TY - JOUR
T1 - Oxidation protective SiC-Si coating for carbon/carbon composites by gaseous silicon infiltration and pack cementation
T2 - A comparative investigation
AU - Zhou, Lei
AU - Fu, Qiangang
AU - Hu, Dou
AU - Wei, Yalong
AU - Tong, Mingde
AU - Zhang, Jiaping
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - To reduce the influence of coating preparation on the mechanical properties of carbon/carbon composites and further improve the antioxidant properties of the coating, a SiC-Si coating was fabricated on carbon/carbon composites by gaseous silicon infiltration (GSI-SiC-Si). For comparison, a SiC-Si coating was also prepared by pack cementation (PC-SiC-Si). A comparative investigation showed the GSI-SiC-Si coating possesses relative lower roughness, better mechanical and anti-oxidation properties. The GSI-SiC-Si coating samples maintained 87.8 % flexural strength of bare C/C composites, while the C/C substrate was severely siliconized in PC-SiC-Si coating samples. The GSI-SiC-Si coating samples could undergo 30 thermal cycles between 1773 K and room temperature and effectively protect C/C composites from oxidation at 1773 K for more than 500 h without weight loss.
AB - To reduce the influence of coating preparation on the mechanical properties of carbon/carbon composites and further improve the antioxidant properties of the coating, a SiC-Si coating was fabricated on carbon/carbon composites by gaseous silicon infiltration (GSI-SiC-Si). For comparison, a SiC-Si coating was also prepared by pack cementation (PC-SiC-Si). A comparative investigation showed the GSI-SiC-Si coating possesses relative lower roughness, better mechanical and anti-oxidation properties. The GSI-SiC-Si coating samples maintained 87.8 % flexural strength of bare C/C composites, while the C/C substrate was severely siliconized in PC-SiC-Si coating samples. The GSI-SiC-Si coating samples could undergo 30 thermal cycles between 1773 K and room temperature and effectively protect C/C composites from oxidation at 1773 K for more than 500 h without weight loss.
KW - C/C composites
KW - Mechanical properties
KW - Oxidation resistance
KW - Thermal-shock resistance
UR - http://www.scopus.com/inward/record.url?scp=85089466995&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2020.07.040
DO - 10.1016/j.jeurceramsoc.2020.07.040
M3 - 文章
AN - SCOPUS:85089466995
SN - 0955-2219
VL - 41
SP - 194
EP - 203
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 1
ER -