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
Efficient fabrication of light C/C-SiHfCB composites with excellent thermal shock resistance and high temperature ablation resistance above 2000℃
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.
C/C composites / Ultra-high temperature ceramics precursor / Thermal shock resistance / Ablation resistance
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
|
| [33] |
|
| [34] |
|
| [35] |
|
| [36] |
|
| [37] |
ASTM C1525-2004. Standard Test Method for Determination of Thermal Shock Resistance for Advanced Ceramics by Water Quenching ( 2004).
|
| [38] |
GJB 323B-2018. Ablative material ablation test method, Oxyacetylene Ablation Test Method ( 2018).
|
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
/
| 〈 |
|
〉 |