Efficient fabrication of light C/C-SiHfCB composites with excellent thermal shock resistance and high temperature ablation resistance above 2000℃

Yang Lyu, Fei Li, Chunlin Wang, Yuhao Fang, Wenzheng Zhang, Mingyi Tan, Ping Hu, Yuan Cheng, Wenbo Han, Xinghong Zhang

Extreme Materials ›› 2026, Vol. 2 ›› Issue (2) : 100029.

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Extreme Materials ›› 2026, Vol. 2 ›› Issue (2) : 100029. DOI: 10.1016/j.exm.2026.100029
Research article

Efficient fabrication of light C/C-SiHfCB composites with excellent thermal shock resistance and high temperature ablation resistance above 2000℃

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Abstract

To meet the stringent demands for toughening and ablation resistance in high-speed aircraft components, C/C-SiHfCB composites were fabricated by introducing a novel liquid SiHfCB precursor into a porous C/C matrix via high-pressure precursor infiltration and pyrolysis. This approach yielded an integrated three-dimensional continuous ceramic phase tightly bonded to the matrix. The composite achieved a flexural strength of 237±42 MPa with non-brittle fracture, a critical thermal shock temperature difference of 912℃. During oxyacetylene flame tests, extremely low linear ablation rates of 5.7×10-4 mm/s and 15.6×10-4 mm/s were recorded at 2000℃ and 2150℃, respectively. An effective oxygen diffusion barrier consisting of an HfO2 skeleton with SiO2-filled pores was formed. This study offers a viable strategy for the synergistic optimization of mechanical and ablation properties.

Key words

C/C composites / Ultra-high temperature ceramics precursor / Thermal shock resistance / Ablation resistance

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Yang Lyu , Fei Li , Chunlin Wang , et al . Efficient fabrication of light C/C-SiHfCB composites with excellent thermal shock resistance and high temperature ablation resistance above 2000℃[J]. Extreme Materials. 2026, 2(2): 100029 https://doi.org/10.1016/j.exm.2026.100029

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (Grant No. 52502073, 52502072, 52502060, 52472091, 52541021), Basic Research Program of Jiangsu (Grant No. BK20250526, BK20250534), China Postdoctoral Science Foundation (No. 2025M780132), Major Program of the National Natural Science Foundation of China (No. 52293372), and the Fundamental Research Funds for the Central Universities (No. HIT-XTCX-2). Yang Lyu and Wenzheng Zhang acknowledge the supported by Jiangsu Funding Program for Excellent Postdoctoral Talent.

Funding

the National Natural Science Foundation of China(52502073)
the National Natural Science Foundation of China(52502072)
the National Natural Science Foundation of China(52502060)
the National Natural Science Foundation of China(52472091)
the National Natural Science Foundation of China(52541021)
Basic Research Program of Jiangsu(BK20250526)
Basic Research Program of Jiangsu(BK20250534)
China Postdoctoral Science Foundation(2025M780132)
Major Program of the National Natural Science Foundation of China(52293372)
the Fundamental Research Funds for the Central Universities(HIT-XTCX-2)

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