TY - JOUR
T1 - Improved oxidation resistance of CVD-SiC coating at 1300 ℃ by Ti addition
AU - Liu, Bing
AU - Guo, Lingxiang
AU - Shi, Huilun
AU - Zhang, Yi
AU - Yin, Xuemin
AU - Sun, Jia
AU - Fu, Qiangang
N1 - Publisher Copyright:
© 2025 Elsevier Ltd
PY - 2025/8
Y1 - 2025/8
N2 - To broaden the protective temperature range of SiC coatings, Ti was incorporated into SiC coatings by molten salts-mediated pack cementation method. During the coating preparation, molten salts accelerated the reactions between Ti and SiC, especially the generation of intermediate products, TiClx and SiClx, for gas-solid reactions. The growth rate of the reaction layer conforms to the parabolic diffusion law. After multiple heat treatments and molten salt exposition, the mechanical properties of Ti-Si-C-C/C composites are not damaged, which is still at the same level as SiC-C/C composites and higher than that of C/C composites. Furthermore, the mass losses of Ti-Si-C-C/C composites, after oxidation at 1300 ℃ for 508 h and 30 thermal cycles between 1300 ℃ to room temperature, are only 0.77 % and 0.79 %, respectively. Such improved oxidation resistances can be attributed to the timely healing of surface cracks by the Ti-Si-O glass.
AB - To broaden the protective temperature range of SiC coatings, Ti was incorporated into SiC coatings by molten salts-mediated pack cementation method. During the coating preparation, molten salts accelerated the reactions between Ti and SiC, especially the generation of intermediate products, TiClx and SiClx, for gas-solid reactions. The growth rate of the reaction layer conforms to the parabolic diffusion law. After multiple heat treatments and molten salt exposition, the mechanical properties of Ti-Si-C-C/C composites are not damaged, which is still at the same level as SiC-C/C composites and higher than that of C/C composites. Furthermore, the mass losses of Ti-Si-C-C/C composites, after oxidation at 1300 ℃ for 508 h and 30 thermal cycles between 1300 ℃ to room temperature, are only 0.77 % and 0.79 %, respectively. Such improved oxidation resistances can be attributed to the timely healing of surface cracks by the Ti-Si-O glass.
KW - C/C composites
KW - Mechanical property
KW - Molten salts-mediated pack cementation method
KW - Oxidation
KW - SiC
UR - http://www.scopus.com/inward/record.url?scp=85217935075&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2025.117289
DO - 10.1016/j.jeurceramsoc.2025.117289
M3 - 文章
AN - SCOPUS:85217935075
SN - 0955-2219
VL - 45
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 9
M1 - 117289
ER -