TY - JOUR
T1 - Antioxidation enhancement and siliconization mitigation for SiC coated C/C composites via a nano-structural SiC porous layer
AU - Li, Tao
AU - Zhang, Yulei
AU - Fu, Yanqin
AU - Sun, Jia
N1 - Publisher Copyright:
© 2021
PY - 2022/1
Y1 - 2022/1
N2 - A reactive nano-structural SiC porous layer on C/C surface was pre-prepared via a slurry-dipping and reaction-sintering method, using Si, C and Al2O3 powders as raw materials. Pre-introduction of nano-structural SiC porous layer helped to form a dense sintered SiC coating by the pack cementation (PC), which provided excellent oxidation protection for C/C substrate under different conditions at 1773 K and mitigated the siliconization reaction of free silicon during the PC process. Results showed that the modified SiC coating had a mass loss of only ~0.03% after 50 thermal cycles between room temperature and 1773 K in air. And the mass loss reduced by ~4.31 and ~2.25 times after isothermal oxidation in dry air and wet oxygen atmosphere at 1773 K, respectively. Furthermore, because of the delaying effect of SiC porous layer on free silicon infiltrating into C/C substrate, the bending strength of modified SiC-coated C/C composites has increased by 93.0%.
AB - A reactive nano-structural SiC porous layer on C/C surface was pre-prepared via a slurry-dipping and reaction-sintering method, using Si, C and Al2O3 powders as raw materials. Pre-introduction of nano-structural SiC porous layer helped to form a dense sintered SiC coating by the pack cementation (PC), which provided excellent oxidation protection for C/C substrate under different conditions at 1773 K and mitigated the siliconization reaction of free silicon during the PC process. Results showed that the modified SiC coating had a mass loss of only ~0.03% after 50 thermal cycles between room temperature and 1773 K in air. And the mass loss reduced by ~4.31 and ~2.25 times after isothermal oxidation in dry air and wet oxygen atmosphere at 1773 K, respectively. Furthermore, because of the delaying effect of SiC porous layer on free silicon infiltrating into C/C substrate, the bending strength of modified SiC-coated C/C composites has increased by 93.0%.
KW - Antioxidative performances
KW - Carbon/carbon composites
KW - Mechanical properties
KW - Silicon carbide ceramic coating
UR - http://www.scopus.com/inward/record.url?scp=85120874113&partnerID=8YFLogxK
U2 - 10.1016/j.corsci.2021.109954
DO - 10.1016/j.corsci.2021.109954
M3 - 文章
AN - SCOPUS:85120874113
SN - 0010-938X
VL - 194
JO - Corrosion Science
JF - Corrosion Science
M1 - 109954
ER -