradual increase in the surface temperature. Formed oxide layer was destroyed at high heat flux and high stagnation point pressure. After carbon fiber lost the protection of HfO2-SiO2 layer, it burned immediately, leading to surface temperature jump.

Keywords

C/SiC-HfC compositeprecursor infiltration and pyrolysisablationplasma wind tunnel

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Journal of Advanced Ceramics
Volume 9 Issue 3,
June 2020
Pages 393-402
DOI: 10.1007/s40145-020-0379-4

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Cite this article:
DUAN L, LUO L, LIU L, et al. Ablation of C/SiC-HfC composite prepared by precursor infiltration and pyrolysis in plasma wind tunnel. Journal of Advanced Ceramics, 2020, 9(3): 393-402. https://doi.org/10.1007/s40145-020-0379-4

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Received: 23 December 2019
Revised: 14 March 2020
Accepted: 31 March 2020
Published: 05 June 2020
© The Author(s) 2020

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