TY - JOUR
T1 - SiC-Si coating with micro-pores to protect carbon/carbon composites against oxidation
AU - Zhu, Xiaofei
AU - Zhang, Yulei
AU - Su, Yangyang
AU - Fu, Yanqin
AU - Zhang, Pei
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - To improve the oxidation resistance of carbon/carbon (C/C) composites at high temperatures, a SiC-Si coating with micro-pores was prepared by slurry and heat-treatment on the surface of C/C composites with SiC-Si inner coating acquired by pack cementation (PC). The microstructure, phase composition, element distribution, and anti-oxidation properties of the dual-layer SiC-Si coating were investigated. The results show that a SiO2-SiC inlay structure was formed during the oxidation process, due to a large amount of SiO2 rapidly generated by the oxidation of SiC particles in the porous coating. The coating with this structure could inhibit the cracking of SiO2 glass and had a good resistance to oxygen diffusion. Moreover, the crack propagation was blocked by the remaining micro-pores of the coating. The coating could protect C/C composites against oxidation for 846 h only with the mass loss of 0.16 % at 1773 K in air.
AB - To improve the oxidation resistance of carbon/carbon (C/C) composites at high temperatures, a SiC-Si coating with micro-pores was prepared by slurry and heat-treatment on the surface of C/C composites with SiC-Si inner coating acquired by pack cementation (PC). The microstructure, phase composition, element distribution, and anti-oxidation properties of the dual-layer SiC-Si coating were investigated. The results show that a SiO2-SiC inlay structure was formed during the oxidation process, due to a large amount of SiO2 rapidly generated by the oxidation of SiC particles in the porous coating. The coating with this structure could inhibit the cracking of SiO2 glass and had a good resistance to oxygen diffusion. Moreover, the crack propagation was blocked by the remaining micro-pores of the coating. The coating could protect C/C composites against oxidation for 846 h only with the mass loss of 0.16 % at 1773 K in air.
KW - Carbon/carbon composites
KW - Dual-layer SiC-Si coating
KW - Micro-pores
KW - Oxidation resistance
KW - SiO-SiC inlay structure
UR - https://www.scopus.com/pages/publications/85090010359
U2 - 10.1016/j.jeurceramsoc.2020.08.045
DO - 10.1016/j.jeurceramsoc.2020.08.045
M3 - 文章
AN - SCOPUS:85090010359
SN - 0955-2219
VL - 41
SP - 114
EP - 120
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 1
ER -