TY - JOUR
T1 - Ablation behavior of coating-matrix integrated C/C–SiC-HfC-ZrC composites in plasma wind tunnel
AU - Kou, Sijie
AU - Liu, Xian
AU - Yang, Shaobo
AU - Guo, Chun
AU - Fan, Shangwu
AU - Deng, Juanli
N1 - Publisher Copyright:
© 2025 Elsevier Ltd
PY - 2026/1/28
Y1 - 2026/1/28
N2 - Coating-matrix integrated C/C–SiC-HfC-ZrC composites were fabricated via RMI using HfSi2-ZrSi2 hybrid alloys and slurry brushing. The composite featured a borosilicate glass outer layer and a continuous in-situ (Zr, Hf)Si2-(Hf, Zr)C–SiC coating integrated with the matrix. In a plasma wind tunnel at 5.0 MW/m2 and 7.0 kPa, the composite exhibited a linear ablation rate of −2.30 × 10−3 mm/s and a mass ablation rate of 4.90 × 10−4 g/s. The coating debonded from the substrate during ablation caused by thermal mismatch and the escape of gaseous products, but effectively blocked heat, flow, and oxygen, protecting the substrate. Surface (Hf, Zr)O2 densified via quasi-liquid-phase sintering, with liquid-phase dissipation, temperature surge, and transverse crack inside coating formation. Gaseous product evolution, SiO2 flow, and temperature gradients promoted columnar (Hf, Zr)O2 growth, retarding atomic oxygen erosion. Under harsher conditions (6.0 MW/m2, 9.0 kPa), the surface temperature exceeded 2800 °C, causing oxide melting, coating degradation, and severe substrate oxidation.
AB - Coating-matrix integrated C/C–SiC-HfC-ZrC composites were fabricated via RMI using HfSi2-ZrSi2 hybrid alloys and slurry brushing. The composite featured a borosilicate glass outer layer and a continuous in-situ (Zr, Hf)Si2-(Hf, Zr)C–SiC coating integrated with the matrix. In a plasma wind tunnel at 5.0 MW/m2 and 7.0 kPa, the composite exhibited a linear ablation rate of −2.30 × 10−3 mm/s and a mass ablation rate of 4.90 × 10−4 g/s. The coating debonded from the substrate during ablation caused by thermal mismatch and the escape of gaseous products, but effectively blocked heat, flow, and oxygen, protecting the substrate. Surface (Hf, Zr)O2 densified via quasi-liquid-phase sintering, with liquid-phase dissipation, temperature surge, and transverse crack inside coating formation. Gaseous product evolution, SiO2 flow, and temperature gradients promoted columnar (Hf, Zr)O2 growth, retarding atomic oxygen erosion. Under harsher conditions (6.0 MW/m2, 9.0 kPa), the surface temperature exceeded 2800 °C, causing oxide melting, coating degradation, and severe substrate oxidation.
KW - Ablation behavior
KW - C/C–SiC-HfC-ZrC composites
KW - Coating-matrix integration
KW - Plasma wind tunnel
UR - https://www.scopus.com/pages/publications/105020949139
U2 - 10.1016/j.compositesb.2025.113178
DO - 10.1016/j.compositesb.2025.113178
M3 - 文章
AN - SCOPUS:105020949139
SN - 1359-8368
VL - 310
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 113178
ER -